plural of sound post

(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 engineer

(informal, phonetics) Synonym of dental fricative

plural of sound stage

(informal, phonetics) A voiceless postalveolar fricative.

plural of sounding rod

plural of sounding balloon