Vehicle-related event detection using signal processing

A method of detecting an event related to vehicle integrity, the method comprising:

• providing a microphone inside a vehicle;
• using said microphone, continuously generating an analog audio signal;
• providing an analog signal processor also inside said vehicle, associated to said microphone;
• using said analog signal processor,
• computing a time-frequency spectrogram of said analog audio signal, wherein said computing comprises dividing said analog audio signal into a plurality of time segments, and decomposing said time segments of the analog audio signal into a plurality of signal components in predetermined frequency bands;
• wherein said dividing the analog audio signal into a plurality of time segments is performed in parallel on the same audio signal according to at least two temporal windows having different durations;
• and,
• using said analog signal processor, evaluating said time-frequency spectrogram to detect said vehicle integrity-related event,
• whereby at least the computing and evaluating are fully carried out in the analog domain, and without digital signal processing.