Noise-reducing earmuff
US11141315B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2017 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Dec 19, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F11/145
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present disclosure discloses a noise-reducing earmuff, comprising: an earmuff shell forming an earmuff cavity; a separator being installed in the earmuff cavity and forming an independent chamber; and a conduit being installed on the separator, the conduit being provided with an opening at each of the two ends thereof; wherein one of the openings being located in the chamber, and the other extending out of the chamber and being located in the earmuff cavity; wherein the chamber and the conduit form a low-frequency resonator whose resonance frequency is equivalent to a corner frequency of a low-pass filter formed by the earmuff.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.