Hi Andrew,
My experience is that for making this type of stimuli the chirp function in matlab is as useless as an ashtray on a motorbike. The phase delay formulas from the article should be able
to be used. The derived signal can then be checked against the phase response and written to an audio file.
I’ve hit some rather infuriating technical issues trying to calibrate bandpass versions of such. Feel free to reach out and I can share a script for deriving the chirps described in
Elberling et al., 2007, though it is not checked and poorly documented. . .
Good luck!
David
David Jackson Morris, PhD, LTCL
Associate Professor/Lektor
University of Copenhagen/Københavns Universitet
Speech Pathology and Audiology/Audiologopædi
Department of Nordic Studies and Linguistics/Institut for Nordiske Studier og Sprogvidenskab
Emil Holms Kanal 2
2300 København S
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Dato: onsdag den 18. januar 2023 kl. 06.13
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Emne: Chirps with Cochlear Delay
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Hello Auditory List,
I have been working on a masked ABR experiment and wanted to generate a chirp that compensated for basilar membrane traveling wave delay, akin to what was discussed in the 2010 Chertoff (https://asa.scitation.org/doi/full/10.1121/1.3372756)
and 2004 Fobel & Dau (https://asa.scitation.org/doi/pdf/10.1121/1.1787523)
articles. While the articles do include the formulas that they used, I am not sure how to actually apply said formulas in Matlab, or if they are compatible with the built-in chirp function that Matlab has. Does anyone have any advice for generating them in
our script?
Thank you,
Andrew
--
Andrew Levitsky
Research Associate
Carnegie Mellon Neuroscience Institute
alevitsk@xxxxxxxxxxxxxx
M: (908) 420-9917