LOUDSPEAKER-PURPOSE VIBRATION PLATE, LOUDSPEAKER USING THAT VIBRATION PLATE, ELECTRONIC DEVICE, AND MOBILE APPARATUS

摘要

A loudspeaker-purpose vibration plate comprises: a base material layer including natural fiber; and a coating layer constituted by cellulose nanofiber. The coating layer is formed on at least one surface of the base material layer. The elastic modulus of the cellulose nanofiber is larger than the elastic modulus of the base material layer, and further, the internal loss of the cellulose nanofiber is smaller than the internal loss of the base material layer.