Verhey Jesko L, Anweiler Anne-Kristin, Hohmann Volker
AG Neurosensorik, Institut für Physik, Carl von Ossietzky Universität, Oldenburg, Germany.
Int J Audiol. 2006 May;45(5):287-94. doi: 10.1080/14992020500485692.
Spectral loudness summation was measured for 10- and 1000-ms long bandpass-noise signals with bandwidths in the range of 0.2 to 6.4 kHz centered at 2 kHz for nine listeners with hearing impairment of primarily cochlear origin. Loudness matches between signals with the same duration and different bandwidth were obtained using an adaptive two-interval, two-alternative forced-choice procedure with interleaved tracks. The 3200-Hz wide reference signal had a level of 45 dB or 65 dB SPL. Every signal was individually frequency equalized prior to presentation in order to ensure audibility of all spectral components for the two reference input levels. Generally the same amount of spectral loudness summation for 10- and 1000-ms long signals was obtained for both reference levels. However, some hearing-impaired listeners show, similarly to normal-hearing listeners, a larger spectral loudness summation for short than for long duration signals, indicating that duration effects in spectral loudness summation are caused by retrocochlear processes.
对九名主要为耳蜗性听力损失的听力受损受试者，测量了带宽在0.2至6.4 kHz范围内、以2 kHz为中心的10毫秒和1000毫秒长的带通噪声信号的频谱响度总和。使用具有交错轨迹的自适应双间隔、双选强制选择程序，获得了相同持续时间和不同带宽信号之间的响度匹配。3200赫兹宽的参考信号声压级为45分贝或65分贝声压级。每个信号在呈现之前都进行了单独的频率均衡，以确保两个参考输入电平下所有频谱成分都能被听到。一般来说，两个参考电平下10毫秒和1000毫秒长信号的频谱响度总和量相同。然而，一些听力受损的受试者与正常听力的受试者类似，短持续时间信号的频谱响度总和比长持续时间信号更大，这表明频谱响度总和中的持续时间效应是由蜗后过程引起的。
