Phase effects in masking by harmonic complexes in birds

Amanda M. Lauer, Robert J. Dooling, Marjorie R. Leek, Jennifer J. Lentz

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Masking by harmonic complexes depends on the frequency content of the masker and its phase spectrum. Harmonic complexes created with negative Schroeder phases (component phases decreasing with increasing frequency) produce more masking than those with positive Schroeder phases (increasing phase) in humans, but not in birds. The masking differences in humans have been attributed to interactions between the masker phase spectrum and the phase characteristic of the basilar membrane. In birds, the similarity in masking by positive and negative Schroeder maskers, and reduced masking by cosine-phase maskers (constant phase), suggests a phase characteristic that does not change much along the basilar papilla. To evaluate this possibility, the rate of phase change across masker bandwidth was varied by systematically altering the Schroeder algorithm. Humans and three species of birds detected tones added in phase to a single component of a harmonic complex. As observed in earlier studies, the minimum amount of masking in humans occurred for positive phase gradients. However, minimum masking in birds occurred for a shallow negative phase gradient. These results suggest a cochlear delay in birds that is reduced compared to that found in humans, probably related to the shorter avian basilar epithelia.

Original languageEnglish (US)
Pages (from-to)1251-1259
Number of pages9
JournalJournal of the Acoustical Society of America
Volume119
Issue number2
DOIs
StatePublished - Feb 2006

Fingerprint

birds
masking
harmonics
papillae
gradients
epithelium
Harmonics
Birds
Masking
membranes
bandwidth

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Lauer, A. M., Dooling, R. J., Leek, M. R., & Lentz, J. J. (2006). Phase effects in masking by harmonic complexes in birds. Journal of the Acoustical Society of America, 119(2), 1251-1259. https://doi.org/10.1121/1.2151816

Phase effects in masking by harmonic complexes in birds. / Lauer, Amanda M.; Dooling, Robert J.; Leek, Marjorie R.; Lentz, Jennifer J.

In: Journal of the Acoustical Society of America, Vol. 119, No. 2, 02.2006, p. 1251-1259.

Research output: Contribution to journalArticle

Lauer, AM, Dooling, RJ, Leek, MR & Lentz, JJ 2006, 'Phase effects in masking by harmonic complexes in birds', Journal of the Acoustical Society of America, vol. 119, no. 2, pp. 1251-1259. https://doi.org/10.1121/1.2151816
Lauer, Amanda M. ; Dooling, Robert J. ; Leek, Marjorie R. ; Lentz, Jennifer J. / Phase effects in masking by harmonic complexes in birds. In: Journal of the Acoustical Society of America. 2006 ; Vol. 119, No. 2. pp. 1251-1259.
@article{cf84aa3298f044e3ba463195be92f438,
title = "Phase effects in masking by harmonic complexes in birds",
abstract = "Masking by harmonic complexes depends on the frequency content of the masker and its phase spectrum. Harmonic complexes created with negative Schroeder phases (component phases decreasing with increasing frequency) produce more masking than those with positive Schroeder phases (increasing phase) in humans, but not in birds. The masking differences in humans have been attributed to interactions between the masker phase spectrum and the phase characteristic of the basilar membrane. In birds, the similarity in masking by positive and negative Schroeder maskers, and reduced masking by cosine-phase maskers (constant phase), suggests a phase characteristic that does not change much along the basilar papilla. To evaluate this possibility, the rate of phase change across masker bandwidth was varied by systematically altering the Schroeder algorithm. Humans and three species of birds detected tones added in phase to a single component of a harmonic complex. As observed in earlier studies, the minimum amount of masking in humans occurred for positive phase gradients. However, minimum masking in birds occurred for a shallow negative phase gradient. These results suggest a cochlear delay in birds that is reduced compared to that found in humans, probably related to the shorter avian basilar epithelia.",
author = "Lauer, {Amanda M.} and Dooling, {Robert J.} and Leek, {Marjorie R.} and Lentz, {Jennifer J.}",
year = "2006",
month = "2",
doi = "10.1121/1.2151816",
language = "English (US)",
volume = "119",
pages = "1251--1259",
journal = "Journal of the Acoustical Society of America",
issn = "0001-4966",
publisher = "Acoustical Society of America",
number = "2",

}

TY - JOUR

T1 - Phase effects in masking by harmonic complexes in birds

AU - Lauer, Amanda M.

AU - Dooling, Robert J.

AU - Leek, Marjorie R.

AU - Lentz, Jennifer J.

PY - 2006/2

Y1 - 2006/2

N2 - Masking by harmonic complexes depends on the frequency content of the masker and its phase spectrum. Harmonic complexes created with negative Schroeder phases (component phases decreasing with increasing frequency) produce more masking than those with positive Schroeder phases (increasing phase) in humans, but not in birds. The masking differences in humans have been attributed to interactions between the masker phase spectrum and the phase characteristic of the basilar membrane. In birds, the similarity in masking by positive and negative Schroeder maskers, and reduced masking by cosine-phase maskers (constant phase), suggests a phase characteristic that does not change much along the basilar papilla. To evaluate this possibility, the rate of phase change across masker bandwidth was varied by systematically altering the Schroeder algorithm. Humans and three species of birds detected tones added in phase to a single component of a harmonic complex. As observed in earlier studies, the minimum amount of masking in humans occurred for positive phase gradients. However, minimum masking in birds occurred for a shallow negative phase gradient. These results suggest a cochlear delay in birds that is reduced compared to that found in humans, probably related to the shorter avian basilar epithelia.

AB - Masking by harmonic complexes depends on the frequency content of the masker and its phase spectrum. Harmonic complexes created with negative Schroeder phases (component phases decreasing with increasing frequency) produce more masking than those with positive Schroeder phases (increasing phase) in humans, but not in birds. The masking differences in humans have been attributed to interactions between the masker phase spectrum and the phase characteristic of the basilar membrane. In birds, the similarity in masking by positive and negative Schroeder maskers, and reduced masking by cosine-phase maskers (constant phase), suggests a phase characteristic that does not change much along the basilar papilla. To evaluate this possibility, the rate of phase change across masker bandwidth was varied by systematically altering the Schroeder algorithm. Humans and three species of birds detected tones added in phase to a single component of a harmonic complex. As observed in earlier studies, the minimum amount of masking in humans occurred for positive phase gradients. However, minimum masking in birds occurred for a shallow negative phase gradient. These results suggest a cochlear delay in birds that is reduced compared to that found in humans, probably related to the shorter avian basilar epithelia.

UR - http://www.scopus.com/inward/record.url?scp=31744443340&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=31744443340&partnerID=8YFLogxK

U2 - 10.1121/1.2151816

DO - 10.1121/1.2151816

M3 - Article

C2 - 16521786

AN - SCOPUS:31744443340

VL - 119

SP - 1251

EP - 1259

JO - Journal of the Acoustical Society of America

JF - Journal of the Acoustical Society of America

SN - 0001-4966

IS - 2

ER -