Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Statistical approach to knock detection in explosion engine Stotsky A.A. The article suggests a new statistical method for the determination of the frequency, which is the most suitable for the knock detection in explosion engine in real-time applications. The knock detectability, which is an individual cylinder attribute at a certain frequency, is verified via a statistical hypothesis test for testing the equality of two mean values, i.e. mean values of the amplitudes for knocking and non-knocking cycles. Signal-to-noise ratio is associated in this paper with the value of t-statistic. The frequency with the largest signal-to-noise ratio (the value of t-statistic) is chosen for implementation in the engine knock detection circuit.