Acoustics – Sound-modifying means – Space absorbers
Patent
1996-07-24
1999-04-06
Dang, Khanh
Acoustics
Sound-modifying means
Space absorbers
342 4, E04B 182, H01Q 1700
Patent
active
058921885
ABSTRACT:
A wave absorber is provided which has a wave absorption characteristic of 20 dB in a frequency band of 1 GHz to 20 GHz, is nonflammable, compact and lightweight, and has excellent durability. A porous ferrite is produced as the base material for which is an Ni--Zn type ferrite which has an excellent wave absorption characteristic in the high frequency range, and this serves as a wave absorber formed in the shape of a pyramid or triangular prism.
Hayashi Toshikatsu
Kawamoto Hiroshi
Dang Khanh
Kabushiki Kaisha Riken
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