CHEN2011
Fast excitation pattern estimation

Usage:

[Ldn,E,Cam,CF] = chen2011(inputF,inputLdB)

Input parameters:

`inputF`	vector of input frequency values
`inputLdB`	vector of input level

Output parameters:

`Ldn`	loudness
`E`	excitation at the output of the passive filter
`Cam`	ERB-number in Cams (Glasberg and Moore, 1990; Moore, 2003)
`CF`	center frequency of auditory filters

Description:

chen2011 provides a fast way of loudness estimation.

Optional parameters:

`'HLcf',HLcf`	parameters to simulate hearing loss: audiogram frequencies
`'HLohcdB0',HLohcdB0`	parameters to simulate hearing loss: OHC loss at audiogram frequencies
`'HLihcdB0',HLihcdB0`	parameters to simulate hearing loss: IHC loss at audiogram frequencies
`'cambin',cambin`	spacing [ERB] between successive auditory filter CFs
`'flow',flow`	lowest center frequency of an auditory filter
`'fhigh',fhigh`	highest center frequency of an auditory filter

Moreover, the model supports 3 flags for outer ear correction ('FreeField', 'PDR10', 'Eardrum').

References:

Z. Chen, G. Hu, B. R. Glasberg, and C. Moore, Brian. A new model for calculating auditory excitation patterns and loudness for cases of cochlear hearing loss. The Journal of the Acoustical Society of America, 282(1), 2011.

B. R. Glasberg and B. C. J. Moore. A Model of Loudness Applicable to Time-Varying Sounds. J. Audio Eng. Soc, 50(5):331--342, 2002. [ http ]

B. C. J. Moore, B. R. Glasberg, and T. Baer. A Model for the Prediction of Thresholds, Loudness, and Partial Loudness. J. Audio Eng. Soc, 45(4):224--240, 1997. [ http ]