Packed inside the Mavic's tiny body are 24 processing cores, GPS and GLONAS sensors, five cameras, two ultrasonic range finders and some redundant sensors thrown in to be extra safe. (cultofmac.com)
Cats also have better hearing than most other carnivores, including an ability to hear in the ultrasonic range to better track prey. (sciencedaily.com)
The recordings showed that the sounds were quite remarkable, having a high degree of complexity and being produced at high frequency, including components in the ultrasonic range that humans can't hear. (sciencedaily.com)