units of frequency; one sound wave per second

range of human hearing

a sound that’s too low-pitched for humans to hear

Which of these animals does NOT use infrasonic communication?

a sound that’s too high-pitched for humans to hear 

Which of these animals CANNOT hear ultrasounds?

the high-ness or low-ness of a sound

sound quality or tone

sound that lacks clear pattern and clear pitch

sound navigation and ranging; use of sound wave echos to form images or navigate

Which of these is NOT a use for sonar?

the study of sound made by wildlife

a low-frequency sound is

a high-amplitude sound is