Means for acoustical correction and noise absorption

作者: Heath Wilfrid Paul

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参考文章(10)
Harry F Olson, Diffraction type sound absorber ,(1943)
Henry A Gorman, Wall finishing material ,(1930)
Cloyd D Smith, Carl W Lemmerman, Combined lighting and sound absorbing fixture ,(1949)
Lionel H Macdonald, Sound absorbing construction ,(1936)
Leon J Sivian, Eual H Bedell, Sound-absorbing unit ,(1937)