To solve the problems that, though an ion cooler can be turned to a small-sized ion speaker by combining existing technologies, by the ion speaker by the method, even when sound can be generated, it is limited to emission in a single direction, a sound field capable of withstanding music appreciation can not be formed like a conventional mechanical type speaker and a sufficient volume can not be attained either.

A plurality of ion wind flow generators generating the flow of air by high voltage discharge are arranged in a circular arcuate shape on the base of a thermal conductor so as to reproduce the sound field and volume. Further, they are placed on the heat radiation surface of an acoustic signal output amplifier device.