Christen R, Byrne D
Scand Audiol. 1980;9(1):3-10. doi: 10.3109/01050398009076328.
The Most Comfortable Loudness Level (MCL) was measured for 24 normal-hearing subjects, using narrow bands of speech having centre frequencies of 0.25, 0.5, 1.2 and 4kHz. MCL's were equivalent for octave band and one-third octave band stimuli. The sensation levels (SL) for various frequencies closely matched the SL of the 60 phon equal loudness contour for pure tones. It was concluded, for levels around MCL, sounds which are equally comfortable are equally loud and that equal loudness contours for pure tones are also applicable to narrow bands of speech. Some implications for hearing aid selection are discussed. However, this investigation was primarily a preliminary to other studies more directly related to hearing aid selection issues.
使用中心频率为0.25、0.5、1.2和4kHz的窄带语音，对24名听力正常的受试者测量了最舒适响度水平（MCL）。对于倍频程带和1/3倍频程带刺激，MCL是等效的。不同频率的感觉水平（SL）与纯音60方等响度轮廓的SL紧密匹配。得出结论，对于接近MCL的水平，同样舒适的声音响度相同，并且纯音的等响度轮廓也适用于窄带语音。讨论了对助听器选择的一些影响。然而，这项研究主要是其他与助听器选择问题更直接相关研究的初步探索。
