Simultaneousmasking which is an important research content of psychoacoustic, have a wide range of applications in audio coding, speech enhancement and so on.
同时掩蔽是心理声学的重要研究内容，在音频压缩编码、语音增强等方面有着广泛的应用。
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Experiments on simultaneous mask effect where tones were masked by narrow-band noises with different SPL showed that the masking curve could be approximated as two segments of straight line.