| 摘要 |
PROBLEM TO BE SOLVED: To provide a high efficiency, low power consumption electroacoustic transducer by increasing purity of aluminum even if it is alloyed, imparting sufficient mechanical strength while sustaining lightweight, preventing disconnection at the time of winding, and employing a voice coil made of a magnet wire exhibiting high conductivity because of high purity of aluminum. SOLUTION: The voice coil of the electroacoustic transducer employs a magnet wire of such characteristics as tensile strength of 200 MPa or above, elongation of 1.0% or above, and conductivity of 58% IACS or above. The magnet wire has chemical composition of Fe: 0.2-1.0 wt%, Zr: 0.01-0.10 wt%, and the remainder of Al and inevitable impurities. COPYRIGHT: (C)2006,JPO&NCIPI
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