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Lateralization of high frequency pure tones with interaural phase difference and bone conduction

Record type: Article

This study tested the prediction that interaural phase differences (IPDs) are converted to interaural level differences (ILDs) with bilateral bone-conduction stimulation due to the effects of acoustic interference arising from transcranial transmission. Seven normal-hearing listeners judged the lateral position of 3000-6000-Hz pure tones, presented via bone vibrators on the mastoids, as a function of IPD. Evidence for lateralization was obtained in five listeners despite humans being insensitive to IPD in pure tones at these frequencies. The direction of lateralization depended on frequency, as well as IPD, for three listeners. It is argued that these findings are consistent with the conversion of external IPD to internal ILD during transcranial transmission. Inter-individual variation in lateralization was apparent and no evidence of lateralization was found in two listeners at the frequency tested, which may reflect, at least in part, inter-individual variation in transcranial transmission properties. The notion that external IPD within the waveform fine-structure at high-frequencies does not influence localization with air conduction may not apply to bone conduction due to the acoustic interference effects.

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Citation

Rowan, Daniel and Gray, Michelle (2008) Lateralization of high frequency pure tones with interaural phase difference and bone conduction International Journal of Audiology, 47, (7), pp. 404-411. (doi:10.1080/14992020802006055).

More information

Published date: January 2008
Keywords: sound localization, bone conduction, bone-anchored, hearing aid
Organisations: Human Sciences Group

Identifiers

Local EPrints ID: 63669
URI: http://eprints.soton.ac.uk/id/eprint/63669
PURE UUID: 8c77e9b3-5d41-43da-b505-9515f6969bad
ORCID for Daniel Rowan: ORCID iD orcid.org/0000-0002-7190-9997

Catalogue record

Date deposited: 23 Oct 2008
Last modified: 17 Jul 2017 14:16

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Contributors

Author: Daniel Rowan ORCID iD
Author: Michelle Gray

University divisions

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