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US20090097694 |
ELECTRO-ACOUSTIC TRANSDUCER AND ELECTRONIC DEVICE
An electro-acoustic transducer according to the present invention comprises: a diaphragm; a casing which is formed with an opening in a part thereof for directly or indirectly supporting therein...
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US20080049967 |
Acoustic transducer
A transducer utilizes a sound-producing member positioned in the area of magnetic flux concentration between magnetic poles of opposite polarity. The sound-producing member is variably vibratable...
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US20080025552 |
Magnetic circuit for speaker device and speaker device
A magnetic circuit for a speaker device includes: a yoke which has magnetism and has a center pole formed into a column shape; and plural flat plate-shaped magnets which are uniformly arranged...
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