BOARD WHICH ABSORBS ACOUSTIC POWER OF LOW, MEDIUM AND HIGH FREQUENCY, IN PARTICULAR, IN FREQUENCY RANGE OF 400-5000 HZ Russian patent published in 1998 - IPC

Abstract RU 2106021 C1

FIELD: construction. SUBSTANCE: device has plate 1, which is made from semi-rigid foam material with open and communicating pores, and layer 2 which is made from joined fibers or soft porous material. Set of these layers operates as "body-spring". EFFECT: increased functional capabilities. 9 cl, 2 dwg

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RU 2 106 021 C1

Authors

Alen Manigold[Fr]

Dates

1998-02-27—Published

1994-08-05—Filed