Earpiece, Electronic Device and Communication Device

• US 20080279411A1
• Filed: 03/31/2006
• Published: 11/13/2008
• Est. Priority Date: 04/01/2005
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Suzuki, Shinya, Takahashi, Emi, Inoue, Yukinari
• Granted Patent: US 8,121,301 B2
• Time in Patent Office: Days
• US Class Current: 381/386
• CPC Class Codes: H04M 1/035 Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities
• CPC Class Codes: H04R 2499/11 Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
• CPC Class Codes: H04R 3/04 for correcting frequency response
• CPC Class Codes: H04R 7/02 characterised by the construction
• CPC Class Codes: H04R 7/16 Mounting or tensioning of diaphragms or cones

Abstract

An earpiece, an electronic device, and a communication device, capable of reducing the influence of leakage of sounds from a clearance between the earpiece and an ear not to need an addition of parts are provided. An earpiece (100) includes an electromechanical acoustic transducer (10) having a diaphragm and for generating a sound by vibrating the diaphragm in response to an electric signal, a case (11) on which a sound hole (12) is provided and in which the electromechanical acoustic transducer (10) is housed, and a holding member (13) for holding the electromechanical acoustic transducer (10) in the case (11). The electromechanical acoustic transducer (10) has a sound pressure-frequency characteristic that is compensated in advance such that the sound pressure-frequency characteristic is planarized in a condition that the generated sound is leaked from a user'"'"'s ear (14) being covered with the case (11).

Claims

1. An earpiece, comprising:

an electromechanical acoustic transducer that has a diaphragm, and generates a sound by vibrating the diaphragm in response to an electric signal;

a case that contains the electromechanical acoustic transducer;

a sound hole that is provided at a position of the case so as to face to the electromechanical acoustic transducer; and

a holding member that holds the electromechanical acoustic transducer in the case, and surrounds a periphery of the sound hole,

wherein the electromechanical acoustic transducer compensated a sound pressure-frequency characteristic based on a difference between the sound pressure-frequency characteristic derived when the sound is leaked from a gap between an ear and the case and the sound pressure-frequency characteristic derived when no sound is leaked.

3. The earpiece according to claim 1, wherein the sound pressure-frequency characteristic is compensated such that a lowest resonance frequency is lowered.

4. The electronic device comprising the earpiece set forth in claims 1.

2. (canceled)

5. A communication device, comprising:

an antenna that receives a radio signal;

a signal outputting portion that outputs an electric signal in response to the received radio signal;

an electromechanical acoustic transducer that has a diaphragm, and generates a sound by vibrating the diaphragm in response to the electric signal being output from the signal outputting portion;

a case that contains the electromechanical acoustic transducer;

a sound hole that is provided at a position of the case so as to face the electromechanical acoustic transducer; and

a holding member that holds the electromechanical acoustic transducer in the case, and surrounds a periphery of the sound hole

wherein the electromechanical acoustic transducer compensates a sound pressure-frequency characteristic based on a difference between the sound pressure-frequency characteristic derived when the sound is leaked from a gap between an ear and the case and the sound pressure-frequency characteristic derived when no sound is leaked