9 Apparatus for recording, transmission, reproduction or processing of sound or images; active noise reduction apparatus comprised of electrical filters, signal generators, loudspeakers, microphones, signal processors, and electric circuits, namely, update modification circuits, fast fourier transform circuits, arithmetic circuits and inverse fast fourier transform circuits, an electrical connection housing, a power source, electromagnets, vibration sensors, accelerometers, proximity sensors and electric actuators, digital active noise reduction electric circuitry, and adaptive filters for selective audio signal suppression, headphones, headset; passive noise reduction apparatus, namely headphones, headsets; frequency indicators, frequency stabilizers, apparatus for frequency modulation, namely frequency converters and electronic frequency inverters; apparatus and equipment for entertainment and electronic communications and boarded electronics for aircrafts comprising of computer hardware and downloadable, recorded software for the transmission of data via cables and/or wirelessly, video consoles and adapters for electronic devices; all the aforementioned goods intended for the aeronautical field; microprocessors and downloadable, recorded software for individual and centralized management and maintenance of aircraft seats; electric apparatus and instruments, computer hardware, downloadable, recorded software and electric control devices for use in organizing aircraft vehicle seats; electrical organizers, namely hardware and downloadable, recorded software for use in data management regarding aircraft vehicle seats; electric actuators for the aircraft vehicle seat adjustment system