English: Illustrations of sounds used during Motion Classification. Binaural recording of click and click echoes made in LB's ears in the anechoic chamber, while he moved his head in a sweeping motion from left to right and made clicks in the presence of a concave surface located 40 cm and 20° to the left of straight ahead. In th e experiment sounds were presented via MR compatible headphones (Sensimetrics, Malden, MA, USA, Model S-14). To illustrate the sounds that participants heard through these headphones during the experiments, sample sounds have been passed through a 10 kHz low-pass filter. NOTE: We advise to use in-ear stereo headphones to listen to sound sample.