13.1 LOUDNESS AND AMPLITUDE Flashcards
What is sound and how is it made?
Sound is a type of energy made by vibrations. The vibrations create sound waves.
What are sound waves?
When an object vibrates, it causes movement in the particles of the medium. This movement is called sound waves, and it keeps going until the particles run out of energy
What ways can waves be described?
- Amplitude
- Wavelength
- Number of waves per second
What is amplitude?
Distance from the center of the wave to the highest (crest) or lowest (trough) point
What are wavelengths?
Distance from one point on the wave to the same point on the next wave.
Ex. trough to trough, crest to crest
How many waves are produced per second?
1
Does compression have higher or lower pressure
Higher
Does rarefaction have higher or lower pressure
Lower
RAREFACTION IS SPELLED WITHOUT AN R
NOT rarefRaction
When an amplitude is large, what happens to the sound?
It becomes louder
When an amplitude is small, what happens to the sound?
It becomes softer
Will sound waves get stronger or weaker as they travel? Why?
Weaker. When sounds travel, they will spread out from the source. Energy is transferred to the medium that sound is travelling through. Energy in the medium is dissipated
When a sound is amplified, the amplitude is increased/decreased
increased
