A Study of Low Frequency Acoustic Information for Cochlear Implant Users with Background Noise

低頻聽覺訊息對人工電子耳使用者在噪音環境之影響

黃柏誠(Bo-Cheng Huang) ； 李宜軒(Yi-Hsuan Lee) ； 蔡德明(Charles T. M. Choi)

《先進工程學刊》 8卷2期 (2013/04) Pp. 59-62

摘要

近年來許多研究發現人工電子耳搭配助聽器可以提升使用者的聽辨能力，特別是在噪音環境下的表現。這可能是因為助聽器所提供的低頻訊息可以幫助使用者從噪音中分離出語音訊息。本研究探討在噪音下低頻聽覺訊息對人工電子耳使用者語音辨識能力的影響。十位聽力正常的受試者分別在聆聽條件為只有單耳聽取模擬人工電子耳或雙耳分別聽取模擬人工電子耳與低通濾波語音下進行語音聽辨測試。結果顯示，當另一耳聽取低通濾波語音時能夠明顯的提升語音辨識率，在只有單耳聽取模擬人工電子耳且噪音來自另一側時，頭影效應明顯的提升聽辨能力。

關鍵字

人工電子耳 ； 低頻聽覺訊息 ； 雙模式聽覺 ； 聽覺實驗

並列摘要

Recent studies have reported speech intelligibility from cochlear implant (CI) users fitting a contralateral hearing aid can be improved, especially in a noisy environment. This is partly true due to the contribution of the residual low frequency acoustic information provided from hearing aid. In this study, we evaluate the difference of speech recognition in Taiwanese Mandarin between CI users with and without low pass speech sound provided in noise. Ten normal hearing test-takers were measured speech recognition rate by listening to either unilateral simulated CI or bimodal (CI + low pass speech) hearing. The result shows the addition of low pass speech sound led to significant improvements in speech recognition under one-ear hearing condition and the head shadow effect was significant improved by performance in unilateral CI condition when noise coming from contralateral of CI.

並列關鍵字

cochlear implant (CI) ； low frequency acoustic information ； bimodal hearing ； normal hearing experiment