根據噪音能量分布以進行助聽器交越頻率參數調整之效果比較

Comparison of the Effect of Crossover Frequency Setting with Noise Energy Distribution for Hearing Aids

王中成(Jhong-Cheng Wang)

指導教授 ： 林俊宏

崑山科技大學/工程學院/電子工程研究所/碩士(2012年)

https://doi.org/10.6828/KSU.2012.00032

摘要

對於聽損族群而言，配戴助聽器都是為了增加與周遭溝通的便利性，這其中適當的助聽器配合良好的助聽器參數是整體的關鍵。助聽器已然非單純的聲音放大器，必須適合配戴者、給予良好的聲音品質與正確的資訊，在安靜的對談中是如此，在吵雜的環境下亦是如此。國內外許許多多針對助聽器的研究，都確認了助聽器參數的設定對於配戴者有一定程度的影響，而這類參數研究中以壓縮參數最為大宗，壓縮參數控制著整體輸出聲音的表現情況，其中對於頻道切割的控制各家觀點均不相同，交越頻率即是此頻道切割的重要參數。因此，本研究將針對噪音能量的分布，調整壓縮頻道的位置，做出有效的噪音抑制，並利用主觀、客觀語音評估方式驗證此方法的可行性。結果顯示，此種根據噪音能量分布為依據的壓縮頻道控制方式，在客觀語音評估中得出相當程度的抑制能力，並從主觀語音評估中確定策略在噪音環境下語音訊息保留的成效。

關鍵字

交越頻率 ； 訊噪比 ； 聲音感受度

並列摘要

For hearing-loss group, wearing hearing aids is expected to increase the convenience to communicate with others. Appropriate hearing aids with favorable hearing aid parameters are the key point, as hearing aids are not simply a sound amplifier, but have to be suitable for the users and provide good sound quality and correct information in both quiet conversation and noisy environments. A lot of research on hearing aids confirmed the effects of parameter settings on the users. Most of such research on parameters focused on compressed parameters, which controlled the performance of output sound. In this case, the control of compressed parameters should be adjustable according to the users, in which distinct opinions appeared on the control of channel cutting. Crossover Frequency is a primary parameter for channel cutting. Aiming at the distribution of noise energy, this study adjusts the location of compression channel for effective noise suppression. In the research, subjective and objective voice evaluations are evaluated the feasibility. Such a control of compression channel based on the distribution of noise energy reveals certain suppression in objective voice evaluation, and is also confirmed by the participants in subjective voice evaluation. It ensures the effects of remaining voice message in noisy environments.

並列關鍵字

Crossover Frequency ； SNR ； Sound Quality

參考文獻

[29]鍾譯賢，「助聽器的噪音消除演算法」，國立交通大學，民國99年3月

[27]曾雪靜，「助聽器壓縮潛時對於漢語語音和聲調聽辨力的影響」，國立台北護理學院，民國95年7月

[6]Martin, R.L., “How we can turn the market around,” The Hearing Journal, 56(9), pp.56-58,2003.

[14]Snell, K. & Frisina, R. D., “Relationships among age related differences in gap detection and speech perception,” Journal of the Acoustical Society of American, Vol. 107, 2000, pp. 1615-1626.

[18]Kochkin S., “Why my hearing aids are in the drawer,” The Hearing Journal, Vol.53(2), 2000, pp. 34-42.