23 lines
819 B
Markdown
23 lines
819 B
Markdown
---
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id: fundamental-frequency
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title: Fundamental Frequency
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---
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The fundamental frequency (f<sub>0</sub>) is the lowest frequency of a periodic waveform, measured in Hertz (Hz). It is the greatest common divisor of all the frequency components contained in a signal.[^1]
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[^1]: https://en.wikipedia.org/wiki/Fundamental_frequency
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## Raw Variables
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| Variable | Description |
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| ----------- | ----------- |
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| `aco_ff` | **Fundamental frequency.** Frame-wise fundamental frequency values in Hz. |
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## Derived Variables
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| Variable | Description |
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| ----------- | ----------- |
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| `aco_ff_mean` | **Fundamental frequency mean.** Mean of aco_ff across the audio file. |
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| `aco_ff_std` | **Fundamental frequency standard deviation.** Standard deviation of aco_ff across the audio file. |
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