METHODS AND SYSTEMS TO CHARACTERIZE NOISES SENSED BY A KNOCK SENSOR

A method of characterizing a noise signal includes receiving (90) a noise signal sensed by a knock sensor coupled to a reciprocating device, preconditioning (92) the noise signal to derive a preconditioned noise signal, applying (94) an ADSR envelope to the preconditioned noise signal, extracting (96) tonal information from the preconditioned noise signal, and creating (98) a fingerprint of the noise signal based on the ADSR envelope, the tonal information, or a combination thereof.