| Forward-pressure level for in-the-ear calibration. | |
| | |
MedLine Citation:
|
PMID: 20330576 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
When acoustic impedance of the ear canal is known, sound pressure measured by a microphone in the ear canal can be decomposed into forward and reflected components. This decomposition provides a means to overcome problems associated with standing waves that may cause in-the-ear sound level calibration to be unreliable at high frequencies. Compared to total pressure measured at the sound source, we have demonstrated that forward pressure provides a more reliable estimate of sound quantity entering the ear, especially at frequencies above 4 kHz. Specifically, we have demonstrated increased reliability in measurements of distortion-product otoacoustic emissions (DPOAEs) when we use forward-pressure level (FPL) calibrations. Also, we have shown that behavioral threshold measurements for stimuli calibrated in FPL are more reliable than conventional calibration methods in the 4-10 kHz range. FPL calibration may provide advantages at high frequencies (1) for assessing hearing status with DPOAEs and (2) for fitting hearing aids using real-ear measurements. Objective methods of assessing hearing loss and fitting hearing aids at high frequencies are needed because the 6-12 kHz range is known to be important to young children for learning speech. [Work supported by Grants DC2251, DC8312, and DC4662 from the NIHNIDCD.]. |
| | |
Authors:
|
Stephen T Neely; Michael P Gorga |
Related Documents
:
|
17388446 - Pressure-induced reduction of shielding for improving sonochemical activity. 17155106 - Dynamical systems techniques reveal the sexual dimorphic nature of motor patterns in bi... 19355466 - Analysis and prediction of underwater sound radiation from a cylindrical pile driven by... 1629486 - Vocal intensity in speakers and singers. 2555106 - Endogenous digoxin-like immunoreactive factor and digitalis-like factor associated with... 17530456 - Cold face test: adrenergic phase. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: The Journal of the Acoustical Society of America Volume: 127 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Mar |
Date Detail:
|
Created Date: 2010-03-24 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
|
Languages: eng Pagination: 1868 Citation Subset: IM |
Affiliation:
|
Boys Town Natl. Res. Hospital, 555 N. 30th St., Omaha, NE 68131, neely@boystown.org. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: In-situ calibrated sound signals and hearing sensitivity.
Next Document: An eardrum impedance simulator for use with physical replicas of the human ear canal.