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Rudy Haryanto
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---
id: glottal-to-noise-excitation-ratio
title: Glottal-to-noise Excitation Ratio (GNE)
---
Glottal-to-noise excitation ratio, as introduced by Michaelis and colleagues[^1], is an indirect measure of breathiness, indicating whether a “given voice signal originates from vibrations in the vocal folds or from turbulent noise generated in the vocal tract.”
[^1]: Michaelis, D., Gramss, T., & Strube, H. W. (1997). Glottal-to-noise excitation ratio–a new measure for describing pathological voices. Acta Acustica united with Acustica, 83(4), 700-706.
## Raw Variables
| Variable | Description |
| ----------- | ----------- |
| `aco_gne` | **Glottal-to-noise excitation ratio.** Frame-wise measurements of glottal-to-noise excitation ratio. |
## Derived Variables
| Variable | Description |
| ----------- | ----------- |
| `aco_gne_mean` | **Glottal-to-noise excitation ratio mean.** Mean of `aco_hnr` across the audio file. |
| `aco_gne_std` | **Glottal-to-noise excitation ratio standard deviation.** Standard deviation of `aco_gne` across the audio file. |