acoustic

adj

The acoustic guitar produces a beautiful sound.

意味（1）

(architecture) (of building materials) Used for soundproofing or modifying sound.

意味（2）

(of a device or system) Utilizing sound energy in its operation.

意味（3）

(weaponry) (of an explosive mine or other weapon) Able to be set off by sound waves.

意味（4）

(music) Naturally producing or produced by an instrument without electrical amplification.

acoustic guitar, acoustic piano