Sound Energy

4. is a reflection of sound.
5. is vibrations that travel through the air or another medium and can be heard when they reach a person’s or animal's ear.
6. move back and forth.
8. is how high or low the sound is; determined by the frequency of the vibration.
9. is a pattern of the movement of energy traveling through a medium (such as air, water, or any other liquid or solid matter) as it travels away from the source of the sound.
11. A thin, tightly stretched piece of tissue in the ear that vibrates when sound waves hit it, is called the __________ .

1. is to send (information such as sound) in the form of electrical signals.
2. is the number of times that something (such as a sound wave) is repeated in a period of time (such as a second) measured in hertz.
3. are two pieces of tissue located in the larynx (throat) that vibrate when air passes over them, producing the sound waves associated with talking and singing.
6. is how much sound energy reaches the ear.
7. a sound is to make something, such as a musical instrument louder by increasing the strength of electric signals.
10. is the measure of a sound wave.