Apparatus for vibration measurement, monitoring and diagnosis namely, vibration meters, electro-technical vibration meters, sound and vibration analyzers, acoustic analyzers, electro-acoustic analyzers, structural dynamics analyzers, data acquisition amplifiers, conditioning amplifiers, hand-held vibration analyzers, sound level meters, noise dose meters, noise monitoring terminals, acoustic transducers, microphones, hydrophones, vibration transducers, accelerometers, calibration systems for ...