Gammatone filter

From Wikipedia, the free encyclopedia

Figure 1: A gammatone impulse response.
Figure 1: A gammatone impulse response.

A gammatone filter is an impulse response filter used in many models of the auditory system. It is the most widely used example of auditory filters. It is described by the equation

g(t) = at^{n-1}\cos(2\pi ft + \phi) e^{-2\pi bt}, \,

where f is the frequency, φ is the phase of the carrier, a is the amplitude, n is the filter's order, b is the filter's bandwidth, and t is time.

[edit] References

Slaney, Malcolm, "An Efficient Implementation of the Patterson-Holdsworth Auditory Filter Bank," Apple Computer Technical Report #35, Perception Group—Advanced Technology Group (1993).

[edit] External links

 This neuroscience article is a stub. You can help Wikipedia by expanding it.