Acoustics – Sound-modifying means – Sound absorbing panels
Patent
1978-10-10
1980-12-30
Hix, L. T.
Acoustics
Sound-modifying means
Sound absorbing panels
181286, 181288, 181292, 181294, 428117, 428312, E04B 182
Patent
active
042418062
ABSTRACT:
A laminated noise attenuation panel for both sound absorption and sound transmission loss having as its principal layers an expanded thermoplastic core with alternately inverted cavities, half opening to each side of said core and a sheet of cured resinous material having hollow microspheres with substantially reduced atmospheric pressure randomly dispersed in said resinous material, said cured resinous sheet facing away from the noise source. The cavities of said core panel facing away from said noise source may be filled with cellulose. The side of said core panel toward the noise source may include a laminated layer of a perforated material and a decorative layer. The side of said panel away from the noise source may also include a layer of other materials and a decorative layer. Data for the noise attenuation properties of various combinations of laminations are presented.
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patent: 2363068 (1944-11-01), Leadbetter
patent: 3061491 (1962-10-01), Sherrard et al.
patent: 3549468 (1970-12-01), Messineo et al.
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patent: 3919445 (1975-11-01), Smarok
patent: 4013810 (1977-03-01), Long
patent: 4079162 (1978-03-01), Metzger
Fuller Benjamin R.
Hix L. T,.
Nigohosian Leon
Steinhauser Carl P.
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