Marine vessel noise attenuating structure

Details Marine vessel noise attenuating structure Marine vessel noise attenuating structure

1978-12-15

1980-07-15

Hix, L. T.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181224, 181212, 181282, E04F 1704

Patent

active

042122597

ABSTRACT:
The exhaust or the inlet duct of a marine gas turbine engine power plant installation comprises a porous duct, a plurality of circumferentially arranged non-porous channel members attached to and axially spaced along the porous duct, the channel members and the porous duct together defining a plurality of annular noise attenuating cells, and at least one layer of heat insulating material surrounding the channel members, the insulating material being contained with a cover and attached to the porous duct.

REFERENCES:
patent: 3437173 (1969-04-01), Ehrich
patent: 3819009 (1974-06-01), Motsinger
patent: 4035535 (1977-07-01), Taylor
patent: 4091892 (1978-05-01), Hehmann et al.
patent: 4101280 (1978-07-01), Frietzsche et al.
patent: 4106587 (1978-08-01), Nash et al.

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