diff --git a/dbm_lib/config/config_raw_feature.py b/dbm_lib/config/config_raw_feature.py
index 5494e21d..e0878dcf 100644
--- a/dbm_lib/config/config_raw_feature.py
+++ b/dbm_lib/config/config_raw_feature.py
@@ -17,7 +17,7 @@ class ConfigRawReader(object):
         Args:
             feature_config_yml (None, optional): yml file defined service configuration
         """
-        
+
         if feature_config_yml is None:
             feature_config = DBMLIB_FEATURE_CONFIG
         else:
@@ -25,15 +25,15 @@ class ConfigRawReader(object):
 
         with open(feature_config, 'r') as ymlfile:
             config = yaml.load(ymlfile)
-            
+
             #Verbal features
             self.base_raw = config
             self.err_reason = config['raw_feature']['error_reason']
-            
+
             #Output range
             self.mov_headvel_start = config['raw_feature']['mov_headvel_start']
             self.mov_headvel_end = config['raw_feature']['mov_headvel_end']
-            
+
             #Acoustic variable
             self.aco_int = config['raw_feature']['aco_int']
             self.aco_ff = config['raw_feature']['aco_ff']
@@ -210,7 +210,7 @@ class ConfigRawReader(object):
             self.fac_AsymMaskEye = config['raw_feature']['fac_AsymMaskEye']
             self.fac_AsymMaskEyebrow = config['raw_feature']['fac_AsymMaskEyebrow']
             self.fac_AsymMaskCom = config['raw_feature']['fac_AsymMaskCom']
-            
+
             #Movement features
             self.head_vel = config['raw_feature']['head_vel']
             self.mov_blink_ear = config['raw_feature']['mov_blink_ear']
@@ -222,4 +222,18 @@ class ConfigRawReader(object):
             self.mov_Hpose_Yaw = config['raw_feature']['mov_Hpose_Yaw']
             self.mov_Hpose_Roll = config['raw_feature']['mov_Hpose_Roll']
             self.mov_Hpose_Dist = config['raw_feature']['mov_Hpose_Dist']
-            
\ No newline at end of file
+            self.mov_freq_trem_freq = config['raw_feature']['mov_freq_trem_freq']
+            self.mov_freq_trem_index = config['raw_feature']['mov_freq_trem_index']
+            self.mov_freq_trem_pindex = config['raw_feature']['mov_freq_trem_pindex']
+            self.mov_amp_trem_freq = config['raw_feature']['mov_amp_trem_freq']
+            self.mov_amp_trem_index = config['raw_feature']['mov_amp_trem_index']
+            self.mov_amp_trem_pindex = config['raw_feature']['mov_amp_trem_pindex']
+            self.fac_tremor_median_5 = config['raw_feature']['fac_tremor_median_5']
+            self.fac_tremor_median_12 = config['raw_feature']['fac_tremor_median_12']
+            self.fac_tremor_median_8 = config['raw_feature']['fac_tremor_median_8']
+            self.fac_tremor_median_48 = config['raw_feature']['fac_tremor_median_48']
+            self.fac_tremor_median_54 = config['raw_feature']['fac_tremor_median_54']
+            self.fac_tremor_median_28 = config['raw_feature']['fac_tremor_median_28']
+            self.fac_tremor_median_51 = config['raw_feature']['fac_tremor_median_51']
+            self.fac_tremor_median_66 = config['raw_feature']['fac_tremor_median_66']
+            self.fac_tremor_median_57 = config['raw_feature']['fac_tremor_median_57']
diff --git a/dbm_lib/controller/process_feature.py b/dbm_lib/controller/process_feature.py
index 3282edc2..f5112da2 100644
--- a/dbm_lib/controller/process_feature.py
+++ b/dbm_lib/controller/process_feature.py
@@ -7,7 +7,7 @@ created: 2020-20-07
 from dbm_lib.dbm_features.raw_features.audio import intensity, pitch_freq, hnr, gne, voice_frame_score, formant_freq
 from dbm_lib.dbm_features.raw_features.audio import pause_segment, jitter, shimmer, mfcc
 from dbm_lib.dbm_features.raw_features.video import face_asymmetry, face_au, face_emotion_expressivity, face_landmark
-from dbm_lib.dbm_features.raw_features.movement import head_motion, eye_blink
+from dbm_lib.dbm_features.raw_features.movement import head_motion, eye_blink, voice_tremor
 
 import subprocess
 import logging
@@ -19,13 +19,13 @@ logging.basicConfig(level=logging.INFO)
 logger=logging.getLogger()
 
 def audio_to_wav(input_filepath):
-    """ Extracts a video's audio file and saves it to wav 
+    """ Extracts a video's audio file and saves it to wav
     Args:
-        input_filepath: (str)  
+        input_filepath: (str)
     Returns:
     """
     try:
-        
+
         fname, _ = splitext(input_filepath)
         output_filepath = fname + '.wav'
 
@@ -37,7 +37,7 @@ def audio_to_wav(input_filepath):
             logger.info('wav output saved in {}'.format(output_filepath))
         else:
             logger.info('Output file {} already exists'.format(output_filepath))
-        
+
     except Exception as e:
         logger.error('Failed to extract audio from Video')
 
@@ -50,38 +50,41 @@ def process_acoustic(video_uri, out_dir, dbm_group, r_config):
     """
     if dbm_group != None and len(dbm_group)>0 and 'acoustic' not in dbm_group:
         return
-    
+
     logger.info('Processing acoustic variables from data in {}'.format(video_uri))
     logger.info('processing audio intensity....')
     intensity.run_intensity(video_uri, out_dir, r_config)
-    
+
     logger.info('processing audio pitch freq....')
     pitch_freq.run_pitch(video_uri, out_dir, r_config)
-    
+
     logger.info('processing HNR....')
     hnr.run_hnr(video_uri, out_dir, r_config)
-    
+
     logger.info('processing GNE....')
     gne.run_gne(video_uri, out_dir, r_config)
-    
+
     logger.info('processing voice frame score....')
     voice_frame_score.run_vfs(video_uri, out_dir, r_config)
-    
+
     logger.info('processing formant frequency....')
     formant_freq.run_formant(video_uri, out_dir, r_config)
-    
+
     logger.info('processing pause segment....')
     pause_segment.run_pause_segment(video_uri, out_dir, r_config)
-    
+
     logger.info('processing jitter....')
     jitter.run_jitter(video_uri, out_dir, r_config)
-    
+
     logger.info('processing shimmer....')
     shimmer.run_shimmer(video_uri, out_dir, r_config)
-    
+
     logger.info('processing mfcc....')
     mfcc.run_mfcc(video_uri, out_dir, r_config)
-    
+
+    logger.info('processing voice tremor....')
+    voice_tremor.run_vtremor(video_uri, out_dir, r_config)
+
 def process_facial(video_uri, out_dir, dbm_group, r_config):
     """
     processing facial features
@@ -91,20 +94,20 @@ def process_facial(video_uri, out_dir, dbm_group, r_config):
     """
     if dbm_group != None and len(dbm_group)>0 and 'facial' not in dbm_group:
         return
-    
+
     logger.info('Processing facial variables from data in {}'.format(video_uri))
     logger.info('processing facial asymmetry....')
     face_asymmetry.run_face_asymmetry(video_uri, out_dir, r_config)
-    
+
     logger.info('processing facial Action Unit....')
     face_au.run_face_au(video_uri, out_dir, r_config)
-    
+
     logger.info('processing facial expressivity....')
     face_emotion_expressivity.run_face_expressivity(video_uri, out_dir, r_config)
-    
+
     logger.info('processing facial landmark....')
     face_landmark.run_face_landmark(video_uri, out_dir, r_config)
-    
+
 def process_movement(video_uri, out_dir, dbm_group, r_config, dlib_model):
     """
     processing facial features
@@ -115,23 +118,24 @@ def process_movement(video_uri, out_dir, dbm_group, r_config, dlib_model):
     """
     if dbm_group != None and len(dbm_group)>0 and 'movement' not in dbm_group:
         return
-    
+
     logger.info('Processing movement variables from data in {}'.format(video_uri))
     logger.info('processing head movement....')
     head_motion.run_head_movement(video_uri, out_dir, r_config)
-    
+
     logger.info('processing eye blink....')
     eye_blink.run_eye_blink(video_uri, out_dir, r_config, dlib_model)
-    
+
+    logger.info('processing voice tremor....')
+    voice_tremor.run_vtremor(video_uri, out_dir, r_config)
+
 def remove_file(file_path):
     """
-    removing wav file 
+    removing wav file
     """
     file_dir = dirname(file_path)
     file_name, _ = splitext(basename(file_path))
     wav_file = glob.glob(join(file_dir, file_name + '.wav'))
-    
+
     if len(wav_file)> 0:
         os.remove(wav_file[0])
-    
-    
\ No newline at end of file
diff --git a/dbm_lib/dbm_features/raw_features/movement/__init__.py b/dbm_lib/dbm_features/raw_features/movement/__init__.py
index f2a2d4b9..dca2f624 100644
--- a/dbm_lib/dbm_features/raw_features/movement/__init__.py
+++ b/dbm_lib/dbm_features/raw_features/movement/__init__.py
@@ -11,3 +11,5 @@ from __future__ import print_function
 import os
 
 DBMLIB_PATH = os.path.dirname(__file__)
+DBMLIB_VTREMOR_LIB = os.path.abspath(os.path.join(DBMLIB_PATH,
+                                                  '../../../../resources/libraries/voice_tremor.praat'))
diff --git a/dbm_lib/dbm_features/raw_features/movement/voice_tremor.py b/dbm_lib/dbm_features/raw_features/movement/voice_tremor.py
new file mode 100644
index 00000000..52f9c398
--- /dev/null
+++ b/dbm_lib/dbm_features/raw_features/movement/voice_tremor.py
@@ -0,0 +1,93 @@
+import pandas as pd
+import os
+import glob
+from os.path import join
+import parselmouth
+from parselmouth.praat import call, run_file
+import numpy as np
+import librosa
+import json
+import re
+import logging
+
+from dbm_lib.dbm_features.raw_features.util import util as ut
+from dbm_lib.dbm_features.raw_features.movement import DBMLIB_VTREMOR_LIB
+
+logging.basicConfig(level=logging.INFO)
+logger=logging.getLogger()
+
+vt_dir = 'movement/voice_tremor'
+csv_ext = '_vtremor.csv'
+
+#Executing praat script using parselmouth function
+def tremor_praat(snd_file,r_cfg):
+    """
+        Generating Voice tremor endpoint dataframe
+        Args:
+            snd_file: (.wav) parsed audio file
+            r_cfg: Raw variable configuration file
+        Returns tremor endpoint dataframe
+    """
+    snd = parselmouth.Sound(snd_file)
+    tremor_var = run_file(snd,DBMLIB_VTREMOR_LIB,capture_output=True)
+    new_tremor_var = re.sub('--undefined--', '0', tremor_var[1])
+    res = json.loads(new_tremor_var)
+    tremor_df = pd.DataFrame(res,index=['0',])
+    tremor_df.columns = [r_cfg.mov_freq_trem_freq,r_cfg.mov_amp_trem_freq,r_cfg.mov_freq_trem_index,
+                         r_cfg.mov_amp_trem_index,r_cfg.mov_freq_trem_pindex,r_cfg.mov_amp_trem_pindex]
+    return tremor_df
+
+def prepare_vtrem_output(audio_file, out_loc, r_config, fl_name):
+    """
+        Preparing voice tremor matrix
+        Args:
+            audio_file: (.wav) parsed audio file ; r_config: raw config object
+            out_loc: (str) Output directory for csv ; fl_name: file name
+    """
+    df_tremor = tremor_praat(audio_file, r_config)
+    df_tremor[r_config.err_reason] = 'Pass'# will replace with threshold in future release
+
+    logger.info('Processing Output file {} '.format(out_loc))
+    ut.save_output(df_tremor, out_loc, fl_name, vt_dir, csv_ext)
+
+def prepare_empty_vt(out_loc, fl_name, r_config, error_txt):
+
+    """
+    Preparing empty voice tremor matrix
+    """
+    cols = [r_config.mov_freq_trem_freq, r_config.mov_amp_trem_freq, r_config.mov_freq_trem_index,
+            r_config.mov_amp_trem_index, r_config.mov_freq_trem_pindex, r_config.mov_amp_trem_pindex, r_config.err_reason]
+
+    out_val = [[np.nan, np.nan, np.nan, np.nan, np.nan, np.nan, error_txt]]
+    df_tremor = pd.DataFrame(out_val, columns = cols)
+
+    logger.info('Saving Output file {} '.format(out_loc))
+    ut.save_output(df_tremor, out_loc, fl_name, vt_dir, csv_ext)
+
+def run_vtremor(video_uri, out_dir, r_config):
+    """
+    Processing all patient's for fetching Formant freq
+    ---------------
+    ---------------
+    Args:
+        video_uri: video path; r_config: raw variable config object
+        out_dir: (str) Output directory for processed output
+    """
+    try:
+        input_loc, out_loc, fl_name = ut.filter_path(video_uri, out_dir)
+        aud_filter = glob.glob(join(input_loc, fl_name + '.wav'))
+
+        if len(aud_filter)>0:
+
+            audio_file = aud_filter[0]
+            aud_dur = librosa.get_duration(filename=audio_file)
+
+            if float(aud_dur) < 0.064:
+                logger.info('Output file {} size is less than 0.064sec'.format(audio_file))
+
+                prepare_empty_vt(video_uri, out_loc, fl_name, r_config)
+                return
+            prepare_vtrem_output(audio_file, out_loc, r_config, fl_name)
+    except Exception as e:
+        logger.error('Failed to compute Voice Tremor {} for {}'.format(e,video_uri))
+        prepare_empty_vt(out_loc, fl_name, r_config, e)
diff --git a/process_data.py b/process_data.py
index 0283f9f2..31f85fdb 100644
--- a/process_data.py
+++ b/process_data.py
@@ -33,11 +33,10 @@ def common_video(video_file, args, r_config):
     out_path = os.path.join(args.output_path, 'raw_variables')
     pf.audio_to_wav(video_file)
     of.process_open_face(video_file, os.path.dirname(video_file), out_path, OPENFACE_PATH, args.dbm_group)
-
     pf.process_facial(video_file, out_path, args.dbm_group, r_config)
     pf.process_acoustic(video_file, out_path, args.dbm_group, r_config)
-    pf.remove_file(video_file)
     pf.process_movement(video_file, out_path, args.dbm_group, r_config, DLIB_SHAPE_MODEL)
+    pf.remove_file(video_file)
 
 def process_raw_video_file(args, s_config, r_config):
     """
@@ -57,7 +56,7 @@ def process_raw_video_file(args, s_config, r_config):
 
             else:
                 logger.info('Enter correct video(*.mp4) file path.')
-                
+
     except Exception as e:
         logger.error('Failed to process mp4 file.')
         pf.remove_file(video_file[0])
@@ -76,15 +75,15 @@ def process_raw_audio_file(args, s_config, r_config):
 
             if len(audio_file)>0:
                 logger.info('Calculating raw variables...')
-                
+
                 out_path = os.path.join(args.output_path, 'raw_variables')
                 pf.process_acoustic(audio_file[0], out_path, args.dbm_group, r_config)
-                
+
             else:
                 logger.info('Enter correct audio(*.wav) file path.')
     except Exception as e:
         logger.error('Failed to process wav file.')
-    
+
 def process_raw_video_dir(args, s_config, r_config):
     """
     Processing video file
@@ -95,16 +94,15 @@ def process_raw_video_dir(args, s_config, r_config):
     """
     if args.output_path != None:
         vid_loc = glob.glob(args.input_path + '/*.mp4')
-        
+
         if len(vid_loc) == 0:
             logger.info('Directory does not have any MP4 files.')
             return
-        
+
         logger.info('Calculating raw variables...')
         for vid_file in vid_loc:
             try:
-                
-                common_video(vid_file, args, r_config)  
+                common_video(vid_file, args, r_config)
             except Exception as e:
                 logger.error('Failed to process mp4 file.')
                 pf.remove_file(vid_file)
@@ -119,20 +117,20 @@ def process_raw_audio_dir(args, s_config, r_config):
     """
     if args.output_path != None:
         audio_loc = glob.glob(args.input_path + '/*.wav')
-        
+
         if len(audio_loc) == 0:
             logger.info('Directory does not have any WAV files.')
             return
-        
+
         logger.info('Calculating raw variables...')
         for audio in audio_loc:
             try:
-                
+
                 out_path = os.path.join(args.output_path, 'raw_variables')
                 pf.process_acoustic(audio, out_path, args.dbm_group, r_config)
             except Exception as e:
                 logger.error('Failed to process wav file.')
-        
+
 def process_derive(args, r_config, d_config, input_type):
     """
     Processing dbm derived variables
@@ -141,28 +139,28 @@ def process_derive(args, r_config, d_config, input_type):
         input_file = glob.glob(args.input_path)
     else:
         input_file = glob.glob(args.input_path + '/*')
-        
+
     out_raw_path = os.path.join(args.output_path, 'raw_variables')
     out_derive_path = os.path.join(args.output_path, 'derived_variables')
-    
+
     logger.info('Calculating derived variables...')
     feature_df = der.run_derive(input_file, out_raw_path, out_derive_path, r_config, d_config)
-    
+
 if __name__=="__main__":
     start_time = time.time()
     parser = argparse.ArgumentParser(description="Process video/audio......")
-    
+
     parser.add_argument("--input_path", help="path to the input files", required=True)
     parser.add_argument("--output_path", help="path to the raw and derived variable output", required=True)
     parser.add_argument("--dbm_group", help="list of feature groups", nargs='+')
-    
+
     args = parser.parse_args()
     s_config = config_reader.ConfigReader()
     r_config = config_raw_feature.ConfigRawReader()
     d_config = config_derive_feature.ConfigDeriveReader()
-    
+
     _, file_ext = os.path.splitext(os.path.basename(args.input_path))
-    
+
     if file_ext:
         input_type = 'file'
         if file_ext.lower() == '.mp4':
@@ -170,14 +168,14 @@ if __name__=="__main__":
 
         elif file_ext.lower() == '.wav':
             process_raw_audio_file(args, s_config, r_config)
-            
+
         else:
             logger.error('No WAV or MP4 files detected in input path')
     else:
         input_type = 'dir'
         process_raw_video_dir(args, s_config, r_config)
         process_raw_audio_dir(args, s_config, r_config)
-        
+
     process_derive(args, r_config, d_config, input_type)
     exec_time = time.time() - start_time
-    logger.info('Done! Processing time: {} seconds'.format(exec_time))
\ No newline at end of file
+    logger.info('Done! Processing time: {} seconds'.format(exec_time))
diff --git a/process_dbm.sh b/process_dbm.sh
index cad71b7f..424154bf 100644
--- a/process_dbm.sh
+++ b/process_dbm.sh
@@ -4,9 +4,9 @@ helpFunction()
 {
    echo ""
    echo "Usage: $0 --input_path parameterA --output_path parameterB --dbm_group parameterC"
-   echo -e "\t--input_path Description of what is parameterA"
-   echo -e "\t--output_path Description of what is parameterB"
-   echo -e "\t-dbm_group Description of what is parameterC"
+   echo -e "\t--input_path: path to the input files"
+   echo -e "\t--output_path: path to the raw and derived variable output"
+   echo -e "\t--dbm_group: list of feature groups"
    exit 1 # Exit script after printing help
 }
 
@@ -72,4 +72,4 @@ docker cp dbm_container:/app/output $output_path
 docker stop dbm_container
 docker rm dbm_container
 
-exit
\ No newline at end of file
+exit
diff --git a/resources/features/derived_feature.yml b/resources/features/derived_feature.yml
index a0759d79..43db29dc 100644
--- a/resources/features/derived_feature.yml
+++ b/resources/features/derived_feature.yml
@@ -1,9 +1,9 @@
 derive_feature:
-    
+
     #DBM Feature Group
-    FEATURE_GROUP: ['FAC_ASYM', 'FAC_AU', 'FAC_EXP', 'FAC_LMK', 'ACO_INT', 'ACO_FF', 'ACO_HNR', 'ACO_GNE', 'ACO_FM', 
-    'ACO_JITTER','ACO_SHIMMER', 'ACO_PAUSE', 'ACO_VFS', 'ACO_MFCC', 'MOV_HM', 'MOV_HP', 'EYE_BLINK']
-    
+    FEATURE_GROUP: ['FAC_ASYM', 'FAC_AU', 'FAC_EXP', 'FAC_LMK', 'ACO_INT', 'ACO_FF', 'ACO_HNR', 'ACO_GNE', 'ACO_FM',
+    'ACO_JITTER','ACO_SHIMMER', 'ACO_PAUSE', 'ACO_VFS', 'ACO_MFCC', 'MOV_HM', 'MOV_HP', 'EYE_BLINK', 'MOV_VT']
+
     #Feature group output file extensions
     FAC_ASYM_LOC: _facasym
     FAC_AU_LOC: _facau
@@ -22,31 +22,33 @@ derive_feature:
     MOV_HM_LOC: _headmov
     MOV_HP_LOC: _headpose
     EYE_BLINK_LOC: _eyeblinks
-    
+    MOV_VT_LOC: _vtremor
+
+
     #Facial category feature group
     FAC_ASYM: ['fac_AsymMaskMouth', 'fac_AsymMaskEyebrow', 'fac_AsymMaskEye', 'fac_AsymMaskCom']
-    FAC_AU: ['fac_AU01int', 'fac_AU02int', 'fac_AU04int', 'fac_AU05int', 'fac_AU06int', 'fac_AU07int', 'fac_AU09int', 
-    'fac_AU10int', 'fac_AU12int', 'fac_AU14int', 'fac_AU15int', 'fac_AU17int', 'fac_AU20int', 'fac_AU23int', 
-    'fac_AU25int', 'fac_AU26int', 'fac_AU45int', 'fac_AU01pres', 'fac_AU02pres', 'fac_AU04pres', 'fac_AU05pres', 
-    'fac_AU06pres', 'fac_AU07pres', 'fac_AU09pres', 'fac_AU10pres', 'fac_AU12pres', 'fac_AU14pres', 'fac_AU15pres', 
+    FAC_AU: ['fac_AU01int', 'fac_AU02int', 'fac_AU04int', 'fac_AU05int', 'fac_AU06int', 'fac_AU07int', 'fac_AU09int',
+    'fac_AU10int', 'fac_AU12int', 'fac_AU14int', 'fac_AU15int', 'fac_AU17int', 'fac_AU20int', 'fac_AU23int',
+    'fac_AU25int', 'fac_AU26int', 'fac_AU45int', 'fac_AU01pres', 'fac_AU02pres', 'fac_AU04pres', 'fac_AU05pres',
+    'fac_AU06pres', 'fac_AU07pres', 'fac_AU09pres', 'fac_AU10pres', 'fac_AU12pres', 'fac_AU14pres', 'fac_AU15pres',
     'fac_AU17pres', 'fac_AU20pres', 'fac_AU23pres', 'fac_AU25pres', 'fac_AU26pres', 'fac_AU28pres', 'fac_AU45pres']
     FAC_EXP: ['hap_exp', 'sad_exp', 'sur_exp', 'fea_exp', 'ang_exp', 'dis_exp', 'con_exp', 'happ_occ', 'sad_occ',
     'sur_occ', 'fea_occ', 'ang_occ', 'dis_occ', 'con_occ', 'pos_exp', 'neg_exp', 'com_exp', 'hap_exp_full',
     'sad_exp_full', 'sur_exp_full','fea_exp_full', 'ang_exp_full', 'dis_exp_full', 'con_exp_full', 'pos_exp_full',
     'neg_exp_full', 'com_exp_full']
-    FAC_LMK: ['fac_LMK00disp', 'fac_LMK01disp', 'fac_LMK02disp', 'fac_LMK03disp', 'fac_LMK04disp', 
-    'fac_LMK05disp', 'fac_LMK06disp', 'fac_LMK07disp', 'fac_LMK08disp', 'fac_LMK09disp', 'fac_LMK10disp', 
-    'fac_LMK11disp', 'fac_LMK12disp', 'fac_LMK13disp', 'fac_LMK14disp', 'fac_LMK15disp', 'fac_LMK16disp', 
-    'fac_LMK17disp', 'fac_LMK18disp', 'fac_LMK19disp', 'fac_LMK20disp', 'fac_LMK21disp', 'fac_LMK22disp', 
-    'fac_LMK23disp', 'fac_LMK24disp', 'fac_LMK25disp', 'fac_LMK26disp', 'fac_LMK27disp', 'fac_LMK28disp', 
-    'fac_LMK29disp', 'fac_LMK30disp', 'fac_LMK31disp', 'fac_LMK32disp', 'fac_LMK33disp', 'fac_LMK34disp', 
-    'fac_LMK35disp', 'fac_LMK36disp', 'fac_LMK37disp', 'fac_LMK38disp', 'fac_LMK39disp', 'fac_LMK40disp', 
-    'fac_LMK41disp', 'fac_LMK42disp', 'fac_LMK43disp', 'fac_LMK44disp', 'fac_LMK45disp', 'fac_LMK46disp', 
-    'fac_LMK47disp', 'fac_LMK48disp', 'fac_LMK49disp', 'fac_LMK50disp', 'fac_LMK51disp', 'fac_LMK52disp', 
-    'fac_LMK53disp', 'fac_LMK54disp', 'fac_LMK55disp', 'fac_LMK56disp', 'fac_LMK57disp', 'fac_LMK58disp', 
-    'fac_LMK59disp', 'fac_LMK60disp', 'fac_LMK61disp', 'fac_LMK62disp', 'fac_LMK63disp', 'fac_LMK64disp', 
+    FAC_LMK: ['fac_LMK00disp', 'fac_LMK01disp', 'fac_LMK02disp', 'fac_LMK03disp', 'fac_LMK04disp',
+    'fac_LMK05disp', 'fac_LMK06disp', 'fac_LMK07disp', 'fac_LMK08disp', 'fac_LMK09disp', 'fac_LMK10disp',
+    'fac_LMK11disp', 'fac_LMK12disp', 'fac_LMK13disp', 'fac_LMK14disp', 'fac_LMK15disp', 'fac_LMK16disp',
+    'fac_LMK17disp', 'fac_LMK18disp', 'fac_LMK19disp', 'fac_LMK20disp', 'fac_LMK21disp', 'fac_LMK22disp',
+    'fac_LMK23disp', 'fac_LMK24disp', 'fac_LMK25disp', 'fac_LMK26disp', 'fac_LMK27disp', 'fac_LMK28disp',
+    'fac_LMK29disp', 'fac_LMK30disp', 'fac_LMK31disp', 'fac_LMK32disp', 'fac_LMK33disp', 'fac_LMK34disp',
+    'fac_LMK35disp', 'fac_LMK36disp', 'fac_LMK37disp', 'fac_LMK38disp', 'fac_LMK39disp', 'fac_LMK40disp',
+    'fac_LMK41disp', 'fac_LMK42disp', 'fac_LMK43disp', 'fac_LMK44disp', 'fac_LMK45disp', 'fac_LMK46disp',
+    'fac_LMK47disp', 'fac_LMK48disp', 'fac_LMK49disp', 'fac_LMK50disp', 'fac_LMK51disp', 'fac_LMK52disp',
+    'fac_LMK53disp', 'fac_LMK54disp', 'fac_LMK55disp', 'fac_LMK56disp', 'fac_LMK57disp', 'fac_LMK58disp',
+    'fac_LMK59disp', 'fac_LMK60disp', 'fac_LMK61disp', 'fac_LMK62disp', 'fac_LMK63disp', 'fac_LMK64disp',
     'fac_LMK65disp', 'fac_LMK66disp', 'fac_LMK67disp']
-    
+
     #Acoustic category feature group
     ACO_INT: ['aco_int']
     ACO_FF: ['aco_ff']
@@ -59,19 +61,21 @@ derive_feature:
     ACO_VFS: ['aco_voicePct']
     ACO_MFCC: ['aco_mfcc1','aco_mfcc2','aco_mfcc3','aco_mfcc4','aco_mfcc5','aco_mfcc6','aco_mfcc7','aco_mfcc8','aco_mfcc9',
     'aco_mfcc10','aco_mfcc11','aco_mfcc12']
-    
+
     #Movement category feature group
     MOV_HM: ['head_vel']
     MOV_HP: ['mov_Hpose_Dist','mov_Hpose_Pitch','mov_Hpose_Yaw','mov_Hpose_Roll']
     EYE_BLINK: ['mov_blink_ear', 'vid_dur', 'mov_blinkdur']
-    
+    MOV_VT: ['mov_freq_trem_freq', 'mov_freq_trem_index', 'mov_freq_trem_pindex', 'mov_amp_trem_freq',
+    'mov_amp_trem_index', 'mov_amp_trem_pindex']
+
     #Calculation for variables
     # Facial Asymmetry
     fac_AsymMaskMouth: ['mean', 'std']
     fac_AsymMaskEyebrow: ['mean', 'std']
     fac_AsymMaskEye: ['mean', 'std']
     fac_AsymMaskCom: ['mean', 'std']
-    
+
     #Facial Action Unit
     fac_AU01int: ['mean', 'std']
     fac_AU02int: ['mean', 'std']
@@ -103,12 +107,12 @@ derive_feature:
     fac_AU15pres: ['pct']
     fac_AU17pres: ['pct']
     fac_AU20pres: ['pct']
-    fac_AU23pres: ['pct'] 
+    fac_AU23pres: ['pct']
     fac_AU25pres: ['pct']
     fac_AU26pres: ['pct']
     fac_AU28pres: ['pct']
     fac_AU45pres: ['pct']
-    
+
     #Facial Expressivity
     hap_exp: ['mean', 'std']
     sad_exp: ['mean', 'std']
@@ -129,7 +133,7 @@ derive_feature:
     neu_exp: ['mean', 'std', 'pct']
     com_exp: ['mean', 'std', 'pct']
     hap_exp_full: ['mean', 'std']
-    sad_exp_full: ['mean', 'std'] 
+    sad_exp_full: ['mean', 'std']
     sur_exp_full: ['mean', 'std']
     fea_exp_full: ['mean', 'std']
     ang_exp_full: ['mean', 'std']
@@ -139,7 +143,7 @@ derive_feature:
     neg_exp_full: ['mean', 'std']
     neu_exp_full: ['mean', 'std']
     com_exp_full: ['mean', 'std']
-    
+
     #Facial Landmarks
     fac_LMK00disp: ['mean', 'std']
     fac_LMK01disp: ['mean', 'std']
@@ -151,7 +155,7 @@ derive_feature:
     fac_LMK07disp: ['mean', 'std']
     fac_LMK08disp: ['mean', 'std']
     fac_LMK09disp: ['mean', 'std']
-    fac_LMK10disp: ['mean', 'std'] 
+    fac_LMK10disp: ['mean', 'std']
     fac_LMK11disp: ['mean', 'std']
     fac_LMK12disp: ['mean', 'std']
     fac_LMK13disp: ['mean', 'std']
@@ -163,22 +167,22 @@ derive_feature:
     fac_LMK19disp: ['mean', 'std']
     fac_LMK20disp: ['mean', 'std']
     fac_LMK21disp: ['mean', 'std']
-    fac_LMK22disp: ['mean', 'std'] 
+    fac_LMK22disp: ['mean', 'std']
     fac_LMK23disp: ['mean', 'std']
     fac_LMK24disp: ['mean', 'std']
     fac_LMK25disp: ['mean', 'std']
     fac_LMK26disp: ['mean', 'std']
     fac_LMK27disp: ['mean', 'std']
     fac_LMK28disp: ['mean', 'std']
-    fac_LMK29disp: ['mean', 'std'] 
+    fac_LMK29disp: ['mean', 'std']
     fac_LMK30disp: ['mean', 'std']
     fac_LMK31disp: ['mean', 'std']
     fac_LMK32disp: ['mean', 'std']
     fac_LMK33disp: ['mean', 'std']
-    fac_LMK34disp: ['mean', 'std'] 
+    fac_LMK34disp: ['mean', 'std']
     fac_LMK35disp: ['mean', 'std']
     fac_LMK36disp: ['mean', 'std']
-    fac_LMK37disp: ['mean', 'std'] 
+    fac_LMK37disp: ['mean', 'std']
     fac_LMK38disp: ['mean', 'std']
     fac_LMK39disp: ['mean', 'std']
     fac_LMK40disp: ['mean', 'std']
@@ -193,7 +197,7 @@ derive_feature:
     fac_LMK49disp: ['mean', 'std']
     fac_LMK50disp: ['mean', 'std']
     fac_LMK51disp: ['mean', 'std']
-    fac_LMK52disp: ['mean', 'std'] 
+    fac_LMK52disp: ['mean', 'std']
     fac_LMK53disp: ['mean', 'std']
     fac_LMK54disp: ['mean', 'std']
     fac_LMK55disp: ['mean', 'std']
@@ -209,7 +213,7 @@ derive_feature:
     fac_LMK65disp: ['mean', 'std']
     fac_LMK66disp: ['mean', 'std']
     fac_LMK67disp: ['mean', 'std']
-        
+
     #Acoustic feature
     aco_int: ['mean', 'std', 'range']
     aco_ff: ['mean', 'std', 'range']
@@ -238,7 +242,7 @@ derive_feature:
     aco_mfcc10: ['mean']
     aco_mfcc11: ['mean']
     aco_mfcc12: ['mean']
-    
+
     #Movement feature
     head_vel: ['mean', 'std']
     mov_Hpose_Dist: ['mean', 'std']
@@ -248,3 +252,9 @@ derive_feature:
     mov_blink_ear: ['mean', 'std']
     vid_dur: ['count']
     mov_blinkdur: ['mean', 'std']
+    mov_freq_trem_freq: ['mean']
+    mov_freq_trem_index: ['mean']
+    mov_freq_trem_pindex: ['mean']
+    mov_amp_trem_freq: ['mean']
+    mov_amp_trem_index: ['mean']
+    mov_amp_trem_pindex: ['mean']
diff --git a/resources/features/raw_feature.yml b/resources/features/raw_feature.yml
index 982bf631..fc61ff99 100644
--- a/resources/features/raw_feature.yml
+++ b/resources/features/raw_feature.yml
@@ -1,11 +1,11 @@
 raw_feature:
     #error reason
     error_reason: error_reason
-    
+
     #Output range
     mov_headvel_start: 0
     mov_headvel_end: 200
-    
+
     #Facial markers
     hap_exp: fac_hapintsoft
     sad_exp: fac_sadintsoft
@@ -38,13 +38,13 @@ raw_feature:
     neu_exp_full: neu_exp_full
     cai_exp_full: cai_exp_full
     com_exp_full: fac_cominthard
-    
+
     #Facial asymmetry
     fac_AsymMaskMouth: fac_asymmaskmouth
     fac_AsymMaskEye: fac_asymmaskeye
     fac_AsymMaskEyebrow: fac_asymmaskeyebrow
     fac_AsymMaskCom: fac_asymmaskcom
-    
+
     #Facial landmark
     fac_LMK00disp: fac_LMK00disp
     fac_LMK01disp: fac_LMK01disp
@@ -114,7 +114,7 @@ raw_feature:
     fac_LMK65disp: fac_LMK65disp
     fac_LMK66disp: fac_LMK66disp
     fac_LMK67disp: fac_LMK67disp
-    
+
     #Facial action unit
     fac_AU01int: fac_AU01int
     fac_AU02int: fac_AU02int
@@ -151,7 +151,7 @@ raw_feature:
     fac_AU26pres: fac_AU26pres
     fac_AU28pres: fac_AU28pres
     fac_AU45pres: fac_AU45pres
-    
+
     #Verbal markers
     aco_int: aco_int
     aco_ff: aco_ff
@@ -184,7 +184,7 @@ raw_feature:
     aco_speakingtime: aco_speakingtime
     aco_numpauses: aco_numpauses
     aco_pausefrac: aco_pausefrac
-    
+
     #Movement markers
     head_vel: mov_headvel
     mov_blink_ear: mov_blink_ear
@@ -196,3 +196,18 @@ raw_feature:
     mov_Hpose_Yaw: mov_hposeyaw
     mov_Hpose_Roll: mov_hposeroll
     mov_Hpose_Dist: mov_hposedist
+    mov_freq_trem_freq: mov_freqtremfreq
+    mov_freq_trem_index: mov_freqtremindex
+    mov_freq_trem_pindex: mov_freqtrempindex
+    mov_amp_trem_freq: mov_amptremfreq
+    mov_amp_trem_index: mov_amptremindex
+    mov_amp_trem_pindex: mov_amptrempindex
+    fac_tremor_median_5: fac_tremor_median_5
+    fac_tremor_median_12: fac_tremor_median_12
+    fac_tremor_median_8: fac_tremor_median_8
+    fac_tremor_median_48: fac_tremor_median_48
+    fac_tremor_median_54: fac_tremor_median_54
+    fac_tremor_median_28: fac_tremor_median_28
+    fac_tremor_median_51: fac_tremor_median_51
+    fac_tremor_median_66: fac_tremor_median_66
+    fac_tremor_median_57: fac_tremor_median_57
diff --git a/resources/libraries/voice_tremor.praat b/resources/libraries/voice_tremor.praat
new file mode 100644
index 00000000..efeca086
--- /dev/null
+++ b/resources/libraries/voice_tremor.praat
@@ -0,0 +1,422 @@
+
+######################################
+# Global Settings
+######################################
+sourcedirec$ = "./"; directory of sounds to be analyzed
+minPi = 60; minimal Pitch [Hz]
+maxPi = 350; maximal Pitch [Hz]
+ts = 0.015; analysis time step [s]
+tremthresh = 0.15; minimal autocorr.-coefficient to assume "tremor"
+minTr = 1.5;  minimal tremor frequency [Hz]
+maxTr = 15; maximal tremor frequency [Hz]
+
+
+
+######################################
+# Sound (.wav) in, results (.txt) out
+######################################
+
+# record/load and select the sound to be analyzed!!!
+
+info$ = Info
+name$ = extractWord$(info$, "Object name: ")
+
+slength = Get total duration
+call ftrem
+call atrem
+
+echo 
+...{"FTrF": 'ftrf:2#', "ATrF":'atrf:2',"FTrI":'ftri:3',"ATrI":'atri:3',"FTrP":'ftrp:3',"ATrP":'atrp:3'}
+
+
+
+######################################
+# Frequency Tremor Analysis
+######################################
+procedure ftrem
+   To Pitch (cc)... ts minPi 15 yes 0.03 0.3 0.01 0.35 0.14 maxPi
+
+#Edit
+#pause
+
+# because PRAAT only runs "Subtract linear fit" if the last frame is "voiceless" (!?):
+# numberOfFrames+1 (1)
+   numberOfFrames = Get number of frames
+   x1 = Get time from frame number... 1
+   am_F0 = Get mean... 0 0 Hertz
+
+   Create Matrix... ftrem_0 0 slength numberOfFrames+1 ts x1 1 1 1 1 1 0
+   for i from 1 to numberOfFrames
+      select Pitch 'name$'
+      f0 = Get value in frame... i Hertz
+      select Matrix ftrem_0
+# write zeros to matrix where frames are voiceless
+      if f0 = undefined
+         Set value... 1 i 0
+      else
+         Set value... 1 i f0
+      endif
+   endfor
+
+# remove the linear F0 trend (F0 declination)
+   To Pitch
+   Subtract linear fit... Hertz
+   Rename... ftrem_0_lin
+
+# undo (1)
+   Create Matrix... ftrem 0 slength numberOfFrames ts x1 1 1 1 1 1 0
+   for i from 1 to numberOfFrames
+      select Pitch ftrem_0_lin
+      f0 = Get value in frame... i Hertz
+      select Matrix ftrem
+# write zeros to matrix where frames are voiceless
+      if f0 = undefined
+         Set value... 1 i 0
+      else
+         Set value... 1 i f0
+      endif
+   endfor
+
+   To Pitch
+
+# normalize F0-contour by mean F0
+   select Matrix ftrem
+   Formula... (self-am_F0)/am_F0
+
+# since zeros in the Matrix (unvoiced frames) become normalized to -1 but 
+# unvoiced frames should be zero (if anything)
+# write zeros to matrix where frames are voiceless
+   for i from 1 to numberOfFrames
+      select Pitch ftrem
+      f0 = Get value in frame... i Hertz
+      if f0 = undefined
+         select Matrix ftrem
+         Set value... 1 i 0
+      endif
+   endfor
+
+# to calculate autocorrelation (cc-method):
+   select Matrix ftrem
+   To Sound (slice)... 1
+# calculate Frequency of Frequency Tremor [Hz]
+   To Pitch (cc)... slength minTr 15 yes 0.01 tremthresh 0.01 0.35 0.14 maxTr
+   Rename... ftrem_norm
+
+   ftrf = Get mean... 0 0 Hertz
+
+# calculate Intensity Index of Frequency Tremor [%]
+   select Sound ftrem
+   plus Pitch ftrem_norm
+   To PointProcess (peaks)... yes no
+   Rename... Maxima
+   numberofMaxPoints = Get number of points
+   ftri_max = 0
+   noFMax = 0
+   for iPoint from 1 to numberofMaxPoints
+      select PointProcess Maxima
+      ti = Get time from index... iPoint
+      select Sound ftrem
+      ftri_Point = Get value at time... Average ti Sinc70
+      if ftri_Point = undefined
+         ftri_Point = 0
+         noFMax += 1
+      endif
+      ftri_max += abs(ftri_Point)
+   endfor
+
+select Sound ftrem
+plus PointProcess Maxima
+#Edit
+#pause
+   
+# ftri_max:= (mean) procentual deviation of F0-maxima from mean F0 at ftrf
+   numberofMaxima = numberofMaxPoints - noFMax
+   ftri_max = 100 * ftri_max/numberofMaxima
+
+   select Sound ftrem
+   plus Pitch ftrem_norm
+   To PointProcess (peaks)... no yes
+   Rename... Minima
+   numberofMinPoints = Get number of points
+   ftri_min = 0
+   noFMin = 0
+   for iPoint from 1 to numberofMinPoints
+      select PointProcess Minima
+      ti = Get time from index... iPoint
+      select Sound ftrem
+      ftri_Point = Get value at time... Average ti Sinc70
+      if ftri_Point = undefined
+         ftri_Point = 0
+         noFMin += 1
+      endif
+      ftri_min += abs(ftri_Point)
+   endfor
+
+select Sound ftrem
+plus PointProcess Minima
+#Edit
+#pause
+
+
+# ftri_min:= (mean) procentual deviation of F0-minima from mean F0 at ftrf
+   numberofMinima = numberofMinPoints - noFMin
+   ftri_min = 100 * ftri_min/numberofMinima
+
+   ftri = (ftri_max + ftri_min) / 2
+   
+   ftrp = ftri * ftrf/(ftrf+1)
+
+# uncomment to inspect frequnecy tremor objects:
+# pause
+
+   select Pitch ftrem
+# uncomment if only frequency tremor is to be analyzed:
+#   plus Pitch 'name$'
+   plus Matrix ftrem_0
+   plus Pitch ftrem_0
+   plus Pitch ftrem_0_lin
+   plus Matrix ftrem
+   plus Sound ftrem
+   plus Pitch ftrem_norm
+   plus PointProcess Maxima
+   plus PointProcess Minima
+   Remove
+
+endproc
+
+
+######################################
+# Amplitude Tremor Analysis
+######################################
+procedure atrem
+   select Sound 'name$'
+# uncomment if only amplitude tremor is to be analyzed:
+#   To Pitch (cc)... ts minPi 15 yes 0.03 0.3 0.01 0.35 0.14 maxPi
+#   select Sound 'name$'
+   plus Pitch 'name$'
+   To PointProcess (cc)
+   select Sound 'name$'
+   plus PointProcess 'name$'_'name$'
+
+# amplitudes are integrals of intensity over periods -- not intensity maxima
+   To AmplitudeTier (period)... 0 0 0.0001 0.02 1.7
+
+#Edit
+#pause
+
+# from here on out: prepare to autocorrelate AmplitudeTier-data
+# sample AmplitudeTier at (constant) rate ts
+   numbOfAmpPoints = Get number of points
+   first_ampP = Get time from index... 1
+   last_ampP = Get time from index... numbOfAmpPoints
+
+# to be able to -- automatically -- read Amp. values...
+   Down to TableOfReal
+
+   select Pitch 'name$'
+   frameNo1 = Get frame number from time... first_ampP
+   hiframe1 = ceiling(frameNo1)
+   t_hiframe1 = Get time from frame number... hiframe1
+
+   frameNoN = Get frame number from time... last_ampP
+   loframeN = floor(frameNoN)
+
+# number of Amp. points if (re-)sampled at ts
+   numbOfPoints_neu = loframeN - hiframe1 + 1
+
+# to enable autocorrelation of the Amp.-contour: ->Matrix->Sound
+
+   Create Matrix... atrem_nlc 0 slength numbOfPoints_neu+1 ts t_hiframe1 1 1 1 1 1 2
+# get the mean of the amplitude contour in time windows of constant duration
+   for point_neu from 1 to numbOfPoints_neu
+      t = (point_neu-1) * ts + t_hiframe1
+      tl = t - ts/2
+      tu = t + ts/2
+
+      select AmplitudeTier 'name$'_'name$'_'name$'
+      loil = Get low index from time... tl
+      hiil = Get high index from time... tl
+      loiu = Get low index from time... tu
+      hiiu = Get high index from time... tu
+
+      select TableOfReal 'name$'_'name$'_'name$'
+      if loil = 0
+         lotl = 0; time before the first amp. point
+         druck_lol = Get value... hiil 2; amplitude value before the first amp. point
+      else
+         lotl = Get value... loil 1; time value of Amp.Point before tl in the PointProcess [s]
+         druck_lol = Get value... loil 2; amplitude value before tl in the PointProcess [Pa, ranged from 0 to 1]
+      endif
+
+      hitl = Get value... hiil 1
+      druck_hil = Get value... hiil 2; amplitude value after tl in the PointProcess
+
+      lotu = Get value... loiu 1
+      druck_lou = Get value... loiu 2; amplitude value before tu in the PointProcess
+
+      if hiiu = numbOfAmpPoints + 1
+         hitu = slength; time after the last amp. point
+         druck_hiu = Get value... hiil 2; amplitude value after the last amp. point
+      else
+         hitu = Get value... hiiu 1; time value after tu in the PointProcess
+         druck_hiu = Get value... hiiu 2; amplitude value after tu in the PointProcess
+      endif
+
+      nPinter = loiu - loil; = hiiu - hiil; number of amp.-points between tl and tu
+      if nPinter > 0
+         itinter = 0
+         tinter = 0
+         druck_tin = 0
+         deltat = 0
+         for iinter from 1 to nPinter
+            hilft = itinter
+            itinter = Get value... loil+iinter 1
+            idruck_tin = Get value... loil+iinter 2
+
+            ideltat = itinter - hilft
+            druck_tin += idruck_tin * ideltat 
+            tinter += itinter
+            deltat += ideltat
+         endfor
+
+         tin = tinter/nPinter
+         druck_tin = druck_tin/deltat
+      endif
+
+      druck_tl = ((hitl-tl)*druck_lol + (tl-lotl)*druck_hil) / (hitl-lotl)
+      druck_tu = ((hitu-tu)*druck_lou + (tu-lotu)*druck_hiu) / (hitu-lotu)
+
+      if nPinter = 0; loil = loiu; hiil = hiiu
+         druck_mean = (druck_tl + druck_tu) / 2
+      else
+         druck_mean = ((tin-tl)*(druck_tl + druck_tin)/2 + (tu-tin)*(druck_tin + druck_tu)/2) / (tu-tl)
+      endif
+
+      select Matrix atrem_nlc
+      Set value... 1 point_neu druck_mean
+   endfor
+
+   To Pitch
+   am_Int = Get mean... 0 0 Hertz
+
+# because PRAAT classifies frequencies in Pitch objects <=0 as "voiceless" and 
+# therefore parts with extreme INTENSITIES would be considered as "voiceless"
+# (irrelevant) after "Subtract linear fit" (1)
+# "1" is added to the original Pa-values (ranged from 0 to 1)
+   select Matrix atrem_nlc
+   Formula... self+1
+
+# because PRAAT only runs "Subtract linear fit" if the last frame is "voiceless"...?(2)
+   Set value... 1 numbOfPoints_neu+1 0
+
+# remove the linear amp.-trend (amplitude declination)
+#Formula... self*1000; better for viewing
+   To Pitch
+   Rename... hilf_lincorr
+   Subtract linear fit... Hertz
+   Rename... atrem
+
+# undo (1)...
+   To Matrix
+   Formula... self-1
+
+# normalize Amp. contour by mean Amp.
+   Formula... (self-am_Int)/am_Int
+
+# remove last frame, undo (2)
+   Create Matrix... atrem_besser 0 slength numbOfPoints_neu ts t_hiframe1 1 1 1 1 1 0
+   for point_neu from 1 to numbOfPoints_neu
+      select Matrix atrem
+      spring = Get value in cell... 1 point_neu
+      select Matrix atrem_besser
+      Set value... 1 point_neu spring
+   endfor
+
+# to calculate autocorrelation (cc-method)
+   To Sound (slice)... 1
+# calculate Frequency of Ampitude Tremor [Hz]
+   To Pitch (cc)... slength minTr 15 yes 0.01 tremthresh 0.01 0.35 0.14 maxTr
+   Rename... atrem_norm
+
+   atrf = Get mean... 0 0 Hertz
+
+# calculate Intensity Index of Amplitude Tremor [%]
+   select Sound atrem_besser
+   plus Pitch atrem_norm
+   To PointProcess (peaks)... yes no
+   Rename... Maxima
+   numberofMaxPoints = Get number of points
+   atri_max = 0
+   noAMax = 0
+   for iPoint from 1 to numberofMaxPoints
+      select PointProcess Maxima
+      ti = Get time from index... iPoint
+      select Sound atrem_besser
+      atri_Point = Get value at time... 0 ti Sinc70
+      if atri_Point = undefined
+         atri_Point = 0
+         noAMax += 1
+      endif
+      atri_max += abs(atri_Point)
+   endfor
+
+select Sound atrem_besser
+plus PointProcess Maxima
+#Edit
+#pause
+
+# atri_max:= (mean) procentual deviation of Amp. maxima from mean Amp.[Pa] at atrf
+   numberofMaxima = numberofMaxPoints - noAMax
+   atri_max = 100 * atri_max / numberofMaxima
+
+   select Sound atrem_besser
+   plus Pitch atrem_norm
+   To PointProcess (peaks)... no yes
+   Rename... Minima
+   numberofMinPoints = Get number of points
+   atri_min = 0
+   noAMin = 0
+   for iPoint from 1 to numberofMinPoints
+      select PointProcess Minima
+      ti = Get time from index... iPoint
+      select Sound atrem_besser
+      atri_Point = Get value at time... 0 ti Sinc70
+      if atri_Point = undefined
+         atri_Point = 0
+         noAMin += 1
+      endif
+      atri_min += abs(atri_Point)
+   endfor
+
+select Sound atrem_besser
+plus PointProcess Minima
+#Edit
+#pause
+
+# atri_min:= (mean) procentual deviation of Amp. minima from mean Amp.[Pa] at atrf
+   numberofMinima = numberofMinPoints - noAMin
+   atri_min = 100 * atri_min / numberofMinima
+
+   atri = (atri_max + atri_min) / 2
+
+   atrp = atri * atrf/(atrf+1)
+
+# uncomment to inspect amplitude tremor objects:
+# pause
+
+   select Pitch 'name$'
+   plus PointProcess 'name$'_'name$'
+   plus AmplitudeTier 'name$'_'name$'_'name$'
+   plus TableOfReal 'name$'_'name$'_'name$'
+   plus Matrix atrem_nlc
+   plus Pitch atrem_nlc
+   plus Pitch hilf_lincorr
+   plus Pitch atrem
+   plus Matrix atrem
+   plus Matrix atrem_besser
+   plus Sound atrem_besser
+   plus Pitch atrem_norm
+   plus PointProcess Maxima
+   plus PointProcess Minima
+   Remove
+endproc
\ No newline at end of file