The present disclosure discloses an acoustic device, including: one or more shells each of which includes an accommodation cavity and an opening; one or more speakers each of which includes a vibration component placed in the accommodation cavity; one or more protection components configured to prevent a foreign body from entering the accommodation cavity through the opening, and at least a portion of one of the one or more protection components may be physically connected with the vibration component to transmit a vibration of the vibration component to the outside.