Changes of Non-Sense Syllabic Word Scores and Preferences as a Function of Release Time on Multi-Channel Hearing Aids

Abstract

Purpose To determine the effective release time (RT) for listening to Korean sounds when wearing hearing aids, we evaluated Korean non-sense syllabic word recognition scores (NSRS) and the clarity of conversation sounds, the size of noise, and the overall preferences as a function of RT. Methods Twenty adults and elderly people with mild to severe sensorineural hearing loss were participated as subjects. In the quiet and noise environment, NSRS and preferences were evaluated after setting the RT of the multi-channel hearing aids to 70, 200, and 600 ms. Presentation level of non-sense syllabic word was 45 dB HL and signal-to-noise ratio was 6 dB in noise environment. Results NSRS was not different as a function of RT in quiet, but NSRS of 200 ms was higher than 70 ms and 600 ms in noise environment. However, clarity, loudness of noise, and overall preference did not show a difference in RT in a quiet and noisy environment. Conclusion Through this study, it was confirmed that Korean NSRS can be affected by RT. Therefore, in order to develop a hearing aid fitting formula that is effective in recognition of Korean speech sound, it is necessary to consider the RT. Key Words: Hearing aids, Release time, Compression threshold, Compression ratio, Hearing aid fitting formula 중심 단어: 보청기, í•´ì œì‹œê°„, 압축역치, 압축비율, ë³´ì²­ê¸°ì í•©ê³µì‹