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Unilateral crosstalk cancellation in normal hearing 1 participants using bilateral bone transducers

Mcleod, Robert ORCID: and Culling, John ORCID: 2020. Unilateral crosstalk cancellation in normal hearing 1 participants using bilateral bone transducers. Journal of the Acoustical Society of America 148 (1) , 63. 10.1121/10.0001529

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It is possible to psychophysically measure the phase and level of bone conducted sound at the cochleae using two bone transducers (BTs) [Mcleod and Culling (2019). J. Acoust Soc. Am. 146, 3295 − 3301]. The present work uses such measurements to improve masked thresholds by using the phase and level values to create a unilateral crosstalk cancellation system. To avoid changes in the coupling of the BT to the head, testing of tone and speech reception thresholds with and without crosstalk cancellation had to be performed immediately following the measurements without adjustment of the BT. To achieve this, a faster measurement method was created. Previously measured phase and level results were interpolated to predict likely results for new test frequencies. Testing time to collect the necessary phase and level values was reduced to approximately 15 min by exploiting listeners' previous measurements. The inter-cochlear phase difference and inter-cochlear level difference were consistent between experimental sittings in the same participant but different between participants. Addition of a crosstalk cancellation signal improved tone and speech reception thresholds for tones/speech presented with one BT and noise presented on the other by an average of 12.1 dB for tones and 13.67 dB for speech.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Publisher: Acoustical Society of America
ISSN: 0001-4966
Date of First Compliant Deposit: 23 June 2020
Date of Acceptance: 22 June 2020
Last Modified: 20 May 2023 09:02

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