THE AUDITORY MODELING TOOLBOX

Applies to version: 1.6.0

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bramslow2004_ucl
Excitation patterns at uncomfortable levels (UCLs)

Usage:

E_UCL = bramslow2004_ucl(In_FrmSize, In_SampF, TransFact, NoChan, Widen, AG_UCL, AGLoss, RET4153, AGFs_E, E_Beg, E_End, E_B)

Input parameters:

In_FrmSize Input framesize (in samples).
fs 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 be to flat below 1 kHz.
NoChan Number of output channels (equally distributed on the ERB scale).
Widen Flag for filter widening dependent on level. If true, the filter will be widened.
AG_UCL Audiogram with uncomfortable levels (UCLs) (in dB HL). Specified at frequencies: [125 250 500 750 1000 1500 2000 3000 4000 6000 8000 10000 12500]
AGLoss Audiogram with the hearing loss (in dB HL). Specified at the same frequencies as for AG_UCL.
RET4153 SPL thresholds (in dB) as specified by ISO 389 on the ear simulator (B&K 4153) coupler. Specified at the same frequencies as for AG_UCL.
AGFs_E Audiogram frequencies (in Cams, 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_UCL Excitation pattern (in dB) in ERB bands for the provided UCL.

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 ]