Calculation of transfer function of acoustic feedback path for in-the-ear hearing aids with a correction for specific acoustic impedance of a tubule

Katsuya Nakao; Ryouichi Nishimura; Yôiti Suzuki

doi:10.1250/ast.27.242

Calculation of transfer function of acoustic feedback path for in-the-ear hearing aids with a correction for specific acoustic impedance of a tubule

Katsuya Nakao, Ryouichi Nishimura, Yôiti Suzuki

Human Information Systems Division

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The formulation of the feedback transmission function of in-the-ear (ITE) with an equivalent circuit model based on the acoustic feedback was examined. The acoustic feedback transmission function of ITE hearing aids was modeled using a transmission matrix. The proposed calculation model can accurately simulate the acoustic characteristics of the feedback path between the ear cavity and the emission area. The validity of the proposed method for estimating the leakage of human ears will be examined by comparing the the calculation and measurement results using human ears. The results show that the proposed calculation method with the correction is useful for analyzing the aids since they usually have severe feedback problems from 1 Hz to 4 kHz.

Original language	English
Pages (from-to)	242-244
Number of pages	3
Journal	Acoustical Science and Technology
Volume	27
Issue number	4
DOIs	https://doi.org/10.1250/ast.27.242
Publication status	Published - 2006

Keywords

Acoustic feedback
Correction
Hearing aid
Impedance of a tubule
Transfer function

ASJC Scopus subject areas

Acoustics and Ultrasonics

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10.1250/ast.27.242

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abstract = "The formulation of the feedback transmission function of in-the-ear (ITE) with an equivalent circuit model based on the acoustic feedback was examined. The acoustic feedback transmission function of ITE hearing aids was modeled using a transmission matrix. The proposed calculation model can accurately simulate the acoustic characteristics of the feedback path between the ear cavity and the emission area. The validity of the proposed method for estimating the leakage of human ears will be examined by comparing the the calculation and measurement results using human ears. The results show that the proposed calculation method with the correction is useful for analyzing the aids since they usually have severe feedback problems from 1 Hz to 4 kHz.",

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AU - Suzuki, Yôiti

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AB - The formulation of the feedback transmission function of in-the-ear (ITE) with an equivalent circuit model based on the acoustic feedback was examined. The acoustic feedback transmission function of ITE hearing aids was modeled using a transmission matrix. The proposed calculation model can accurately simulate the acoustic characteristics of the feedback path between the ear cavity and the emission area. The validity of the proposed method for estimating the leakage of human ears will be examined by comparing the the calculation and measurement results using human ears. The results show that the proposed calculation method with the correction is useful for analyzing the aids since they usually have severe feedback problems from 1 Hz to 4 kHz.

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KW - Impedance of a tubule

KW - Transfer function

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