다채널 보청기의 압축역치에 따른 자음인지와 음질의 변화

• 영문명: Changes of Consonant Recognition and Sound Quality as a Function of Compression Threshold on Multi-Channel Hearing Aids
• 발행기관: 한국청각언어재활학회
• 저자명: 김시온(Seeon Kim) 이경원(Kyoungwon Lee)
• 간행물 정보: 『Audiology and Speech Research』Audiology and Speech Research 제15권 제1호, 23~29쪽, 전체 7쪽
• 주제분류: 사회과학 > 교육학
• 파일형태: PDF
• 발행일자: 2019.01.31

영문 초록

Purpose: The purpose of the present study was to investigate whether function of compression threshold (CT) affects the scores of Korean consonant perception test (KCPT) and sound quality in quiet and noisy environments. Methods: The subjects were 18 adults with sensorineural hearing loss, average age of 56.8 years, word recognition more than 40% and pure tone average of 54.3 dB HL. The hearing aids used in this study were behind-the-ear type hearing aid with more than 4 channels. After randomly adjusting the CT to 55, 65, 75 dB SPL in quiet and white noise environments (+6 dB signal-to-noise ratio), the scores of KCPT and preferences (clarity, sound quality, and loudness of noise) were evaluated. Results: The CT of 55 dB SPL and 65 dB SPL scored higher KCPT than CT of 65 dB SPL in noisy environment. In quiet environment, however, there was no difference in Korean consonant recognition score based on its CT. In the preferences assessment, CT of 55 dB SPL showed greater loudness of noise than CT of 75 dB SPL. However, the clarity and sound quality did not vary on CT in quiet and noisy environments. Conclusion: Based on the results of this study, it has been confirmed that CT may affect the recognition of Korean speech sounds and the loudness of noise. Therefore, the control of CT should be considered when adjusting electroacoustic elements of the multi-channel hearing aid.

목차

INTRODUCTION

MATERIALS AND METHODS

DISCUSSIONS

키워드

압축역치 압축비율 다채널 보청기 자음인지 Compression threshold Compression ratio Multi-channel Hearing aids Consonant recognition