A novel binaural pitch elicited by phase-modulated noise: MEG and psychophysical observations

Caroline Witton, Arjan Hillebrand, Paul L. Furlong, G. Bruce Henning

Research output: Contribution to journalArticle

Abstract

Binaural pitches are auditory percepts that emerge from combined inputs to the ears but that cannot be heard if the stimulus is presented to either ear alone. Here, we describe a binaural pitch that is not easily accommodated within current models of binaural processing. Convergent magnetoencephalography (MEG) and psychophysical measurements were used to characterize the pitch, heard when band-limited noise had a rapidly changing interaural phase difference. Several interesting features emerged: First, the pitch was perceptually lateralized, in agreement with the lateralization of the evoked changes in MEG spectral power, and its salience depended on dichotic binaural presentation. Second, the frequency of the pure tone that matched the binaural pitch lay within a lower spectral sideband of the phase-modulated noise and followed the frequency of that sideband when the modulation frequency or center frequency and bandwidth of the noise changed. Thus, the binaural pitch depended on the processing of binaural information in that lower sideband.
LanguageEnglish
Pages1271-1281
Number of pages11
JournalCerebral Cortex
Volume22
Issue number6
Early online date10 Aug 2011
DOIs
Publication statusPublished - Jun 2012

Fingerprint

Magnetoencephalography
Noise
Ear
Automatic Data Processing

Keywords

  • beamforming
  • binaural pitch
  • Heschl’s gyrus
  • lateralization
  • MEG
  • planum temporale

Cite this

@article{db205801d0b74922960e542f9d3d8a6e,
title = "A novel binaural pitch elicited by phase-modulated noise: MEG and psychophysical observations",
abstract = "Binaural pitches are auditory percepts that emerge from combined inputs to the ears but that cannot be heard if the stimulus is presented to either ear alone. Here, we describe a binaural pitch that is not easily accommodated within current models of binaural processing. Convergent magnetoencephalography (MEG) and psychophysical measurements were used to characterize the pitch, heard when band-limited noise had a rapidly changing interaural phase difference. Several interesting features emerged: First, the pitch was perceptually lateralized, in agreement with the lateralization of the evoked changes in MEG spectral power, and its salience depended on dichotic binaural presentation. Second, the frequency of the pure tone that matched the binaural pitch lay within a lower spectral sideband of the phase-modulated noise and followed the frequency of that sideband when the modulation frequency or center frequency and bandwidth of the noise changed. Thus, the binaural pitch depended on the processing of binaural information in that lower sideband.",
keywords = "beamforming, binaural pitch, Heschl’s gyrus, lateralization, MEG, planum temporale",
author = "Caroline Witton and Arjan Hillebrand and Furlong, {Paul L.} and Henning, {G. Bruce}",
year = "2012",
month = "6",
doi = "10.1093/cercor/bhr192",
language = "English",
volume = "22",
pages = "1271--1281",
journal = "Cerebral Cortex",
issn = "1047-3211",
publisher = "Oxford University Press",
number = "6",

}

A novel binaural pitch elicited by phase-modulated noise : MEG and psychophysical observations. / Witton, Caroline; Hillebrand, Arjan; Furlong, Paul L.; Henning, G. Bruce.

In: Cerebral Cortex, Vol. 22, No. 6, 06.2012, p. 1271-1281.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A novel binaural pitch elicited by phase-modulated noise

T2 - Cerebral Cortex

AU - Witton, Caroline

AU - Hillebrand, Arjan

AU - Furlong, Paul L.

AU - Henning, G. Bruce

PY - 2012/6

Y1 - 2012/6

N2 - Binaural pitches are auditory percepts that emerge from combined inputs to the ears but that cannot be heard if the stimulus is presented to either ear alone. Here, we describe a binaural pitch that is not easily accommodated within current models of binaural processing. Convergent magnetoencephalography (MEG) and psychophysical measurements were used to characterize the pitch, heard when band-limited noise had a rapidly changing interaural phase difference. Several interesting features emerged: First, the pitch was perceptually lateralized, in agreement with the lateralization of the evoked changes in MEG spectral power, and its salience depended on dichotic binaural presentation. Second, the frequency of the pure tone that matched the binaural pitch lay within a lower spectral sideband of the phase-modulated noise and followed the frequency of that sideband when the modulation frequency or center frequency and bandwidth of the noise changed. Thus, the binaural pitch depended on the processing of binaural information in that lower sideband.

AB - Binaural pitches are auditory percepts that emerge from combined inputs to the ears but that cannot be heard if the stimulus is presented to either ear alone. Here, we describe a binaural pitch that is not easily accommodated within current models of binaural processing. Convergent magnetoencephalography (MEG) and psychophysical measurements were used to characterize the pitch, heard when band-limited noise had a rapidly changing interaural phase difference. Several interesting features emerged: First, the pitch was perceptually lateralized, in agreement with the lateralization of the evoked changes in MEG spectral power, and its salience depended on dichotic binaural presentation. Second, the frequency of the pure tone that matched the binaural pitch lay within a lower spectral sideband of the phase-modulated noise and followed the frequency of that sideband when the modulation frequency or center frequency and bandwidth of the noise changed. Thus, the binaural pitch depended on the processing of binaural information in that lower sideband.

KW - beamforming

KW - binaural pitch

KW - Heschl’s gyrus

KW - lateralization

KW - MEG

KW - planum temporale

UR - http://www.scopus.com/inward/record.url?scp=84861547442&partnerID=8YFLogxK

UR - http://cercor.oxfordjournals.org/content/22/6/1271

U2 - 10.1093/cercor/bhr192

DO - 10.1093/cercor/bhr192

M3 - Article

VL - 22

SP - 1271

EP - 1281

JO - Cerebral Cortex

JF - Cerebral Cortex

SN - 1047-3211

IS - 6

ER -