VIBRO ACOUSTIC COVER USING EXPANDED PTFE COMPOSITE

An acoustically reactive composite can include an expanded polytetrafluoroethylene (ePTFE) membrane formed of a highly fibrillated ePTFE microstructure with an elastomer fully impregnated within the ePTFE membrane. The composite can have an acoustic loss of less than 7 dB at 1 kHz and a water entry...

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Bibliographic Details
Main Authors KENALEY, RYAN, BINETTI, VALERIE REGINA
Format Patent
LanguageEnglish
French
Published 05.01.2017
Subjects
ACOUSTICS
ACOUSTICS NOT OTHERWISE PROVIDED FOR
DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL
MUSICAL INSTRUMENTS
PHYSICS
PUBLIC ADDRESS SYSTEMS
SOUND-PRODUCING DEVICES
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Summary:An acoustically reactive composite can include an expanded polytetrafluoroethylene (ePTFE) membrane formed of a highly fibrillated ePTFE microstructure with an elastomer fully impregnated within the ePTFE membrane. The composite can have an acoustic loss of less than 7 dB at 1 kHz and a water entry pressure (WEP) of at least 20 PSI. A layered assembly for protecting an acoustic device can include an acoustically reactive composite as described above and an adhesive layer arranged to define an acoustic cavity. An acoustic device can incorporate an acoustically reactive composite or layered assembly as described above, with the acoustically reactive composite or layered assembly arranged to span an acoustic cavity proximate to a transducer of the acoustic device.
Bibliography:Application Number: CA20162991587