Chassis Ear Squeak and Rattle Finder-multi mic stethoscope is a multi-microphone sensor output listening device which leads to a single switch. That allows the technician to switch between the sensors and while listening with headphones to an operating car determine where the noise is coming from
A far more advanced device that measures noise and vibrations is Vetronix Noise Vibration Analyzer. It enables to diagnose in which mechanical component (engine, transmission, differentials, wheels) the particular knock, excessive noise or misbalance is located. It brings information from Vehicle Control Module while comparing it to the real time information coming from noise and vibration sensors that are connected to the analyzer.