Frequency Range of Hearing for Humans and Selected Animals

low high 

Humans 20 20,000 

Cats 100 32,000 

Dogs 40 46,000 

Horses 31 40,000 

Elephants 16 12,000 

Cattle 16 40,000 

Bats 1,000 150,000 

Grasshoppers and locusts 100 50,000 

Rodents 1,000 100,000 

Whales and dolphins 70 150,000 

Seals and sea lions 200 55,000 

Sonar is a system in which objects are detected by sound waves. These waves are very high in frequency and are called ultrasonic. Ultrasound waves have frequencies above 20 kHz. Few animals can hear ultrasonic waves. Some of the animals that can hear them are dogs, cats, porpoises, rodents, whales, dolphins, seals, sea lions and bats.
Bats rely heavily on ultrasonic waves for echolocation. They use echolocation to navigate while flying and to track down prey. Bats will also sneak up on some of its prey by using echolocation. Bats usually live in dark areas or in caves. To help navigate they rely on sonar. They send out ultrasonic waves with very high frequencies. When the waves return to them that are able to map out the location they are in. A bat's sonar is so advanced that it allows then to fly in complete darkness, swoop down and snatch insects without warning and hover right above water level to get a drink.