Abstract
The most common device used for detonation detection is a piezoelectric transducer. Vibrations from the engine cause the seismic mass to compress the crystal and therefore produce a voltage signal proportional to the changing force. The sensor will detect all engine vibrations, so after amplification, the signal is filtered to remove all the unwanted frequencies, leaving only those that are produced by detonation or knocking.
Keywords: tuning, strategy, simplification, knocking, automotive