Earphone having acoustic impedance branch for damped ear canal resonance and acoustic signal coupling
US10475435B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2018 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Dec 5, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/107
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An earphone includes an earphone assembly and first and second electro-acoustic transducers. The earphone assembly includes an earphone body with an inner surface, an acoustic opening and a cavity defined inside the body by the inner surface and the acoustic opening. The earphone body further includes an acoustic impedance branch, such as a waveguide, that reduces a magnitude of a resonance at a first resonance frequency for an occluded ear canal defined by the cavity of the earphone assembly and an ear canal of a user when the earphone is at least partially inserted into the ear canal. The first electro-acoustic transducer is disposed at the inner surface of the earphone body and is configured to generate a first acoustic signal. The second electro-acoustic transducer is disposed along a length of the acoustic impedance branch and is configured to generate a second acoustic signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.