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Device for picking up bone-conducted sound in external auditory meatus and communication device using the same
| Details |
Inventors: Ono, Hiroshi;
Assignee:
Primary Examiner: Isen; Forester W.
Assistant Examiner: Le; Huyen D.
Attorney, Agent or Firm: Wegner, Cantor, Mueller & Player
A device for picking up bone-conducted sound in the external auditory meatus includes a fitting portion for accommodation in a navicular cavity formed between a tragus cartilage portion and an entrance portion of an external auditory meatus, and a bone conduction microphone unit for insertion into the external auditory meatus in such a manner as to be brought into contact with a wall of the external auditory meatus. The bone conduction microphone unit is held by the fitting portion via a resilient member in such a manner that at least a portion of the bone conduction microphone unit contacting the external auditory meatus is resiliently brought into contact with the wall of the external auditory meatus substantially orthogonally. Also disclosed is a communication device in which an earphone unit for transmitting sound from the outside is accommodated in the fitting portion of the device for picking up bone-conducted sound in the external auditory meatus, and a sound conductive tube of the earphone unit is open at a portion of the fitting portion facing the external auditory meatus. |
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DETAILED DESCRIPTION Accordingly, it is a primary object of the present invention to provide a device for picking up bone-conducted sound in the external auditory meatus, which is capable of securing a contact area and a contact pressure which are neither too large or too small with respect to the external auditory meatus without needing to insert an earpiece deeply into the external auditory meatus, and which is capable of holding a bone conduction microphone unit stably in a fitting portion.
A second object of the present invention is to provide a communication device which is provided with both an earphone unit and a microphone unit and which is capable of two-way communication and exhibits an excellent S/N ratio in a very noisy condition.
To attain the primary object of the invention, in accordance with a first aspect of the invention, there is provided a device for picking up bone-conducted sound in the external auditory meatus, comprising: a fitting portion for accommodation in a navicular cavity formed between a tragus cartilage portion and an entrance portion of an external auditory meatus; and a bone conduction microphone unit inserted into the external auditory meatus in such a manner as to be brought into contact with a wall of the external auditory meatus, wherein the bone conduction microphone unit is held by the fitting portion via a resilient member in such a manner that at least a portion of the bone conduction microphone unit contacting the external auditory meatus is resiliently brought into contact with the wall of the external auditory meatus substantially orthogonally.
To attain the second object of the invention, in accordance with a second aspect of the invention, there is provided a communication device incorporating therein the device according to the first aspect of the invention, wherein an earphone unit for transmitting sound from the outside is accommodated in the fitting portion of the device for picking up bone-conducted sound in the external auditory meatus, and a sound conductive tube of the earphone unit is open at a portion of the fitting portion facing the external auditory meatus
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