Sound Waves Flashcards
What is a transverse wave?
Transverse waves vibrate perpendicular to the direction of the wave.
Longitude wave
Longitude waves vibrate parallel to the direction of wave motion.
What is the speed of sound
343m/s in non humid air
Frequency
The number of waves per second
High frequency = high pitch
Low frequency = Low pitch
Medium
A substance (solid, liquid or gas
What are the units of frequency
Hz(Herts)
Frequency range of humans
20-20000 ( humans)
Most animals have better hearing than as sea lions
How does an ultra sound work
It sends sound waves which bounces off solid structures in the body…
Why won’t sound traveling a vacuum ?
There are no particles in a vacuum.
How are echoes produced
Echoes are when sound is reflected.
Sound reflected
A flat solid wall would reflect sound
Sound absorbed
Sound is absorbed by soft materials
