Sound waves
- Created by: jaaaz_v
- Created on: 12-06-15 09:59
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- Sound Waves
- Longitudinal waves
- Caused by vibrating objects
- Vibrations are passed through the medium in a series of compressions
- We hear them when...
- They reach our inner ear
- When they reach the eardrum we may hear them
- Caused by vibrating particles
- The denser the medium, the faster sound travels through it
- Sound travels faster in solids than liquids
- Can't travel in space because space is a vacuum
- There are no particles
- Reflected by hard flat surfaces
- Echoes are reflected sound waves
- Delay between original sound and echoes because echoed sound waves have to travel further
- Take longer to reach your ears
- Can refract
- Change direction as they enter different medium
- When they enter denser medium they speed up
- Frequency effects pitch
- Higher the frequency, the higher the pitch and vise versa
- Frequency is the number of complete vibrations each secons
- High frequency means shorter wavelength
- Longitudinal waves
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