Physical science, acoustic and optical apparatus, signaling, measuring and surveillance apparatus, apparatus for photographs, films, films and sound and radio broadcasting, loudspeakers, talking machines, electroacoustic and cinematographic apparatus; spare parts, individual parts for all the aforesaid goods; electrical apparatus for wireless transmission of acoustic signals; microphones, wireless microphones, broadcast and reception apparatus for wireless microphones, headstrap earphones, wireless headstrap earphones, broadcasting stations for wireless headstrap earphones, hands-free headsets comprising earphones and a microphone; amplifiers, apparatus for acoustic recording, for recording, for transmission and for reproduction, reverberation devices, apparatus used for delaying broadcast after recording, infrared, broadcasting, transmitting and receiving apparatus and installations; ultrasound converters and electroacoustic apparatus containing ultrasound converters, apparatus for recording studios, vibration meters, acoustic tracking apparatus, telemeters, goniometers, measuring apparatus as well as clip-on measuring devices for acoustic testing, audio frequency repeaters, stereo sound systems, projection apparatus and screens, stereo apparatus and color cinematographic apparatus, including their parts, audio parts (individual parts for microphones, earphones, loudspeakers and also apparatus for recording studios); voice controls

Medical acoustic apparatus, very high precision apparatus for medical use