THE AUDITORY MODELING TOOLBOX

Applies to version: 1.6.0

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demo_hohmann2002
Demonstration of the invertible Gammatone filterbank hohmann2002

Description:

This demonstration shows how to use the invertible Gammatone filterbank from Hohmann (2002).

The code consists of three parts:

  • Part I shows how to create a filter using hohmann2002_filter and process a sound using hohmann2002_process.
  • Part II shows how to create a filterbank using hohmann2002 and analyze the frequency responses using hohmann2002_freqz.
  • Part III shows how to use the invertible filterbank by applying hohmann2002_synth.
demo_hohmann2002_1.png

Part I: Impulse response of a 4-th-order Gammatone filter with a center frequency of 1000 Hz and a 3-dB-bandwidth of 100 Hz.

demo_hohmann2002_2.png

Part I: Frequency response of the above filter.

demo_hohmann2002_3.png

Part II: Frequency responses of the individual filters of a Gammatone filterbank.

demo_hohmann2002_4.png

Part III: Impulse response of the full inverted system, i.e., analysis filterbank followed by the synthesis filterbank.

demo_hohmann2002_5.png

Part III: Frequency response of the above system.

References:

V. Hohmann. Frequency analysis and synthesis using a gammatone filterbank. Acta Acustica united with Acoustica, 88(3):433--442, 2002.

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