Testing apparatus and software for determining the quality in communication devices

Amplifiers; Megaphones; Subwoofers; Amplifier stands; Battery chargers for use with mobile phones; Bone conduction earphones; Earphones and headphones; Electric effects units for musical instruments; Electronic sound pickups for guitars and basses; Loudspeakers, headphones, microphones and CD players; Multimedia projectors; Musical instrument amplifiers; Smartphone mounts; Soundbar speakers; Wireless headphones