| 摘要 |
This acoustic device can suppress a loss in sense of volume and sense of comfort. The acoustic device includes a vibration unit (10) including a piezoelectric element (101) that flexes and a panel (102) that vibrates by being bent directly by the piezoelectric element (101). The panel (102) includes a concavity (104), and the concavity (104) is contacted to a user's ear, causing the user to hear sound. |
