Patent ID: 9578406
Date: 2017-02-21
CPC Classifications: H04R

Claim:
1. An acoustic device, comprising: a holder that has one end abutting inside of an inferior antihelix crus and other end abutting a depression between a tragus and an antitragus of a user's ear; and a vibrator that is held by the holder and, based on an audio signal, expands and contracts in a direction intersecting a direction of connecting the one end and the other end, and by the expansion and the contraction, causes the ear to vibrate, wherein the vibrator comprises a first piezoelectric element and a second piezoelectric element, wherein a rigid body is provided between the first and second piezoelectric elements, wherein the rigid body has a bent shape, and wherein the rigid body is configured so that the first piezoelectric element and the second piezoelectric element expand in opposite directions at the same time.