Acoustics – Diaphragm and enclosure – Moisture proof
Reexamination Certificate
2005-08-23
2005-08-23
San Martin, Edgardo (Department: 2837)
Acoustics
Diaphragm and enclosure
Moisture proof
C381S189000, C379S451000, C379S437000
Reexamination Certificate
active
06932187
ABSTRACT:
A protective acoustic cover assembly including a metal foil with perforations, and a treatment on one or more surfaces of said metal foil. The treatment is a hydrophobic or oleophobic treatment, or both. The protective acoustic cover assembly has an average specific acoustic resistance of less than about 11 Rayls MKS from 250-300 Hz, an average specific acoustic reactance magnitude of less than about 1 Rayls MKS from 250-300 Hz, and an instantaneous water entry pressure value of greater than about 11 cm. The perforations of the metal foil preferably have an average maximum pore size of less than about 150 micrometers. The protective acoustic cover assembly further includes an adhesive mounting system, and the preferred metal foil is nickel.
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ASTME 1050-90 (Standard Test Method for Impedance Ab sorption of Acoustical Materials Using a Tube, Two Microphones, and a Digital Frequency Analysis System).
Banter Chad A.
Reis Bradley E.
Gore Enterprise Holdings Inc.
Martin Edgardo San
Wheatcraft Allan M.
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