Gabrielsson A, Schenkman B N, Hagerman B
Department of Technical Audiology, Karolinska Institute, Stockholm.
J Speech Hear Res. 1988 Jun;31(2):166-77. doi: 10.1044/jshr.3102.166.
Four speech programs and two music programs were reproduced using five different frequency responses: one flat and the others combinations of reductions at lower frequencies and/or increases at higher frequencies. Twelve hearing impaired (HI) and 8 normal hearing (NH) subjects listened monaurally to the reproductions at comfortable listening level and judged the sound quality on seven perceptual scales and a scale for total impression. Speech intelligibility was measured for phonetically balanced (PB) word lists and for sentences in noise. Significant differences among the reproductions appeared in practically all scales. The most preferred system was characterized by a flat response at lower frequencies and a 6 dB/octave increase thereafter. There were certain differences between the NH and HI listeners in the judgments of the other systems. The intelligibility of PB word lists did not differ among the systems, and the S/N threshold for the sentences in noise only distinguished the flat response as worse than all others for the HI listeners. There was little correspondence between intelligibility measures and sound quality measures. The latter provided more information and distinctions among systems.
一种是平坦的，其他的是低频降低和/或高频增加的组合。12名听力受损（HI）受试者和8名听力正常（NH）受试者以舒适的聆听水平单耳聆听这些再现，并在七个感知尺度和一个总体印象尺度上对声音质量进行评判。对语音平衡（PB）单词列表和噪声中的句子进行了语音清晰度测量。在几乎所有尺度上，再现之间都出现了显著差异。最受欢迎的系统的特点是低频响应平坦，此后每倍频程增加6分贝。在对其他系统的评判中，NH和HI听众之间存在一定差异。PB单词列表的清晰度在各系统之间没有差异，对于HI听众来说，噪声中句子的信噪比阈值仅将平坦响应区分得比所有其他响应都差。清晰度测量和声音质量测量之间几乎没有对应关系。后者提供了更多关于系统的信息和区分。
