問題詳情
1 方向性麥克風通常在助聽器上有兩個麥克風，比較聲音訊號到達此二麥克風之時間，可得到外部時間差（external time delay）及內部時間差（internal time delay），當這兩個時間差相等時，此方向性麥克風之極向圖（polar diagram）應為以下那一種？
(A)類心型（Cardioid）
(B)超類心型（Super-cardioid）
(C)高類心型（Hyper-cardioid）
(D)雙向型（Bi-directional）或稱八字型（Figure 8）
(A)類心型（Cardioid）
(B)超類心型（Super-cardioid）
(C)高類心型（Hyper-cardioid）
(D)雙向型（Bi-directional）或稱八字型（Figure 8）
參考答案
答案：A
難度：非常困難0.125
統計：A(1),B(0),C(0),D(3),E(0)
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