Titlebook: Engineering Acoustics; An Introduction to N Michael M?ser Textbook 20092nd edition Springer-Verlag Berlin Heidelberg 2009 Wave.environment.

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修飾語

IDEAS

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Silencers,Generally speaking, silencers are technical devices which attenuate a sound field travelling through them along its propagation path.

勉強(qiáng)

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Fundamentals of wave propagation,titive sound incidences, such as a child bouncing a ball, hammering at a construction site, etc., a time delay can easily be observed between the optical perception and the arrival of the acoustic signal. This time delay increases with increasing distance between the observer and the source.

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Structure-borne sound,erm ‘structure-borne sound’. Structure-borne sound has major importance with respect to solving noise control problems: the air-borne sound into (or from) the aforementioned solid structures is caused by motion in the structure’s surface. In many cases it is the structure-borne sound that is respons