Quiz 9.3 Review

the number of sound waves per second; the distance between each wave

• amplitude

• frequency

• pitch

• decibels

units of frequency; one sound wave per second

• decibels

• hertz

• mach

• amplitude

range of human hearing

• less than 20 Hz

• 20 Hz - 200 Hz

• 20 Hz - 20,000 Hz

• higher than 20,000 Hz

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

• infrasound

• hyposound

• ultrasound

• hypersound

Which of these animals does NOT use infrasonic communication?

• hippos

• dogs

• giraffes

• alligators

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

• infrasound

• hyposound

• ultrasound

• hypersound

Which of these animals CANNOT hear ultrasounds?

• dolphin

• elephant

• cat

• bat

the high-ness or low-ness of a sound

• timbre

• pitch

• amplitude

• frequency

sound quality or tone

• timbre

• frequency

• pitch

• amplitude

sound that lacks clear pattern and clear pitch

• pitch

• noise

• timbre

• amplitude