Brey R H, Robinette M S, Chabries D M, Christiansen R W
Department of Education Psychology, Brigham Young University, Provo, Utah 84602.
J Rehabil Res Dev. 1987 Fall;24(4):75-86.
It is well known that communication in noisy environments with reverberation present is a difficult problem to solve, particularly for the hearing-impaired listener. Two-microphone noise cancelling using an LMS adaptive filter in real time was used to process speech recorded in the presence of speech-spectrum noise at six different signal-to-noise ratios, -8, -4, 0, 4, 8, and 12 dB. Twelve normal-hearing and 11 sensorineural hearing-impaired subjects were tested. Results indicated mean improvement of 37.34 percent for the 12 normal-hearing subjects and 38.3 percent for 5 of the sensorineural hearing-impaired subjects. Individual data for the 5 remaining hearing-impaired subjects revealed severe speech intelligibility deficits when noise and reverberation contaminated the speech signal. It is proposed that rehabilitative audiological assessments include evaluation of an individual's ability to cope with reverberation and noise.
众所周知，在存在混响的嘈杂环境中进行通信是一个难以解决的问题，特别是对于听力受损的听众而言。使用LMS自适应滤波器实时进行双麦克风噪声消除，用于处理在六种不同信噪比（-8、-4、0、4、8和12分贝）下存在语音频谱噪声时录制的语音。对12名听力正常的受试者和11名感音神经性听力受损的受试者进行了测试。结果表明，12名听力正常的受试者平均改善了37.34%，5名感音神经性听力受损的受试者平均改善了38.3%。其余5名听力受损受试者的个体数据显示，当噪声和混响污染语音信号时，存在严重的言语可懂度缺陷。建议康复听力评估包括评估个体应对混响和噪声的能力。
