Chapter #12 - Sound Flashcards
What makes sounds?
- Something vibrates
- Causes the air around it to vibrate
- Vibrations pass through air into our ears and cause eardrums to vibrate and we hear sound.
What type of wave is a sound wave?
A longitudinal wave
What does a sound wave consist of?
- Compression
- Rarefraction
What is the defenition of compresion?
A reagion of a sound wave wear the particles pushed together.
What is the defenition of rarefraction?
A region of a sound wave where particles are further apart.
What an essential factor that causes sound to travel?
A medium
Why can no sound be heard in a vacuum?
Becasue there are no particles presesnt to pass on the vibrations caused by the sound wave.
How fast does sound generally travel in air?
between 330 m/s - 350 m/s
How fast does sound generally travel in liquids?
1500 m/s
What factors cause the speed of sound to varey?
- Temperature
- Humidity
What is the trangle for speed?
What can help you see sound and how does it work?
What: A cathode ray oscilloscope and michrophone can be used to repersent sounds on a dispaly screen.
How: Michroscope picks up sound and converts it to an electrical signal, oscilloscope converts this to a line which represents the vibrations that make up the sound wave.
What is amplitude?
**
What does amplitude do to sound?
makes it louder or quieter
What is frequency?
