27 無限頻道（channel-free）助聽器與寬廣動態範圍壓縮（WDRC）助聽器相較，前者具備下列那一項 優點？
(A)佩戴者在吵雜環境中的子音聽辨率顯著優於多頻道寬廣動態範圍壓縮助聽器
(B)不會產生返饋音
(C)訊號處理的時間延遲較短
(D)特別適合初次佩戴助聽器的個案使用

答案：登入後查看
統計： A(105), B(9), C(169), D(23), E(0) #2045869

詳解 (共 4 筆)

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Ø以下內容擷取自DOI: 10.3766/jaaa.24.2.6

1.          多通道寬動態範圍壓縮 (WDRC) 和 ChannelFree 處理具有相似的目標，但在信號處理方面存在顯著差異

2.  Multichannel WDRC devicesdivide the input signal into separate frequency bands; a separate level is determined within each frequency band; a separate level is determined within each frequency band; and compression in each band is based on the level within each band

3.  ChannelFree processing detects the wideband level, and gain adjustments are based on the wideband signal level

A說明：利用Pascoe’s High-Frequency Word List測試兩種助聽器下的辨識正確率結果：Pascoe’s HFWL in quiet and the Pascoe’s HFWL in noise results indicated that scores for the WDRC and ChannelFree instruments were significantly better than unaided scores; however, scores were not significantly different between the WDRC and ChannelFree instruments.

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