SELF-RESONATING SOUND EMITTING SPEAKER AND METHOD FOR INSTALLING SELF-RESONATING SOUND EMITTING SPEAKER

摘要

The invention provides a self resonance-type sound-producing speaker that is waterproof and is readily attachable. The self resonance-type sound-producing speaker 1 includes an actuator speaker unit 2 and a polymer foam 3 arranged to cover the entire outer surface of this speaker unit 2 and converts the vibrations from the speaker unit 2 into plane waves to externally produce sound. The polymer foam 3 preferably has the expansion ratio of 10 to 30 times and the closed pore structure. The thickness of the polymer foam 3 is preferably not less than 2 mm and is more preferably not less than 3 mm.