soundproofed
sound-proofed
adjective
Made impervious to sound, preventing noise from entering or escaping a space.
"The soundproofed room blocked all external noise."
Thesaurus
Synonyms: soundproof, impervious, imperviable
sound-proofed
Made impervious to sound, preventing noise from entering or escaping a space.
"The soundproofed room blocked all external noise."
Synonyms: soundproof, impervious, imperviable