1. Method for detecting ticks on a device with which an audio signal is received in a noisy environment, from the audio signal which includes a stream of audio samples (y(n), (y′(n)), the method comprising the steps of: applying the audio signal to a coarse tick detection processor arranged to decide whether the audio signal likely includes a tick; and only if the course tick processor decides that the audio signal likely includes a tick, enabling a fine tick detection processor to decide, by more thorough processing of said audio signal, whether the audio signal represents a tick on the device, wherein the fine tick detection is performed using a comparison with a previously trained set of reference properties that are characteristic for the device with which the audio signal is received.