金鱼（Carassius auratus）中声源定位和调制掩蔽的信噪比。
Signal-to-noise ratio for source determination and for a comodulated masker in goldfish, Carassius auratus.
机构信息
Department of Psychology, Loyola University Chicago, 6525 North Sheridan Road, Chicago, Illinois 60626, USA.
出版信息
J Acoust Soc Am. 2011 May;129(5):3367-72. doi: 10.1121/1.3562179.
The masking effects of white and amplitude comodulated noise were studied with respect to simple signal detection and sound source determination in goldfish. A stimulus generalization method was used to determine the signal-to-noise ratio required to completely determine the signal's characteristics. It was found that the S∕N required for this determination is about 4 dB greater than that required for signal detection, or was about 4 dB greater than the critical masking ratio. This means that the potential harm to fish of a given masking noise is at least 4 dB greater than previously thought, based on critical masking ratios. However, for amplitude comodulated noise between 10 and 50 Hz modulation rate, the potential harmful effects are up to 5.3 dB less than would be predicted from the critical masking ratio for unmodulated noise.
本研究采用掩蔽效应测试方法，通过对金鱼进行简单信号检测和声源定位实验，分析了白噪声和幅度调制噪声的掩蔽效应。使用刺激泛化方法确定了完全确定信号特征所需的信噪比。研究发现，这种确定所需的信噪比比信号检测所需的信噪比高约 4 dB，或比临界掩蔽比高约 4 dB。这意味着，基于临界掩蔽比，与给定掩蔽噪声相比，鱼类受到的潜在危害至少大 4 dB。然而，对于调制率为 10 至 50 Hz 的幅度调制噪声，与未调制噪声的临界掩蔽比相比，潜在的有害影响最多可降低 5.3 dB。
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