Earphone having damped ear canal resonance
US10182287B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2016 |
| Grant date | Jan 15, 2019 |
| Priority date | — |
| Expiry date | Apr 27, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An earphone includes an electro-acoustic transducer and an earphone assembly. The electro-acoustic transducer is configured to generate an acoustic signal in response to an electrical signal. The earphone assembly has an inner surface and an earphone acoustic opening. The electro-acoustic transducer is disposed inside the earphone assembly and defines a front cavity between the electro-acoustic transducer and the earphone acoustic opening along a first portion of the inner surface and a back cavity between the electro-acoustic transducer and a second portion of the inner surface. The earphone assembly further includes an acoustic impedance branch having an impedance aperture in acoustic communication with the front cavity. The acoustic impedance branch includes an acoustic resistive element and a branch volume that reduce a resonance at a first resonance frequency for an occluded ear canal defined by the front cavity of the earphone assembly and an ear canal of a user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.