Cox R M, Alexander G C
Department of Audiology and Speech Pathology, Memphis State University, Tennessee.
Ear Hear. 1991 Apr;12(2):123-6. doi: 10.1097/00003446-199104000-00008.
Thirty-three hearing-impaired individuals were each fitted with three hearing aids. The instruments conformed to three frequency-gain prescriptions, differing by a total of 8 dB/octave, with the middle prescription derived using the MSU version 3.0 procedure. The subjects were divided into three matched groups of eleven. Each group used the fitted hearing aids in one of three everyday listening environments representing quiet, reverberant, and noisy situations, respectively. In each listening environment, preferred hearing aid gain for conversationally produced speech was measured in each hearing aid condition for each subject. Preferred gain in daily listening situations was compared to prescribed gain. Results indicated that: (1) preferred gain averaged across all three environments was about equal to prescribed gain, (2) mean preferred gain in each separate environment was substantially different from the prescribed level, (3) volume control adjustments of about +/- 8 dB relative to the prescribed level would be necessary to accommodate the preferred gain settings of the typical hearing aid wearer in daily life. Guidelines are presented for establishing recommended volume control settings for hearing aid users who may be unable to set the volume control independently.
33名听力受损者每人佩戴了三台助听器。这些仪器符合三种频率增益处方，总共相差8 dB/倍频程，中间的处方是使用密歇根州立大学3.0版程序得出的。受试者被分成三组，每组11人，且三组相互匹配。每组分别在代表安静、混响和嘈杂环境的三种日常聆听环境之一中使用所佩戴的助听器。在每种聆听环境中，针对每个受试者的每种助听器状况，测量用于对话语音的首选助听器增益。将日常聆听情况下的首选增益与规定增益进行比较。结果表明：（1）所有三种环境下的平均首选增益约等于规定增益；（2）每种单独环境中的平均首选增益与规定水平有很大差异；（3）相对于规定水平，大约需要进行±8 dB的音量控制调整，以适应日常生活中典型助听器佩戴者的首选增益设置。针对可能无法独立设置音量控制的助听器用户，给出了建立推荐音量控制设置的指导原则。
