# US 2006/0188121 A1 · Headphone device

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- Number: US 2006/0188121 A1
- Document ID: US20060188121A1
- Status: Published application
- Kind: A1
- Application number: 10/560,892
- Filed: 2005-04-14
- Published: 2006-08-24
- Earliest claimed: 2004-04-16
- Assignees: Sony Corporation
- Inventors: Naotaka Tsunoda
- Web page: https://patentgrep.com/patent/US20060188121A1

## CPC

- H04R 1/1008: {Earpieces of the supra-aural or circum-aural type}
- H04R 1/1058: {Manufacture or assembly}
- 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 unit including a back housing provided at the rear of a driver unit and a baffle portion provided at the front thereof. In the headphone apparatus, the baffle portion, which is formed to surround a space except a front opening portion of a driver unit, and/or the back housing portion, which is formed to cover the back surface of the driver unit, are formed using the air-permeable porous material.

## Claims

### Claim 1

A headphone apparatus wherein a baffle portion formed to surround a space except a front opening portion of a driver unit and/or a back housing portion formed to cover the back surface of said driver unit is formed using an air-permeable porous material.

### Claim 2 (depends on 1)

A headphone apparatus according to claim 1, wherein said baffle portion is approximately cone-shaped.

### Claim 3 (depends on 1)

A headphone apparatus according to claim 1, wherein an opening is made in the back surface of said back housing.

### Claim 4 (depends on 1)

A headphone apparatus according to claim 1, wherein chemical fiber unwoven fabric is used as said air-permeable porous material.

### Claim 5 (depends on 1)

A headphone apparatus according to claim 1, wherein cellulose based material is used as said air-permeable porous material.

### Claim 6 (depends on 1)

A headphone apparatus according to claim 1, wherein said driver unit is provided in a bridge portion shaped like an arch forming a bridge to a rim which forms a frame.

### Claim 7 (depends on 2)

A headphone apparatus according to claim 2, wherein the cone shape of said baffle portion is asymmetrical with respect to the axis of the cone.

### Claim 8 (depends on 4)

A headphone apparatus according to claim 4, wherein said chemical fiber unwoven fabric is combined with a porous material such as cloth through an air-permeable adhesive layer to stabilize the shape thereof.

### Claim 9 (depends on 5)

A headphone apparatus according to claim 5, wherein said cellulose based material is combined with a porous material such as cloth through an air-permeable adhesive layer to stabilize the shape thereof.

### Claim at position 10 (depends on 1)

10 A headphone apparatus according to claim 1, wherein a microphone device is attached to said headphone apparatus.