Estimating auditory filter bandwidth using distortion product otoacoustic emissions

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceabstrakt i proceedingForskningpeer review

Abstract

The basic frequency selectivity in the listener’s hearing is often characterized by auditory filters. These filters are determined through listening tests, which determine the masking threshold as a function of frequency of the tone and the bandwidth of the masking sound. The auditory filters have been shown (Glasberg and Moore, 1986) to be wider for listeners with sensorineural impairment. In a recent study (Christensen et al., 2017) it was demonstrated on group basis that the distortion product stimulus ratio that provided the strongest 2f1-f2 component at low frequencies, had a strong correlation to the theoretical relation between frequency and auditory filter bandwidth, described by the equivalent rectangular bandwidth (ERB, Glasberg and Moore, 1990). The purpose of the present study is to test if a similar correlation exists on an individual basis at normal audiometric frequencies. The optimal 2f1-f2 (L1/L2=65/45 dB SPL). The distortion-product-otoacoustic-emission ratio is determined using a custom-made measurement system programmed in MATLAB. The auditory filters are determined using notched-noise method in a two alternative forced choice experiment with noise levels at 40 dB SPL/Hz. Optimal ratios and auditory filters are determined at 1, 2, and 4 kHz for 10 young normal-hearing subjects.
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Detaljer

The basic frequency selectivity in the listener’s hearing is often characterized by auditory filters. These filters are determined through listening tests, which determine the masking threshold as a function of frequency of the tone and the bandwidth of the masking sound. The auditory filters have been shown (Glasberg and Moore, 1986) to be wider for listeners with sensorineural impairment. In a recent study (Christensen et al., 2017) it was demonstrated on group basis that the distortion product stimulus ratio that provided the strongest 2f1-f2 component at low frequencies, had a strong correlation to the theoretical relation between frequency and auditory filter bandwidth, described by the equivalent rectangular bandwidth (ERB, Glasberg and Moore, 1990). The purpose of the present study is to test if a similar correlation exists on an individual basis at normal audiometric frequencies. The optimal 2f1-f2 (L1/L2=65/45 dB SPL). The distortion-product-otoacoustic-emission ratio is determined using a custom-made measurement system programmed in MATLAB. The auditory filters are determined using notched-noise method in a two alternative forced choice experiment with noise levels at 40 dB SPL/Hz. Optimal ratios and auditory filters are determined at 1, 2, and 4 kHz for 10 young normal-hearing subjects.
OriginalsprogEngelsk
TitelISAAR 2017 Adaptive Processes in Hearing
Antal sider1
Publikationsdato23 aug. 2017
Sider101
ArtikelnummerP.53
StatusUdgivet - 23 aug. 2017
PublikationsartForskning
Peer reviewJa
BegivenhedInternational Symposium on Auditory and Audiological Research: Adaptive Processes in Hearing - Hotel Nyborg Strand, Nyborg, Danmark
Varighed: 23 aug. 201725 aug. 2017
Konferencens nummer: 6
http://isaar.eu/

Konference

KonferenceInternational Symposium on Auditory and Audiological Research
Nummer6
LokationHotel Nyborg Strand
LandDanmark
ByNyborg
Periode23/08/201725/08/2017
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Kort

ID: 262164179