Earplug for insertion into an auditory duct
US8155338B2 · kind B2 · utility
2Cited by
1References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2007 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Mar 1, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An earplug is described for insertion in an auditory duct. The earplug includes a loudspeaker for connection to a playback device. When inserted in a user's ear, the loudspeaker is in acoustic communication with the ear's canal. A transmitter is provided that transmits ambient sound to the ear canal with an adjustable damping level. A regulating unit regulates a damping level depending on detection of control signals to the loudspeaker. When the user does not listen to, for instance, music of the playback device, the user can simply observe ambient sounds without removing the earplug from the ear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.