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Establishing the Response of Low Frequency Auditory FiltersThe response of auditory filters is central to frequency selectivity of sound by the human auditory system. This is true especially for realistic complex sounds that are often encountered in many applications such as modeling the audibility of sound, voice recognition, noise cancelation, and the development of advanced hearing aid devices. The purpose of this study was to establish the response of low frequency (below 100Hz) auditory filters. Two experiments were designed and executed; the first was to measure subject's hearing threshold for pure tones (at 25, 31.5, 40, 50, 63 and 80 Hz), and the second was to measure the Psychophysical Tuning Curves (PTCs) at two signal frequencies (Fs= 40 and 63Hz). Experiment 1 involved 36 subjects while experiment 2 used 20 subjects selected from experiment 1. Both experiments were based on a 3-down 1-up 3AFC adaptive staircase test procedure using either a variable level narrow-band noise masker or a tone. A summary of the results includes masked threshold data in form of PTCs, the response of auditory filters, their distribution, and comparison with similar recently published data.
Document ID
20180000517
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Rafaelof, Menachem (National Inst. of Aerospace Hampton, VA, United States)
Christian, Andrew (NASA Langley Research Center Hampton, VA, United States)
Shepherd, Kevin (NASA Langley Research Center Hampton, VA, United States)
Rizzi, Stephen (NASA Langley Research Center Hampton, VA, United States)
Stephenson, James (Army Aviation and Missile Research Development Engineering Center Hampton, VA, United States)
Date Acquired
January 17, 2018
Publication Date
December 4, 2017
Subject Category
Acoustics
Report/Patent Number
NF1676L-27590
Meeting Information
Meeting: Meeting of the Acoustical Society of America
Location: New Orleans, LA
Country: United States
Start Date: December 4, 2017
End Date: December 8, 2017
Sponsors: Acoustical Society of America
Funding Number(s)
WBS: WBS 664817.02.07.03.02.03
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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