1. Sound Notes

2. Sound is a Wave Sound is a type of ____________________ Sound is a wave that is produced by a ___________________ and travels through matter. A ___________________is a rapid, back-and-forth motion. Because the medium vibrates in the same direction as the wave travels, _____________________and ____________________.

3. How sound waves are produced. A vibrating object __________________ on the medium around it and sends out ___________________________________. Your vocal cords make sound waves.

4. The highest frequency that humans can hear is 20,000 hertz. Above 20,000 hertz the waves are called _______________

5. ________________________________ Pitch depends on the ________ of a sound wave. Pitch is the ______________________ of a sound. A low-frequency wave with a _____ wavelength = _____________. A high-frequency wave with a _____ wavelength = _____________.

6. The motion of the source of a sound affects its pitch. _____________ - the changing in perceived pitch that occurs when the source or the receiver of a sound is moving.

7. IHow the Ear Detects Sound

8. Sound waves vibrate particles The ____________ rapidly. The particles in the air in front of the drum become compressed. When the drum moves the opposite way, a space opens up between the _____________. These are the compressions and _______________ which are Longitudinal waves.

9. Sound is a ______________wave (must have a _______________) and cannot travel through a vacuum (___________________). Sound travels faster through __________ than in gases or ________.

10. Intensity Determines Loudness Intensity of a sound is the ________________ the sound wave has. A ___________ is the unit used to measure sound intensity.

11. ________________ is the increasing of the strength of an electrical signal and is used to increase the intensity of a sound wave. Intense sound can damage hearing.

12. Transverse Wave w/ High Amplitude

13. Transverse Wave with a Long Wavelength

14. Transverse Wave w/ a low frequency.

15. Transverse wave w/ little energy.

17. Transverse wave w/ a high pitch.

18. Longitudinal wave w/ high frequency

19. Longitudinal wave w/ high amplitude.