日本水産学会誌
Online ISSN : 1349-998X
Print ISSN : 0021-5392
マコガレイの背景雑音によるマスキング
張 国勝平石 智徳山本 勝太郎梨本 勝昭
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1998 年 64 巻 6 号 p. 987-992

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Using a classical cardiac conditioning technique, the auditory thresholds of marbled sole Pleuronectes yokohamae were measured in the presence of masking noise in the spectrum level range of 70-90dB re 1μPa/√Hz. Critical ratios (signal-to-noise ratio) were approximately 27dB at 60-100Hz and 32-58dB at 150-700Hz. The ratio increased almost linearly with increasing frequency. The noise spectrum level at the start of masking was 62-70dB within the frequency range of 60-700Hz. This suggests that hearing of the marbled sole is masked in the natural environment with the noise spectrum level above 70dB.

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