SAL SOUND ACOUSTICS LABORATORY

HIGH FIDELITY AND STEREOPHONIC COMPONENTS-NAMELY, MUSIC AND SOUND SYSTEMS COMPRISING AMPLIFIERS, MICROPHONES, BAFFLES, REPRODUCERS, SOUND COLUMNS FOR RESTRICTION OF SOUND PROJECTION, LOUD SPEAKERS, INTERCOM AND TELEPHONE SYSTEMS, TRANSCRIPTION TURNTABLES AS COMPONENT PARTS THEREOF; COMMERCIAL SOUND EQUIPMENT COMPRISING MUSIC SYSTEMS FOR PUBLIC AND SCHOOL AUDITORIUMS, PUBLIC ADDRESS SYSTEMS; INTERNAL COMMUNICATION SYSTEMS INCLUDING RECORDERS, MICROPHONES AND SPEAKERS AS COMPONENT PARTS THEREOF; AND TAPE RECORDERS AND COMPONENT PARTS THEREFOR