| 摘要 |
PROBLEM TO BE SOLVED: To suppress production of a peak and a dip at a specific frequency by reducing the unbalance of a vibration mode that is propagated from a voice coil to a non-circular diaphragm. SOLUTION: This dynamic electroacoustic transducer is provided with non- circular diaphragms 7, 7A. Voice coils 6, 6A driving the diaphragms 7, 7A have a shape nearly close to a shape of the diaphragms, and the length of perpendicular lines a, b dropped from a flat shape of an outer circumference of the diaphragms to a voice coil connection 6a is constant over the entire circumference. Thus, unbalance in a vibration mode hardly takes place.
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