Investigating low-frequency compression using the Grid method

Michal Fereczkowski, Torsten Dau, Ewen MacDonald

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    There is an ongoing discussion about whether the amount of cochlear compression in humans at low frequencies (below 1 kHz) is as high as that at higher frequencies. It is controversial whether the compression affects the slope of the off-frequency forward masking curves at those frequencies.
    Here, the Grid method with a 2-interval 1-up 3-down tracking rule was applied to estimate forward masking curves at two characteristic frequencies: 500 Hz and 4000 Hz. The resulting curves and the
    corresponding basilar membrane input-output (BM I/O) functions were found to be comparable to those reported in literature. Moreover, slopes of the low-level portions of the BM I/O functions estimated at 500 Hz were examined, to determine whether the 500-Hz off-frequency forward masking curves were affected by compression. Overall, the collected data showed a trend confirming the compressive behaviour. However, the analysis was complicated by unexpectedly steep portions of the collected on- and offfrequency forward masking curves.
    Original languageEnglish
    Title of host publicationProceedings of ISAAR 2015
    EditorsS. Santurette, T. Dau, J. C. Dalsgaard, L. Tranebjærg, T. Andersen
    Publication date2016
    ISBN (Print)978-87-990013-5-4
    Publication statusPublished - 2016
    Event5th International Symposium on Auditory and Audiological Research - Nyborg, Denmark
    Duration: 26 Aug 201528 Aug 2015
    Conference number: 5


    Conference5th International Symposium on Auditory and Audiological Research
    Internet address


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