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In the image formation device the noise aural masking device and the noise aural masking manner
In the image formation device the noise aural masking device and the noise aural masking manner
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机译:图像形成装置中的噪声听觉掩蔽装置和噪声听觉掩蔽方式
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摘要
A noise masking system in an image forming apparatus such as a laser beam printer or a copying machine having a drive mechanism acting as a noise generation source during operation, the noise masking system comprising a masking sound generator for generating a sound to mask the noise and masking sound control device which controls the masking sound generator to generate a masking sound of a frequency range including a main-component frequency of the noise. The masking sound thus generated is of a frequency range from a lower-limit frequency to an upper-limit frequency in a critical band of the main-component frequency of the noise. The noise masking system masks noise without decreasing the sound pressure of the noise.
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