55 舒適響度範圍(range of comfortable loudness)或稱動態聽力範圍(dynamic range for speech),
介於何者之間?
(A)語音聽辨閾值(speech recognition threshold, SRT)與不舒適響度等級(uncomfortable loudness level, UCL)
(B)最舒適的響度等級(most comfortable loudness level, MCL)與 UCL
(C) SRT 與 MCL
(D)純音聽閾值與 SRT