ELECTROACOUSTIC CONVERSION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an electroacoustic conversion device which is thin and capable of easily obtaining large output.SOLUTION: The electroacoustic conversion device includes: an air chamber 100 whose inside is sealed and which is formed in a thin box shape; a first piezoelectric sounding element 310 closing a first fitting hole 111 that is formed on a first principal surface of the air chamber 100; a second piezoelectric sounding element 320 closing a second fitting hole 122 that is formed on a second principal surface of the air chamber 100 and at a position opposite to the first fitting hole 111; a first sound guide member 210 with which a first sound guide path is formed for guiding a sound generated by the first piezoelectric sounding element 310 in a side direction of the air chamber 100; and a second sound guide member 220 with which a second sound guide path is formed for guiding a sound generated by the second piezoelectric sounding element 320 in the same direction as the first sound guide path. Sound signals are inputted to the first piezoelectric sounding element 310 and the second piezoelectric sounding element 320 in such a manner that generated sounds guided in the side direction become the same phase.SELECTED DRAWING: Figure 2