Male countdown from 5 to 1 with alternate finishings go, start, stop and rest. It is not the clearest quality but the best i could do at home. . . I used it for circular/tabata timer but you can use it as you wish. Recorded and edited in audacity.
3 cell quantussy patch. One cell acts as "controller cell". When the controller cell starts a new cycle a noise is heard defining the start of one cycle and at the same time the ending of the previous. Here we have three short cycle.
Stereo contact mics clipped to directly to the exhaust pipe of a honda crf250m motorcycle whilst the engine is started, revved and then stopped. Tascam dr-22wl, custom stereo contact mics. 20-05-10_102646_dr-22wl_crf250m_exhaust_contact. Wav.