noise roomnoise room (noise room) is to simulate the free field space indoors, so the sound absorption coefficient of each surface in the room is required to be above 99%. 
no sound roomno sound room
semi-anechoic roomsemi-anechoic room
listening roomlistening room
air sound insulation room
full anechoic chamber (full silence chamber)precision full silence chamber 
sound insulation boxsound insulation box
anechoic chamber(anechoic room )anechoic chamber(anechoic room )
nvh semi-anechoic chambernvh semi-anechoic chamber
acoustic laboratoryacoustic laboratory (soundproof room)
