Acceleration Sensor for speaker cabinets and related components
Use this handy tool along with the ATB test set to measure vibrations of cabinets, terminal plates, and most anything that will rattle or buzz.
The acceleration sensor is used to measure vibrations on speaker cabinets, car body or machine parts. An acceleration measures the actual substance vibrations only and not the air sound waves. During the measurement, the vibrations are transmitted to the sensor casing. In the casing, there is an electret foil, whose mass works against that of the casing. Thus creating a voltage that relates to the casing vibration.
The sensors are not gauged, the shown amplitudes are not defined values. The measurable frequency range is 30Hz – 3KHz. The sensor shows the frequency of the vibration and by comparing you can suppress the vibrations by choice.
The sensor is fixed to the measurement object with two-sided sticky tape.
The sensor is connected to the microphone input of the soundcard. Here the sensitivity has to be increased by turning on the Mic- boost or microphone amplifier in the system control.