Elastomeric acoustic insulator

Details Elastomeric acoustic insulator Elastomeric acoustic insulator

1994-07-25

1996-06-04

Dang, Khanh

Acoustics

Sound-modifying means

Mechanical vibration attenuator

248559, F16F 1500

Patent

active

055235301

ABSTRACT:
An acoustic isolator is incorporated between a noise generating device and a support structure, such as between a transmission housing and an airframe. The isolator has a first fitting which attaches to the noise generating device, and a second fitting which attaches to the support structure, with an acoustic attenuation member disposed therebetween. Preferably, a first elastomer member is disposed between a pair of vertical walls of the first and second fittings. Optionally, a second elastomer member is disposed between an upper surface of the supporting structure and a lower surface of the second fitting such that horizontal loads are reacted therethrough. Alternatively the first and second elastomers comprise a spherical elastomer member and a cylindrical elastomer member in the form of a spherical bearing. The acoustic isolator thus allows rigid attachment of the adjacent structures yet provides acoustic isolation of complex forces which would normally transmit noise through the structure, particularly those from the vertical, lateral and fore/aft directions. Utilizing the inventive acoustic isolator, noise transmission through the support structure can be substantially reduced.

REFERENCES:
patent: 4440375 (1984-04-01), Fukushima et al.
patent: 4456213 (1984-06-01), Fukushima et al.
patent: 4637584 (1987-01-01), Takehara

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