Activity 3: Complete Me!
Directions: Complete the statements by choosing the correct answer from the word box provided.
Word Box
pitch
infrasonic
ultrasonic
decibel
loudness
intensity

1. _____________________is known as the highness or lowness of sound.
2. Vibrational frequencies beyond 20 000 Hz is called _______________________ frequencies.
3. Extremely low frequencies are known as _______________________ frequencies.
4. The amplitude of a sound wave determines its _____________________ or volume.
5. The unit of intensity level for sound is the _______________________ which is named after Alexander Graham Bell.​