[PD] changing volume depending on frequency

[Marko Timlin]

I am working on a patch where I want to change the volume of the sound depending of the frequency it´s played at. 
as we hear frequency logarithimically my idea is:
the higher the pitch the more silent the volume and the lower the pitch the higher the volume. and all that according to the logarithmic fashion in which the human auditory system processes frequencies, as we do not perceive them with equal sensitivity.

any ideas???

thanks,
m.