Sound level meters, vibration sensors, vibration meters; electric apparatus and instruments being electric control devices for adjusting vehicle seats, electric control devices for vehicle seats, electric actuators for adjusting vehicle seats; apparatus for sound recording, transmission or reproduction of sound, images, or data in the field of aeronautics; active noise reduction apparatus comprising electrical filters, signal generators, loudspeakers, microphones, signal processors, and elect...

Sound level meters, vibration sensors, vibration meters; electric apparatus and instruments being electric control devices for adjusting vehicle seats, electric control devices for vehicle seats, electric actuators for adjusting vehicle seats; apparatus for sound recording, transmission or reproduction of sound, images, or data in the field of aeronautics; active noise reduction apparatus comprising electrical filters, signal generators, loudspeakers, microphones, signal processors, and elect...