Method for measuring sound absorption coefficient by virtue of cepstrum
The invention discloses a method for measuring a sound absorption coefficient by virtue of a cepstrum. The method comprises the steps: applying a sound absorption material on a rigid wall, arranging a loudspeaker just in just front of the sound absorption material, reflecting a sound wave sent by th...
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Main Author | |
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Format | Patent |
Language | Chinese English |
Published |
16.04.2014
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Subjects | |
Online Access | Get full text |
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Summary: | The invention discloses a method for measuring a sound absorption coefficient by virtue of a cepstrum. The method comprises the steps: applying a sound absorption material on a rigid wall, arranging a loudspeaker just in just front of the sound absorption material, reflecting a sound wave sent by the loudspeaker by virtue of the sound absorption material so as to obtain sound pressure at a microphone, converting the obtained sound pressure to the cepstrum, and comparing the cepstrum with a cepstrum which is obtained by converting sound pressure measured by the microphone after the sound absorption material is removed to obtain a reflection coefficient of the sound absorption material, so as to obtain the sound absorption coefficient of the sound absorption material. With the adoption of the method, the disadvantages of a conventional standing wave pipe method and a conventional reverberation chamber method for measuring the sound absorption coefficient of the sound absorption material are overcome, and a simp |
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Bibliography: | Application Number: CN20131743195 |