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Communication Dans Un Congrès Année : 2020

Measuring the Performance of the Hearing Aids Adaptive Directivity and Noise Reduction Algorithms through SNR Values

Résumé

Audibility in noise is hearing impaired people essential problem. Hearing aids manufacturers, in recent years, improved signal processing options such as adaptive microphone directivity and noise reduction. The most recent hearing aids use of the source localization to distinguish the useful signals (speech) from those caused by the nuisance (noise). Once localized, the noises are attenuated to let the speech out. The objective of this study is to investigate this speech intelligibility options effectiveness using the Signal-to-Noise Ratio (SNR), for different types of masking noise, different sound levels and different speech signal directions. The auditory simulation platform of the Faculty of Pharmacy audiology training center of the University of Lorraine has been used to reproduce the free-field vocal audiometry conditions and to analyze the output signals of the hearing aids placed on the ears of an artificial head. The output SNR of hearing aids is estimated using the Hagerman and Olofsson method (2004). The SNR frequency variation for the different tested noise types and speech signal directions allows us to discuss algorithmic strategies. Finally, listening to the analyzed signals makes it possible to compare the measured objective numerical values with our subjective intelligibility and listening comfort feeling.
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Dates et versions

hal-03242424 , version 1 (16-06-2021)

Identifiants

Citer

Balbine Maillou, Joël Ducourneau. Measuring the Performance of the Hearing Aids Adaptive Directivity and Noise Reduction Algorithms through SNR Values. Forum Acusticum, Dec 2020, Lyon, France. pp.2773-2780, ⟨10.48465/fa.2020.0387⟩. ⟨hal-03242424⟩
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