Comodulation masking release over a three octave range.
Comodulation masking release over a three octave range.
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共调制掩蔽在三个八度范围内释放。
DOI：
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发表时间：
1991
影响因子：
2.4
通讯作者：
M. F. Cohen
中科院分区：
文献类型：
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作者：
M. F. Cohen
以常规方式测量可变频率50 ms短纯音信号的共调掩蔽释放（CMR），但100 Hz宽掩蔽带的总电平以20 dB步长从18 dB SPL变化到78 dB SPL。100 Hz宽的提示频带保持在1000 Hz的中心，总体水平为78 dB SPL。呈现为单耳或双耳分听，提示带仅呈现给非信号耳。平均结果显示，当掩蔽频带/信号以8000 Hz为中心或远离提示频带30 ° C时，单声道CMR值高达7 dB，而当其远离20 ° C时，单声道CMR值高达11 dB。当两个噪声带的电平相等时，所有频率间隔的CMR都减小。两分性呈现导致CMR稍微较小，并且较少依赖于两个噪声带的相对水平。
Comodulation masking release (CMR) for a variable frequency 50‐ms tone‐burst signal was measured in the usual manner, except that the overall level of the 100‐Hz‐wide masker band was varied from 18 to 78 dB SPL in 20‐dB steps. The 100‐Hz‐wide cue band, which remained centered at 1000 Hz, was presented at an overall level of 78 dB SPL. Presentation was either monotic or dichotic, with the cue band presented to the nonsignal ear only. Averaged results show monotic CMR values as high as 7 dB when the masker band/signal was centered at 8000 Hz, or 3 oct away from the cue band, and 11 dB when it was 2 oct away. CMR for all frequency separations was reduced when the two noise bands were equal in level. The dichotic presentation resulted in a CMR that was somewhat smaller, and less dependent on, the relative levels of the two noise bands.