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8/18/03 Tan & Carney (JASA 2003) AN3 model 
also available from the <a href='http://earlab.bu.edu'>EarLab</a> website,
a digital warehouse for auditory models and data.

NOTE: This code was used to generate the figures in 
"A Phenomenological Model for the Responses of Auditory-
Nerve Fibers. II. Nonlinear Tuning with a Frequency Glide."
Qing Tan and Laurel H. Carney, JASA 2003 114:2007-2020.

{Internally, we refer to this as "AN3" -> Carney, 1993 is
"AN1" and Zhang et al., 2001 is "AN2".}


How to compile the files:

(1) Uncompress all the files into the same directory 

(2) Open Matlab and go to that directory 

(3) Type the following command in Matlab:
	mex anmod3m.c

How to run it:

(1) Use the following Matlab command format:

sout=anmod3m(cf, inputsound);

where inputsound is a vector containing the stimulus waveform,
and sout is the returned synapse output, with same length as 
the inputsound vector.
    The units of inputsound MUST be in Pascals (because this 
is a nonlinear model, it is critical that the signal is provided
in the proper units.)
    The units of the synapse output are in "spikes/sec" (for each 
20 usec bin) - to generate spikes, you can use this signal to 
drive a non-homogenous Poisson Process (see Zhang et al., JASA, 
2001, for example). The Sout signal itself can be compared to 
the PST histogram of an AN fiber (note however that refractoriness 
is not included in this response.)

(2) The program was written using a 50kHz sampling rate.
Therefore, "inputsound" should be created using a 50 kHz sampling 
rate. You can change the sampling rate by changing
the value of tdres in anmod3m.h. However, other sampling rates 
have not been tested and may generate unexpected results.

(3) There are 2 simple test m-files in this directory:
AN3_test_tone.m and AN3_test_click.m  run the model for a 1 kHz CF 
fiber and plot out tone and click responses at several SPLs.

Thanks for your interest in this model.

Good luck!
	
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