bramslow2004_htl
Excitation pattern and hearing threshold levels considering an audiogram in free field

Usage:

[E_R, E_TQ] = bramslow2004_htl(In_FrmSize, In_SampF, TransFact, Widen, AGLoss, RET4153, AGFs_E, NoChan, E_Beg, E_End);
[E_R, E_TQ] = bramslow2004_htl(..);

Input parameters:

`In_FrmSize`	Input framesize (in samples).
`In_SampF`	Input sampling rate (in Hz).
`TransFact`	String specifying the fixed frequency response equalization applied to the input spectrum (after correcting for coupler response) before passing it through the auditory filterbank: `'ZWICKA0'`: Zwicker a0 transmission factor. `'ISO100N'`: 100-phone equal-loudness contours. `'ISO100M'`: 100-phone equal-loudness contours, modified to be flat below 1 kHz.
`Widen`	Flag for filter widening dependent on level. If true, the filter will be widened.
`AGLoss`	Audiogram (in dB HL) specified at frequencies [125 250 500 750 1000 1500 2000 3000 4000 6000 8000 10000 12500] Hz.
`RET4153`	ISO 389 thresholds in dB SPL as measured on the ear-simulator (4153) coupler. Specified at the same frequencies as for AGLoss.
`AGFs_E`	Audiogram frequencies on the ERB scale (in Cams).
`NoChan`	Number of output channels (equally distributed on the ERB scale).
`E_Beg`	Lowest ERB rate considered (in Cams, typically 3 Cams).
`E_End`	Highest ERB rate considered (in Cams, typically 32 Cams).

Output parameters:

`E_R`	Excitation pattern (in dB) in ERB bands for the audiogram.
`E_TQ`	Power of the excitation (in dB) in ERB bands.
`HTLL`	Hearing threshold levels interpolated along the ERB scale to obtain SPL (in dB) of the 4152 coupler. Not used in the current model.

Description:

See also other parameters as in arg_bramslow2004.

References:

L. Bramsløw Nielsen. An Auditory Model with Hearing Loss. Technical report, Eriksholm Research Centre, Snekkersten, 1993. [ .pdf ]

L. Bramsløw. An objective estimate of the perceived quality of reproduced sound in normal and impaired hearing. Acta Acustica united with Acustica, 90(6):1007--1018, 2004. [ http ]

L. Bramsløw. An auditory loudness model with hearing loss. In Baltic-Nordic Acoustics Meeting, pages 318--323, 2024. [ .html ]

THE AUDITORY MODELING TOOLBOX