acoustical

adj. pertaining to sound; pertaining to hearing; reducing noise

Acoustics is the branch of physics concerned with the study of sound (mechanical waves in gases, liquids, and solids). A scientist who works in the field of acoustics is an acoustician. The application of acoustics in technology is called acoustical engineering. There is often much overlap and interaction between the interests of acousticians and acoustical engineers.
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Adjective
1. of or relating to the science of acoustics; "acoustic properties of a hall"
(synonym) acoustic
(pertainym) acoustics

(a.)
Of or pertaining to acoustics.
  

Synonyms and related words:
acoustic, audible, audile, audio, auditory, aural, auricular, hearing, hypersonic, otic, otological, otopathic, otoscopic, phonic, sonic, subsonic, supersonic, transonic, transsonic, ultrasonic,