Electro-acoustic transducer and sound reproducing system

Claim 2

An electro-acoustic transducer comprising an electro-acoustic transducer accommodated in a cabinet, and a sound guide tube for conducting the sound from the electro-acoustic transducer unit out of said cabinet, said sound guide tube being of a lesser diameter than the external acoustic miatus to allow at least the sound radiating end of the sound guide tube to be introduced into the external auditory miatus

Claim 3

the electro-acoustic transducer according to claim 1, wherein said cabinet is formed for covering the rear side of said electro-acoustic transducer unit.

Claim 4

The electro-acoustic transducer according to claim 2, wherein said sound conducting tube is substantially L-­shaped and has it end opposite to said sound radiating and connected to a sound conducting opening provided on the lateral side of said cabinet.

Claim 5

The electro-acoustic transducer according to claim 1, 2 or 3 further comprising supporting means for supporting one of said transducer unit or said sound guide tube such that the sound radiating end of said sound guide tube is at a predetermined position within the external auditory miatus.

Claim 6

The electro-acoustic transducer according to claim 4, wherein said supporting means comprises at least one projection provided at the distal side of said sound conducting tube and adapted to be engaged with an auricular recess.

Claim 7

The electro-acoustic transducer according to claim 4, wherein said supporting means comprises a toroidal member provided at the distal end of said sound guide tube and adapted for being held in the cavity of the concha.

Claim 8

The electro-acoustic transducer according to claim 4, wherein said supporting means comprises an ear hanger provided outside the cabinet and engaged with the upper side of the outer periphery of said cabinet.

Claim 9

The electro-acoustic transducer according to claim 4, wherein said supporting means comprises a head band.

Claim 10

The electro-acoustic transducer according to claim 8, wherein said cabinet is provided at an upper end portion of said head band and a pair of said sound guide tubes are provided at said cabinet.

Claim 11

The electro-acoustic transducer according to anyone of the preceding claims, wherein a hermetic sealing member formed of an air permeable material is provided at the sound radiating end of said sound guide tube.

Claim 12

The electro-acoustic transducer according to anyone of the preceding claims, wherein acoustic signals supplied to said transducer unit are supplied thereto by way of a compensation circuit for compensating frequency resonance peaks generated in said transducer unit.

Claim 13

A sound reproducing system comprising a sound reproducing apparatus for receiving electrical signals and transducing them into sound, and an electro-acoustic transducer including an electro-acoustic transducer unit accommodated in a cabinet, and a sound guide tube for conducting the sound from the electro-acoustic transducer unit out of said cabinet, said sound guide tube having at least the sound radiating end of a lesser diameter than the external auditory miatus to permit said sound radiating end to be introduced into the external auditory miatus, said electro-acoustic transducer being adapted for reproducing at least the low-frequency component of the frequency range of the acoustic signal of the sound reproduced by said sound reproducing apparatus.

Claim 14

A sound reproducing system comprising a sound reproducing apparatus for receiving electrical signals and transducing them into sound, and an electro-acoustic transducer including an electro-acoustic transducer unit accommodated in a cabinet, and a sound guide tube for conducting the sound from the electro-acoustic transducer unit out of said cabinet, said sound guide tube having at least the sound radiating end of a lesser diameter than the external auditory miatus to permit said sound radiating end to be introduced into the external auditory miatus, said electro-acoustic transducer being adapted for reproducing at least the low-frequency component of the frequency range of the acoustic signal of the sound reproduced by said sound reproducing apparatus.

Claim 15

The electro-acoustic transducer according to claim 12, wherein at least the low frequency component of the acoustic signals supplied to said sound reproducing apparatus is supplied to said electro-acoustic transducer.

Claim 16

The system according to claim 12, further comprising amplifier means for amplifying the low frequency component of the acoustic signal supplied to said sound reproducing apparatus.

Claim 17

The system according to claim 12, wherein said amplifier means comprises a passive network electric circuit.