The Human hearing range is from 20Hz to 20,000Hz. Any sound above.below this limit is not heard by a human ear. Sounds above 20,000 Hz is called Ultrasonic Sound, Sound below 20Hz is referred as Infrasonic Sound. Dogs can hear upto 25,000Hz, While Bats can go much dar than this, Hope it helped you! Do leave a comment Sazz if you have any doubt.