Why is pre-emphasis (i.e. passing the speech signal through a first order high pass filter) required in speech processing and how does it work? - Quora
Impact of Analog and Digital Pre-emphasis on the Signal-to- Noise Ratio of Bandwidth-limited Optical Transceivers
![finite impulse response - Pre-emphasis filter for speech recognition - Signal Processing Stack Exchange finite impulse response - Pre-emphasis filter for speech recognition - Signal Processing Stack Exchange](https://i.stack.imgur.com/XgrHI.png)
finite impulse response - Pre-emphasis filter for speech recognition - Signal Processing Stack Exchange
![Time constant and cutoff frequency calculator upper and lower corner frequency RIAA frequency response break RC pad tau and f RIAA NAB CCIR DIN FM conversion cut-off cut off EQ filter emphasis Time constant and cutoff frequency calculator upper and lower corner frequency RIAA frequency response break RC pad tau and f RIAA NAB CCIR DIN FM conversion cut-off cut off EQ filter emphasis](http://www.sengpielaudio.com/Emphasis-Pre-De.gif)