Investigate SOMA, port from Matlab?

[rcrowder]

https://github.com/audioplastic/soma

The SOMA model simulates the auditory periphery as a hierarchy of four discrete modules.

• At the base level there is the stimulus module. Given an input stimulus input as a column vector time series along with a sample rate, this module is aware of the length of the stimulus, a time axis, and other statistics about the time series.
• Next, there is an outer-middle ear module that simulates this part of the periphery as a broad band-pass filter.
• Cochlear frequency decomposition occurs next. This is simulated by a bank of gammatone filters.
• The final stage is a crude inner hair cell model simulating mechanical to neural transduction. This is achieved by half-wave rectification and low pass filtering of the signal within each cochlear frequency band. The signal is also passed through a compressive non-linearity at this stage to simulate the lumped compressive action of the cochlear filtering and neural transduction in one hit.