The photograph of experimental setup for measuring the auditory thresholds in noctuid moths during tethered flight. Flying moth is glued to a leash of mechano-optical sensor of horizontal shift. The current position of a moth's wing is detected by means of optical emitter and detector (which are shown in the lower part of the photo). The loudspeaker for acoustic stimulation is situated on one side of the moth, the LED stroboscope is placed above the moth.