(lutherie) A wooden rod located inside the body of a violin-family instrument, close to the treble-side bridge foot.

An acoustic mirror.

plural of sound mirror

(UK, informal) wholesome; reliable; in good condition

(sound, headphones) the property of blocking off outside sound through use of materials that reduce sound transmission from the exterior environment into the interior environment

Perfectly sound.

plural of sound post

(photography) A housing attached to a camera in order to reduce the shutter click sound.

simple past tense and past participle of sound out

Third-person singular simple present indicative form of sound out