add private module to create model object for acoustics api

opendbm/api_lib/verbal_acoustics/_pause_characteristics.py

@@ -0,0 +1,20 @@
+import pandas as pd
+
+from opendbm.api_lib.model import AudioModel
+from opendbm.dbm_lib import run_pause_segment
+
+
+class PauseCharacteristics(AudioModel):
+    def __init__(self):
+        super().__init__()
+        self._params = [
+            "aco_totaltime",
+            "aco_speakingtime",
+            "aco_numpauses",
+            "aco_pausetime",
+            "aco_pausefrac",
+        ]
+
+    @AudioModel.prep_func
+    def _fit_transform(self, path, **kwargs):
+        return run_pause_segment(path, ".", self.r_config, save=False)