The study explores the minimal intensity gain of high priority tone signals presented on the background of speech communication at three noise levels of 60,70 and 80 dB(A).

• 本研究用绝对辨认法与信号清晰度和响度适宜性主观评价测试了60、70和 80db(A)三种噪声水平下与言语通讯同时呈现的高优先权音调信号的最小强度增量要求。