An in situ calibration for hearing thresholds

Robert H. Withnell, Patricia S. Jeng, Kelly Waldvogel, Kari Morgenstein, Jont B. Allen

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Quantifying how the sound delivered to the ear canal relates to hearing threshold has historically relied on acoustic calibration in physical assemblies with an input impedance intended to match the human ear (e.g., a Zwislocki coupler). The variation in the input impedance of the human ear makes such a method of calibration questionable. It is preferable to calibrate the acoustic signal in each ear individually. By using a calibrated sound source and microphone, the acoustic input impedance of the ear can be determined, and the sound delivered to the ear calibrated in terms of either (i) the incident sound pressure wave or (ii) that portion of the incident sound pressure wave transmitted to the middle ear and cochlea. Hearing thresholds expressed in terms of these quantities are reported, these in situ calibrations not being confounded by ear canal standing waves. Either would serve as a suitable replacement for the current practice of hearing thresholds expressed in terms of sound pressure level calibrated in a 6cc or 2cc coupler.

Original languageEnglish (US)
Pages (from-to)1605-1611
Number of pages7
JournalJournal of the Acoustical Society of America
Volume125
Issue number3
DOIs
StatePublished - 2009
Externally publishedYes

Fingerprint

ear
hearing
thresholds
acoustics
sound pressure
canals
impedance
elastic waves
couplers
middle ear
cochlea
In Situ
Ear
Calibration
Hearing
microphones
standing waves
assemblies
Sound
Waves

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

An in situ calibration for hearing thresholds. / Withnell, Robert H.; Jeng, Patricia S.; Waldvogel, Kelly; Morgenstein, Kari; Allen, Jont B.

In: Journal of the Acoustical Society of America, Vol. 125, No. 3, 2009, p. 1605-1611.

Research output: Contribution to journalArticle

Withnell, RH, Jeng, PS, Waldvogel, K, Morgenstein, K & Allen, JB 2009, 'An in situ calibration for hearing thresholds', Journal of the Acoustical Society of America, vol. 125, no. 3, pp. 1605-1611. https://doi.org/10.1121/1.3075551
Withnell, Robert H. ; Jeng, Patricia S. ; Waldvogel, Kelly ; Morgenstein, Kari ; Allen, Jont B. / An in situ calibration for hearing thresholds. In: Journal of the Acoustical Society of America. 2009 ; Vol. 125, No. 3. pp. 1605-1611.
@article{6c51fe3fa4854a3d8f2ab9537076db21,
title = "An in situ calibration for hearing thresholds",
abstract = "Quantifying how the sound delivered to the ear canal relates to hearing threshold has historically relied on acoustic calibration in physical assemblies with an input impedance intended to match the human ear (e.g., a Zwislocki coupler). The variation in the input impedance of the human ear makes such a method of calibration questionable. It is preferable to calibrate the acoustic signal in each ear individually. By using a calibrated sound source and microphone, the acoustic input impedance of the ear can be determined, and the sound delivered to the ear calibrated in terms of either (i) the incident sound pressure wave or (ii) that portion of the incident sound pressure wave transmitted to the middle ear and cochlea. Hearing thresholds expressed in terms of these quantities are reported, these in situ calibrations not being confounded by ear canal standing waves. Either would serve as a suitable replacement for the current practice of hearing thresholds expressed in terms of sound pressure level calibrated in a 6cc or 2cc coupler.",
author = "Withnell, {Robert H.} and Jeng, {Patricia S.} and Kelly Waldvogel and Kari Morgenstein and Allen, {Jont B.}",
year = "2009",
doi = "10.1121/1.3075551",
language = "English (US)",
volume = "125",
pages = "1605--1611",
journal = "Journal of the Acoustical Society of America",
issn = "0001-4966",
publisher = "Acoustical Society of America",
number = "3",

}

TY - JOUR

T1 - An in situ calibration for hearing thresholds

AU - Withnell, Robert H.

AU - Jeng, Patricia S.

AU - Waldvogel, Kelly

AU - Morgenstein, Kari

AU - Allen, Jont B.

PY - 2009

Y1 - 2009

N2 - Quantifying how the sound delivered to the ear canal relates to hearing threshold has historically relied on acoustic calibration in physical assemblies with an input impedance intended to match the human ear (e.g., a Zwislocki coupler). The variation in the input impedance of the human ear makes such a method of calibration questionable. It is preferable to calibrate the acoustic signal in each ear individually. By using a calibrated sound source and microphone, the acoustic input impedance of the ear can be determined, and the sound delivered to the ear calibrated in terms of either (i) the incident sound pressure wave or (ii) that portion of the incident sound pressure wave transmitted to the middle ear and cochlea. Hearing thresholds expressed in terms of these quantities are reported, these in situ calibrations not being confounded by ear canal standing waves. Either would serve as a suitable replacement for the current practice of hearing thresholds expressed in terms of sound pressure level calibrated in a 6cc or 2cc coupler.

AB - Quantifying how the sound delivered to the ear canal relates to hearing threshold has historically relied on acoustic calibration in physical assemblies with an input impedance intended to match the human ear (e.g., a Zwislocki coupler). The variation in the input impedance of the human ear makes such a method of calibration questionable. It is preferable to calibrate the acoustic signal in each ear individually. By using a calibrated sound source and microphone, the acoustic input impedance of the ear can be determined, and the sound delivered to the ear calibrated in terms of either (i) the incident sound pressure wave or (ii) that portion of the incident sound pressure wave transmitted to the middle ear and cochlea. Hearing thresholds expressed in terms of these quantities are reported, these in situ calibrations not being confounded by ear canal standing waves. Either would serve as a suitable replacement for the current practice of hearing thresholds expressed in terms of sound pressure level calibrated in a 6cc or 2cc coupler.

UR - http://www.scopus.com/inward/record.url?scp=62249163653&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=62249163653&partnerID=8YFLogxK

U2 - 10.1121/1.3075551

DO - 10.1121/1.3075551

M3 - Article

VL - 125

SP - 1605

EP - 1611

JO - Journal of the Acoustical Society of America

JF - Journal of the Acoustical Society of America

SN - 0001-4966

IS - 3

ER -