# US 9,438,989 B2 · Headphone structure for adjusting audio frequencies

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- Number: US 9,438,989 B2
- Document ID: US9438989B2
- Status: Granted
- Kind: B2
- Application number: 14/529,179
- Filed: 2014-10-31
- Published: 2015-12-31
- Granted: 2016-09-06
- Earliest claimed: 2014-06-27
- Assignees: Huiyang Dongmei Audio Products Co., Ltd.
- Applicants: Huiyang Dongmei Audio Products Co., Ltd.
- Inventors: Ming-Chung Chu; Ping-Tang Lee
- Web page: https://patentgrep.com/patent/US9438989B2

## CPC

- H04R 1/2811: {for loudspeaker transducers}
- H04R 1/10: Earpieces; Attachments therefor {; Earphones; Monophonic headphones (H04R1/28 takes precedence; stereophonic headphones H04R5/033)}
- H04R 1/1016: {Earpieces of the intra-aural type}
- H04R 1/1058: {Manufacture or assembly}
- H04R 1/22: for obtaining desired frequency characteristic only {(circuit for combining transducers having different responses H04R3/00; for hearing aids H04R25/407)}
- H04R 25/48: {using constructional means for obtaining a desired frequency response (H04R25/652 takes precedence)}
- H04R 25/652: {Ear tips; Ear moulds (hybrid ear moulds or post-processing thereof for their customisation H04R25/659)}
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)

## Abstract

A headphone structure for adjusting audio frequencies is provided, which comprises a front housing, a rear housing, a sound-producing unit in the front housing and an elastic ear-contacting body sleeving the front housing. The front housing has at least one slot or recess, and the elastic ear-contacting body sleeves the front housing to form at least one gap. The headphone structure for adjusting audio frequencies of the present invention has better results for the adjustment of bass frequencies. In addition, the headphone structure of the present invention is not complicated and is easy to manufacture. The headphone structure of the present invention can be applied to various types of headphone, such as in-ear headphones and circumaural headphones.

## Claims

### Claim 1

A headphone structure for adjusting audio frequencies, comprising a front housing, a rear housing, a sound-producing unit in the front housing and an elastic ear-contacting body sleeving the front housing, the headphone is an in-ear headphone, the elastic ear-contacting body is an elastic plug, characterized in that the front housing is provided with at least one slot or recess, and the elastic plug sleeves the front housing to form at least one gap;
the elastic plug is provided with a base ring, the base ring is provided with a concave-convex structure at the bottom thereof, the front housing is provided with a concave-convex step for engaging with and abutting against the concave-convex structure of the base ring, the concave-convex step is provided with a concave-convex step, by adjusting a fluctuation degree of the concave-convex portion of the concave-convex step, the size of the gap can be adjusted.

### Claim 2 (depends on 1)

The headphone structure for adjusting audio frequencies as claimed in claim 1, characterized in that the in-ear headphone further comprises a mesh cap for covering the front housing of the headphone.