Initial Development of a Temporal-Envelope-Preserving Nonlinear Hearing Aid Prescription Using a Genetic Algorithm
Most hearing aid prescriptions focus on the optimization of a metric derived from the long-term average spectrum of speech, and do not consider how the prescribed values might distort the temporal envelope shape. A growing body of evidence suggests that such distortions can lead to systematic errors...
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| Veröffentlicht in: | Trends in amplification 2013-06, Vol.17 (2), p.94-107 |
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| description | Most hearing aid prescriptions focus on the optimization of a metric derived from the long-term average spectrum of speech, and do not consider how the prescribed values might distort the temporal envelope shape. A growing body of evidence suggests that such distortions can lead to systematic errors in speech perception, and therefore hearing aid prescriptions might benefit by including preservation of the temporal envelope shape in their rationale. To begin to explore this possibility, we designed a genetic algorithm (GA) to find the multiband compression settings that preserve the shape of the original temporal envelope while placing that envelope in the listener’s audiometric dynamic range. The resulting prescription had a low compression threshold, short attack and release times, and a combination of compression ratio and gain that placed the output signal within the listener’s audiometric dynamic range. Initial behavioral tests of individuals with impaired hearing revealed no difference in speech-in-noise perception between the GA and the NAL-NL2 prescription. However, gap detection performance was superior with the GA in comparison to NAL-NL2. Overall, this work is a proof of concept that consideration of temporal envelope distortions can be incorporated into hearing aid prescriptions. |
| doi_str_mv | 10.1177/1084713813495981 |
| format | Article |
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A growing body of evidence suggests that such distortions can lead to systematic errors in speech perception, and therefore hearing aid prescriptions might benefit by including preservation of the temporal envelope shape in their rationale. To begin to explore this possibility, we designed a genetic algorithm (GA) to find the multiband compression settings that preserve the shape of the original temporal envelope while placing that envelope in the listener’s audiometric dynamic range. The resulting prescription had a low compression threshold, short attack and release times, and a combination of compression ratio and gain that placed the output signal within the listener’s audiometric dynamic range. Initial behavioral tests of individuals with impaired hearing revealed no difference in speech-in-noise perception between the GA and the NAL-NL2 prescription. However, gap detection performance was superior with the GA in comparison to NAL-NL2. Overall, this work is a proof of concept that consideration of temporal envelope distortions can be incorporated into hearing aid prescriptions.</description><subject>Acoustic Stimulation</subject><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Algorithms</subject><subject>Audiometry, Speech</subject><subject>Auditory Threshold</subject><subject>Compressing</subject><subject>Correction of Hearing Impairment - instrumentation</subject><subject>Distortion</subject><subject>Envelopes</subject><subject>Equipment Design</subject><subject>Female</subject><subject>Genetic algorithms</subject><subject>Hearing</subject><subject>Hearing Aids</subject><subject>Hearing Loss, Sensorineural - diagnosis</subject><subject>Hearing Loss, Sensorineural - physiopathology</subject><subject>Hearing Loss, Sensorineural - psychology</subject><subject>Hearing Loss, Sensorineural - rehabilitation</subject><subject>Humans</subject><subject>Male</subject><subject>Middle Aged</subject><subject>Noise - adverse effects</subject><subject>Nonlinear Dynamics</subject><subject>Perception</subject><subject>Perceptual Masking</subject><subject>Persons With Hearing Impairments - psychology</subject><subject>Persons With Hearing Impairments - rehabilitation</subject><subject>Signal Processing, Computer-Assisted</subject><subject>Sound Spectrography</subject><subject>Speech</subject><subject>Speech Perception</subject><subject>Temporal logic</subject><subject>Time Factors</subject><issn>1084-7138</issn><issn>1940-5588</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kc9v2yAUx9HUaf21-04Vx17cAcYGLpOitksiRV0PzRkR_JxS2eCBE2n__fCSVeukXgC97-d94fFF6AslN5QK8ZUSyQUtJS25qpSkH9AZVZwUVSXlST5nuZj0U3Se0gshRIq6_oROGSdMSkXOUFx6NzrT4TvYQxeGHvyIQ4sNfoJ-CNF0xb3_o0DxGCFB3Du_xQ_Bd86DiXiRl6kycw2eABvdMLrg8TpNZYPn4GF0Fs-6bYhufO4v0cfWdAk-H_cLtP5-_3S7KFY_5svb2aqwvBZjQVvZ1kzYilTS2oZvuNkoq8SmEUK1ta14BZYQUI2qSyWs4UZY1gjJWm4ZI-UF-nbwHXabHhqbJ8vj6CG63sRfOhin3yrePett2OtSMaEUzQbXR4MYfu4gjbp3yULXGQ9hlzTlXArKS8oySg6ojSGlCO3rNZToKSr9f1S55erf5702_M0mA8UBSGYL-iXsos_f9b7hb82mni4</recordid><startdate>20130601</startdate><enddate>20130601</enddate><creator>Sabin, Andrew T.</creator><creator>Souza, Pamela E.</creator><general>SAGE Publications</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SC</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>JQ2</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>5PM</scope></search><sort><creationdate>20130601</creationdate><title>Initial Development of a Temporal-Envelope-Preserving Nonlinear Hearing Aid Prescription Using a Genetic Algorithm</title><author>Sabin, Andrew T. ; 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| ispartof | Trends in amplification, 2013-06, Vol.17 (2), p.94-107 |
| issn | 1084-7138 1940-5588 |
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| source | Sage Journals GOLD Open Access 2024 |
| subjects | Acoustic Stimulation Aged Aged, 80 and over Algorithms Audiometry, Speech Auditory Threshold Compressing Correction of Hearing Impairment - instrumentation Distortion Envelopes Equipment Design Female Genetic algorithms Hearing Hearing Aids Hearing Loss, Sensorineural - diagnosis Hearing Loss, Sensorineural - physiopathology Hearing Loss, Sensorineural - psychology Hearing Loss, Sensorineural - rehabilitation Humans Male Middle Aged Noise - adverse effects Nonlinear Dynamics Perception Perceptual Masking Persons With Hearing Impairments - psychology Persons With Hearing Impairments - rehabilitation Signal Processing, Computer-Assisted Sound Spectrography Speech Speech Perception Temporal logic Time Factors |
| title | Initial Development of a Temporal-Envelope-Preserving Nonlinear Hearing Aid Prescription Using a Genetic Algorithm |
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