Sound-absorbing material
US9514732B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2016 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Jan 28, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B2001/742
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sound-absorbing material has a membrane having multiple piezoelectric fibers, the fiber density of the membrane is below 50 g/m2, the thickness of the membrane is below 1 mm, sound-absorbing coefficient of the membrane is larger than 0.1 at absorbing frequency at 100 Hz+/−10%, and the sound-absorbing coefficient of the membrane is over 0.05 at absorbing frequency at 800 Hz to 1000 Hz. PVDF electrospinning nanofiber membranes of the present invention are thinner and more flexible compared to conventional sound-absorbing material, the membranes in the present invention performs excellent low frequency sound absorption with very thin membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.