Claims
- 1. An electro-acoustic apparatus, 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 having a smaller diameter than an external acoustic meatus to allow at least a sound radiating end of the sound guide tube to be inserted into the external acoustic meatus; said electro-acoustic apparatus further comprising supporting means for supporting one of said transducer or said sound guide tube so that the sound radiating end of said sound guide tube is at a predetermined position within the external acoustic meatus; wherein said cabinet is formed for enclosing the rear side of said electro-acoustic transducer unit and not a sound radiating side of said electro-acoustic transducer, said sound guide tube being L-shaped and having an end opposite to said sound radiating end connected to a sound conducting opening provided on a lateral side of said cabinet.
- 2. The electro-acoustic transducer according to claim 1 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.
- 3. The electro-acoustic transducer according to claim 1 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.
- 4. The electro-acoustic transducer according to claim 1 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.
- 5. The electro-acoustic transducer according to claim 1 wherein said supporting means comprises a head band.
- 6. The electro-acoustic transducer according to claim 5 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.
- 7. The electro-acoustic transducer according to claim 1 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.
- 8. A sound reproducing system, comprising:a sound reproducing apparatus supplied with acoustic signals; and an electro-acoustic transducer unit including an electro-acoustic transducer accommodated in a cabinet, and a sound guide tube for conducting the sound from the electro-acoustic transducer out of said cabinet; said sound guide tube having at least a sound radiating end with a smaller diameter than an external auditory meatus to permit said sound radiating end to be inserted into the external auditory meatus and to define a space between said sound radiating end of said sound guide tube and said external auditory meatus, said space for allowing surrounding noises to enter the external auditory meatus and be heard by a user; said electro-acoustic transducer reproducing at least a low-frequency component of a frequency range of the acoustic signals of the sound reproduced by said sound reproducing apparatus.
- 9. The sound reproducing system according to claim 8, further comprising means for supplying only said low frequency component of the acoustic signals to said electro-acoustic transducer.
- 10. The system according to claim 6 further comprising amplifier means for amplifying the low frequency component of the acoustic signal supplied to said sound reproducing apparatus.
- 11. The system according to claim 8 wherein said amplifier means comprises a passive network electric circuit.
- 12. An electro-acoustic apparatus comprising:an electro-acoustic transducer for receiving electrical signals and for generating acoustic signals; a cabinet for enclosing a rear side of said electro-acoustic transducer and wherein a sound radiating side of said electro-acoustic transducer is not enclosed by said cabinet; a sound guide tube connected to said cabinet and having a sound radiating end inserted into an external acoustic meatus of a user for conducting more of a low frequency component than higher frequency components of said acoustic signals to said external acoustic meatus; wherein an inside diameter of said external acoustic meatus is greater than an outside diameter of said sound radiating end thereby defining a space between said external acoustic meatus and said outside diameter of said sound guide tube for allowing surrounding noises to enter said space and be heard by said user whereby said external acoustic meatus is not completely obstructed by said electro-acoustic apparatus.
- 13. The electro-acoustic apparatus according to claim 12, wherein said acoustic signals generated by said electro-acoustic transducer are at least contained within a certain bandwidth and secondary acoustic signals received in said external acoustic meatus have a bandwidth which is at least partially outside of said certain bandwidth.
- 14. The electro-acoustic apparatus according to claim 13, wherein said secondary acoustic signals are generated by at least a second electro-acoustic transducer located remote from said electro-acoustic transducer.
- 15. The electro-acoustic apparatus according to claim 13, wherein said secondary acoustic signals are generated by at least a second electro-acoustic transducer attached to an ear of said user, said second electro-acoustic transducer having a sound radiating side which directs said external acoustic signals into said external acoustic meatus.
- 16. The electro-acoustic apparatus according to claim 12, wherein said sound guide tube is divided into a plurality of tubes with each one of said plurality of tubes defining a separate passage from said electro-acoustic transducer to said external auditory meatus.
- 17. An electro-acoustic apparatus, comprising:an electro-acoustic transducer having a sound radiating side and a rear side opposite said sound radiating side, said electro-acoustic transducer for converting electrical signals into acoustic signals; a cabinet for enclosing said rear side of said electro-acoustic transducer but not said sound radiating side; a sound guide tube having one end connected to said cabinet and another end for insertion within an external acoustic meatus of a user; wherein an inside diameter of said sound guide tube is sized so that more of a low frequency component of said acoustic signals is conducted in said sound guide tube than higher frequency components of said acoustic signals.
- 18. The electro-acoustic apparatus as set forth in claim 17, wherein an outside diameter of said sound guide tube is smaller than an inside diameter of said external acoustic meatus and said sound guide tube is spaced from said external acoustic meatus to allow the passage of acoustic signals from a secondary source through said external acoustic meatus.
- 19. The electro-acoustic apparatus as set forth in claim 17, further comprising filtering means for filtering out said higher frequency components and wherein said sound guide tube conducts only said low frequency component.
- 20. An electro-acoustic apparatus, comprising:an electro-acoustic transducer having a sound radiating side and a rear side opposite said sound radiating side, said electro-acoustic transducer for converting electrical signals into acoustic signals; a cabinet for enclosing said rear side of said electro-acoustic transducer but not said sound radiating side; a sound guide tube having one end connected to said cabinet and another end for insertion within an external acoustic meatus of a user; wherein an outside diameter of said sound guide tube is smaller than an inside diameter of said external acoustic meatus and said another end of said sound guide tube is spaced from said external acoustic meatus to allow the passage of acoustic signals from a secondary source through said external acoustic meatus.
- 21. The electro-acoustic apparatus as set forth in claim 20, wherein an inside diameter of said sound guide tube is sized so that more of a low frequency component of said acoustic signals is conducted in said sound guide tube than higher frequency components of said acoustic signals.
- 22. The electro-acoustic apparatus as set forth in claim 21, further comprising means for filtering out said higher frequency components and wherein said sound guide tube conducts only said low frequency.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-255797 |
Sep 1989 |
JP |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/588,030 filed Sep. 24, 1990 now abandoned.
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Entry |
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Continuations (1)
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Number |
Date |
Country |
Parent |
07/588030 |
Sep 1990 |
US |
Child |
08/320935 |
|
US |