ELECTROACOUSTIC TRANSDUCER AND DIAPHRAGM

PROBLEM TO BE SOLVED: To obtain the natural timbre intrinsic to natural wood and high appearance quality, and to achieve flat characteristics suppressing a sound pressure dip from the midrange to the treble ranges. SOLUTION: An electroacoustic transducer includes a magnetic circuit 9; a frame 13 enclosing the magnetic circuit 9; and a diaphragm including a center vibrating portion 19 of which the cross section is approximately dome-shaped and an outer circumferential vibrating portion 21 which is formed along the full outer circumference of the center vibrating portion 19 and of which the cross section is approximately dome-shaped, the diaphragm comprising: a first plate thickness area D including an entirety of the center vibrating portion 19, having a double-layer structure of a wood sheet 23 made of natural wood, a paper sheet 24 and a synthetic resin film 25; and a second plate thickness area D-1 including an edge portion 21b of the outer circumferential vibrating portion 21, having a plate thickness thinner than a thickness of the first plate thickness area D, and having a single-layer structure of the synthetic resin film 25. COPYRIGHT: (C)2009,JPO&INPIT