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Peter K.
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α = exp (-2πFΔt)$\alpha = \exp (-2\pi F\Delta t)$, where Δt$\Delta t$ is the sampling period of the sound.
The

The frequency F$F$ above which the spectral slope will increase by 6 dB/octave.[1]

Actually, the pre-emphasis filter is just a 1-order FIR filter[2].

[1] http://www.fon.hum.uva.nl/praat/manualslope will increase by 6 dB/Sound__Filter__pre-emphasis____octave.html
[2]  

https://ccrma.stanford.edu/~jos/fp/FIR_Transfer_Function.htmlActually, the pre-emphasis filter is just a 1-order FIR filter.

α = exp (-2πFΔt), where Δt is the sampling period of the sound.
The frequency F above which the spectral slope will increase by 6 dB/octave.[1]

Actually, the pre-emphasis filter is just a 1-order FIR filter[2].

[1] http://www.fon.hum.uva.nl/praat/manual/Sound__Filter__pre-emphasis____.html
[2] https://ccrma.stanford.edu/~jos/fp/FIR_Transfer_Function.html

$\alpha = \exp (-2\pi F\Delta t)$, where $\Delta t$ is the sampling period of the sound.

The frequency $F$ above which the spectral slope will increase by 6 dB/octave. 

Actually, the pre-emphasis filter is just a 1-order FIR filter.

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Zz Tux
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α = exp (-2πFΔt), where Δt is the sampling period of the sound.
The frequency F above which the spectral slope will increase by 6 dB/octave.[1]

Actually, the pre-emphasis filter is just a 1-order FIR filter[2].

[1] http://www.fon.hum.uva.nl/praat/manual/Sound__Filter__pre-emphasis____.html
[2] https://ccrma.stanford.edu/~jos/fp/FIR_Transfer_Function.html