Headphone with acoustic modulator
US8447058B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2011 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Dec 19, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/1008
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A headphone having a headband and two acoustic transducers disposed at two ends of the headband is disclosed. Each acoustic transducer includes a baffle plate installed with a speaker, a spacer, a vent and an acoustic modulator. The baffle plate and speaker divide the acoustic transducer into a front and a back chamber. The front chamber is configured for communicating with a user's ear. The spacer is disposed behind the speaker to divide the back chamber into a first back chamber and a second back communicated with each other. The vent is disposed in a back wall of the acoustic transducer to communicate the first back chamber with outside. The first acoustic modulator is disposed between the front and second back chambers. The headphone modulates resonance frequency at low frequency bands through the acoustic modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.