| regular pulse emission in some megachiropteran bats. | we recorded vocalizations of megachiropteran bats, cynopterus brachyotis, c. horsfieldi, megaerops ecaudatus and macroglossus sobrinus as they were held in our hands, in a hanging position or moved up and down, simulating flight. all four species produced regular audible tone pulses with a frequency spectrum of less than 9 khz (peak at 4-6 khz). the duration of a single pulse varied from 14.9 to 23.6 msec on average among these species. the interpulse interval was between 108.3 and 127.7 msec. i ... | 1995 | 8528020 |