a rotary vane compressor having features for reducing sound emitted from the compressor during operation . the sound reduction features include and relate to specific components of the compressor . specifically the features relate to the compressor motor ; a non - vented motor housing and back or closure ; the inlet ring ; the bearing system ; the rotor and vane positioning and vane weight or mass ; the mass of the body within which the rotor and vane rotate ; and a shroud which surrounds the body which is solid and non - vented solid and may be formed of a laminated material having a sound dampening core layer .