Certain moths have very sensitive hearing equipment that allows them to detect ultrasonic sounds, which can help them evade predators like bats that use ultrasound for echolocation.
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Frequencies higher than 20 kHz are called ultrasonic sound or ultrasound. Animals such as dolphins, bats, and porpoises produce these sounds.
Some animals might detect earthquakes before humans because earthquakes produce low-frequency infrasound before the main shock waves, which can possibly alert the animals.
Rhinoceroses communicate using infrasound with frequencies as low as 5 Hz. Whales and elephants also produce sounds in the infrasound range.
Sound bounces off solid or liquid surfaces, much like a rubber ball bouncing off a wall. This phenomenon is known as reflection of sound.