Modulation Discrimination Interference and Auditory Grouping
The detection of a change in the modulation pattern of a (target) carrier frequency, f$_{\text{c}}$ (for example a change in the depth of amplitude or frequency modulation, AM or FM) can be adversely affected by the presence of other modulated sounds (maskers) at frequencies remote from f$_{\text{c}...
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Published in | Philosophical transactions of the Royal Society of London. Series B. Biological sciences Vol. 336; no. 1278; pp. 339 - 346 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
London
The Royal Society
29.06.1992
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Subjects | |
Online Access | Get full text |
ISSN | 0962-8436 1471-2970 |
DOI | 10.1098/rstb.1992.0067 |
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Abstract | The detection of a change in the modulation pattern of a (target) carrier frequency, f$_{\text{c}}$ (for example
a change in the depth of amplitude or frequency modulation, AM or FM) can be adversely affected by the presence of other modulated
sounds (maskers) at frequencies remote from f$_{\text{c}}$, an effect called modulation discrimination interference
(MDI). MDI cannot be explained in terms of interaction of the sounds in the peripheral auditory system. It may result partly
from a tendency for sounds which are modulated in a similar way to be perceptually `grouped', i.e. heard as a single sound.
To test this idea, MDI for the detection of a change in AM depth was measured as a function of stimulus variables known to
affect perceptual grouping, namely overall duration and onset and offset asynchrony between the masking and target sounds.
In parallel experiments, subjects were presented with a series of pairs of sounds, the target alone and the target with maskers,
and were asked to rate how clearly the modulation of the target could be heard in the complex mixture. The results suggest
that two factors contribute to MDI. One factor is difficulty in hearing a pitch corresponding to the target frequency. This
factor appears to be strongly affected by perceptual grouping. Its effects can be reduced or abolished by asynchronous gating
of the target and masker. The second factor is a specific difficulty in hearing the modulation of the target, or in distinguishing
that modulation from the modulation of other sounds that are present. This factor has effects even under conditions promoting
perceptual segregation of the target and masker. |
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AbstractList | The detection of a change in the modulation pattern of a (target) carrier frequency, fc(for example a change in the depth of amplitude or frequency modulation, AM or FM) can be adversely affected by the presence of other modulated sounds (maskers) at frequencies remote from fc, an effect called modulation discrimination interference (MDI). MDI cannot be explained in terms of interaction of the sounds in the peripheral auditory system. It may result partly from a tendency for sounds which are modulated in a similar way to be perceptually `grouped', i.e. heard as a single sound. To test this idea, MDI for the detection of a change in AM depth was measured as a function of stimulus variables known to affect perceptual grouping, namely overall duration and onset and offset asynchrony between the masking and target sounds. In parallel experiments, subjects were presented with a series of pairs of sounds, the target alone and the target with maskers, and were asked to rate how clearly the modulation of the target could be heard in the complex mixture. The results suggest that two factors contribute to MDI. One factor is difficulty in hearing a pitch corresponding to the target frequency. This factor appears to be strongly affected by perceptual grouping. Its effects can be reduced or abolished by asynchronous gating of the target and masker. The second factor is a specific difficulty in hearing the modulation of the target, or in distinguishing that modulation from the modulation of other sounds that are present. This factor has effects even under conditions promoting perceptual segregation of the target and masker. The detection of a change in the modulation pattern of a (target) carrier frequency, Fc(for example a change in the depth of amplitude or frequency modulation, am or fm) can be adversely affected by the presence of other modulated sounds (maskers) at frequencies remote from fc, an effect called modulation discrimination interference (MDI). MDI cannot be explained in terms of interaction of the sounds in the peripheral auditory system. It may result partly from a tendency for sounds which are modulated in a similar way to be perceptually ‘grouped’, i.e. heard as a single sound. To test this idea, MDI for the detection of a change in am depth was measured as a function of stimulus variables known to affect perceptual grouping, namely overall duration and onset and offset asynchrony between the masking and target sounds. In parallel experiments, subjects were presented with a series of pairs of sounds, the target alone and the target with maskers, and were asked to rate how clearly the modulation of the target could be heard in the complex mixture. The results suggest that two factors contribute to MDI. One factor is difficulty in hearing a pitch corresponding to the target frequency. This factor appears to be strongly affected by perceptual grouping. Its effects can be reduced or abolished by asynchronous gating of the target and masker. The second factor is a specific difficulty in hearing the m odulation of the target, or in distinguishing that modulation from the modulation of other sounds that are present. This factor has effects even under conditions prom oting perceptual segregation of the target and masker. The detection of a change in the modulation pattern of a (target) carrier frequency, f$_{\text{c}}$ (for example a change in the depth of amplitude or frequency modulation, AM or FM) can be adversely affected by the presence of other modulated sounds (maskers) at frequencies remote from f$_{\text{c}}$, an effect called modulation discrimination interference (MDI). MDI cannot be explained in terms of interaction of the sounds in the peripheral auditory system. It may result partly from a tendency for sounds which are modulated in a similar way to be perceptually `grouped', i.e. heard as a single sound. To test this idea, MDI for the detection of a change in AM depth was measured as a function of stimulus variables known to affect perceptual grouping, namely overall duration and onset and offset asynchrony between the masking and target sounds. In parallel experiments, subjects were presented with a series of pairs of sounds, the target alone and the target with maskers, and were asked to rate how clearly the modulation of the target could be heard in the complex mixture. The results suggest that two factors contribute to MDI. One factor is difficulty in hearing a pitch corresponding to the target frequency. This factor appears to be strongly affected by perceptual grouping. Its effects can be reduced or abolished by asynchronous gating of the target and masker. The second factor is a specific difficulty in hearing the modulation of the target, or in distinguishing that modulation from the modulation of other sounds that are present. This factor has effects even under conditions promoting perceptual segregation of the target and masker. The detection of a change in the modulation pattern of a (target) carrier frequency, F c (for example a change in the depth of amplitude or frequency modulation, am or fm) can be adversely affected by the presence of other modulated sounds (maskers) at frequencies remote from f c , an effect called modulation discrimination interference (MDI). MDI cannot be explained in terms of interaction of the sounds in the peripheral auditory system. It may result partly from a tendency for sounds which are modulated in a similar way to be perceptually ‘grouped’, i.e. heard as a single sound. To test this idea, MDI for the detection of a change in am depth was measured as a function of stimulus variables known to affect perceptual grouping, namely overall duration and onset and offset asynchrony between the masking and target sounds. In parallel experiments, subjects were presented with a series of pairs of sounds, the target alone and the target with maskers, and were asked to rate how clearly the modulation of the target could be heard in the complex mixture. The results suggest that two factors contribute to MDI. One factor is difficulty in hearing a pitch corresponding to the target frequency. This factor appears to be strongly affected by perceptual grouping. Its effects can be reduced or abolished by asynchronous gating of the target and masker. The second factor is a specific difficulty in hearing the m odulation of the target, or in distinguishing that modulation from the modulation of other sounds that are present. This factor has effects even under conditions prom oting perceptual segregation of the target and masker. The detection of a change in the modulation pattern of a (target) carrier frequency, fc (for example a change in the depth of amplitude or frequency modulation, AM or FM) can be adversely affected by the presence of other modulated sounds (maskers) at frequencies remote from fc, an effect called modulation discrimination interference (MDI). MDI cannot be explained in terms of interaction of the sounds in the peripheral auditory system. It may result partly from a tendency for sounds which are modulated in a similar way to be perceptually 'grouped', i.e. heard as a single sound. To test this idea, MDI for the detection of a change in AM depth was measured as a function of stimulus variables known to affect perceptual grouping, namely overall duration and onset and offset asynchrony between the masking and target sounds. In parallel experiments, subjects were presented with a series of pairs of sounds, the target alone and the target with maskers, and were asked to rate how clearly the modulation of the target could be heard in the complex mixture. The results suggest that two factors contribute to MDI. One factor is difficulty in hearing a pitch corresponding to the target frequency. This factor appears to be strongly affected by perceptual grouping. Its effects can be reduced or abolished by asynchronous gating of the target and masker. The second factor is a specific difficulty in hearing the modulation of the target, or in distinguishing that modulation from the modulation of other sounds that are present. This factor has effects even under conditions promoting perceptual segregation of the target and masker.The detection of a change in the modulation pattern of a (target) carrier frequency, fc (for example a change in the depth of amplitude or frequency modulation, AM or FM) can be adversely affected by the presence of other modulated sounds (maskers) at frequencies remote from fc, an effect called modulation discrimination interference (MDI). MDI cannot be explained in terms of interaction of the sounds in the peripheral auditory system. It may result partly from a tendency for sounds which are modulated in a similar way to be perceptually 'grouped', i.e. heard as a single sound. To test this idea, MDI for the detection of a change in AM depth was measured as a function of stimulus variables known to affect perceptual grouping, namely overall duration and onset and offset asynchrony between the masking and target sounds. In parallel experiments, subjects were presented with a series of pairs of sounds, the target alone and the target with maskers, and were asked to rate how clearly the modulation of the target could be heard in the complex mixture. The results suggest that two factors contribute to MDI. One factor is difficulty in hearing a pitch corresponding to the target frequency. This factor appears to be strongly affected by perceptual grouping. Its effects can be reduced or abolished by asynchronous gating of the target and masker. The second factor is a specific difficulty in hearing the modulation of the target, or in distinguishing that modulation from the modulation of other sounds that are present. This factor has effects even under conditions promoting perceptual segregation of the target and masker. |
Author | Michael J. Shailer Brian C. J. Moore |
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BackLink | https://www.ncbi.nlm.nih.gov/pubmed/1354373$$D View this record in MEDLINE/PubMed |
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Cites_doi | 10.1121/1.401777 10.1103/RevModPhys.12.47 10.1113/jphysiol.1972.sp009962 |
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Contributor | Darwin, C. J. Carlyon, Robert P. Russell, Ian John |
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Copyright | Copyright 1992 The Royal Society Scanned images copyright © 2017, Royal Society |
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References | (p_11) 1982; 62 p_2 p_18 p_12 Liao C. (p_3) 1990; 47 p_13 p_14 p_8 p_7 Child T. (p_15) 1991; 43 p_9 Schooneveldt G . (p_17) 1990; 87 Pinker S. (p_4) 1978; 32 (p_5) 1981; 33 (p_10) 1989; 85 Bacon S.P. (p_1) 1989; 85 Peters R.W . (p_16) 1986; 80 (p_6) 1984; 36 |
References_xml | – ident: p_14 – volume: 33 start-page: 185 year: 1981 ident: p_5 article-title: P erceptual grouping o f speech com ponents differing in fu n d am en tal frequency and onset time. Q.J l exp publication-title: Psychol. – ident: p_8 doi: 10.1121/1.401777 – volume: 85 start-page: 1676 year: 1989 ident: p_10 article-title: F requency selectivity in am plitudem odulation detection. J . acoust publication-title: Soc. Am. – ident: p_13 – volume: 43 start-page: 327 year: 1991 ident: p_15 article-title: A cross-channel m asking of changes in m odulation d epth for am plitude- and frequency-m odulated signals. Q. J l exp publication-title: Psychol. – volume: 85 start-page: 2575 year: 1989 ident: p_1 article-title: M o d u latio n m asking: effects o f m o dulation frequency, d ep th and phase. J . acoust publication-title: Soc. Am. – ident: p_2 – ident: p_18 – ident: p_7 doi: 10.1103/RevModPhys.12.47 – ident: p_12 doi: 10.1113/jphysiol.1972.sp009962 – volume: 47 start-page: 68 year: 1990 ident: p_3 article-title: Fusion of au d ito ry com ponents: effects o f the frequency o f am p litude m odulation publication-title: Percept. Psychophys. – volume: 36 start-page: 193 year: 1984 ident: p_6 article-title: G rouping frequency com ponents o f vowels: w hen is a harm onic not a h arm o - nic? Q.J l exp publication-title: Psychol. – volume: 80 start-page: 479 year: 1986 ident: p_16 article-title: T hresholds for hearing m istuned partials as separate tones in harm onic complexes. J . acoust publication-title: Soc. Am. – ident: p_9 – volume: 32 start-page: 19 year: 1978 ident: p_4 article-title: A uditory stream ing and the building o f tim bre. Can. J publication-title: Psychol. – volume: 62 start-page: 894 year: 1982 ident: p_11 article-title: H earing o f m odulation in sounds publication-title: Physiol. Rev. – volume: 87 start-page: 1683 year: 1990 ident: p_17 article-title: A cross-channel m asking and com odulation release. J. acoust publication-title: Soc. Am. |
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Snippet | The detection of a change in the modulation pattern of a (target) carrier frequency, f$_{\text{c}}$ (for example
a change in the depth of amplitude or... The detection of a change in the modulation pattern of a (target) carrier frequency, fc(for example a change in the depth of amplitude or frequency modulation,... The detection of a change in the modulation pattern of a (target) carrier frequency, Fc(for example a change in the depth of amplitude or frequency modulation,... The detection of a change in the modulation pattern of a (target) carrier frequency, F c (for example a change in the depth of amplitude or frequency... The detection of a change in the modulation pattern of a (target) carrier frequency, fc (for example a change in the depth of amplitude or frequency... |
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SubjectTerms | Acoustic Stimulation Amplitude modulation Audio frequencies Auditory Perception - physiology Auditory Threshold - physiology Carrier frequencies Experimentation Hearing aids Humans Modulated signal processing Musical modulation Perceptual Masking - physiology Pitch Discrimination - physiology Psychoacoustics Sound Sound pitch Theatrical masks |
Title | Modulation Discrimination Interference and Auditory Grouping |
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