22 lines
842 B
Markdown
22 lines
842 B
Markdown
---
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id: harmonics-to-noise-ratio
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title: Harmonics-to-noise Ratio (HNR)
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---
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The harmonics-to-noise ratio (HNR), a common measurement of aspiration, quantifies the amount of additive noise in the voice signal.[^1]
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[^1]: Ferrand, C. T. (2002). Harmonics-to-noise ratio: an index of vocal aging. Journal of voice, 16(4), 480-487.
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## Raw Variables
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| Variable | Description |
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| ----------- | ----------- |
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| `aco_hnr` | **Harmonics-to-noise ratio.** Frame-wise measurements of harmonics-to-noise ratio. |
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## Derived Variables
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| Variable | Description |
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| ----------- | ----------- |
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| `aco_hnr_mean` | **Harmonics-to-noise ratio mean.** Mean of `aco_hnr` across the audio file. |
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| `aco_hnr_stdev` | **Harmonics-to-noise ratio standard deviation.** Standard deviation of `aco_hnr` across the audio file. |
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