Acoustic composite including a stiffening polymer, devices, and assemblies including the same
US12377388B2 · kind B2 · utility
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10References
16Claims
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Key dates
| Filing date | Oct 14, 2019 |
| Grant date | Aug 5, 2025 |
| Priority date | — |
| Expiry date | May 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/086
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite that includes an expanded polytetrafluoroethylene (ePTFE) membrane having a porous microstructure. The porous microstructure of the ePTFE membrane is impregnated with a stiffening polymer. An acoustic device assembly that includes the composite and an acoustic device is also described. The composite and the acoustic device assembly can exhibit an insertion loss of less than 7 dB at 1 kHz when measured by the Acoustic Response Measurement (“ARM”) Test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.