Sound Flashcards
What produces sound?
Vibrations
What happens when the vibrations increase in frequency?
The pitch increases.
What unit of measure is used to measure pitch?
Hz
What happens when the vibrations are larger?
The volume increases
What unit of measure is used to measure volume (amplitude)?
Decibles
What is the formula for the frequency of sound?
number of waves to pass a point
__________________________________
time in seconds
What is amplitude?
The amplitude of a wave is its maximum disturbance from its undisturbed position.
How does sound travel?
When a source makes a sound it vibrates the particles back and forth creating sound waves.
How do the particles move?
The particles vibrate in fixed positions, but the energy transfers.
What are these sound waves called?
Longitudinal waves.
Why does sound travel faster through solids?
The particles are closer together (denser), which lets the particles collide with its neighboring particles easier.
(The energy is tranfered faster)
What is the audible range of humans?
The audibles range of humans is from 20 Hz to 20, 000 Hz
How do we hear with our ears?
•The sound waves are collected by the ear lobe
•The waves travel along the ear canal
•The waves reach the ear drum and make it vibrate.
•The small bones (ossicles) amplify the vibrations
•The cochlea turns these into electrical signals.
•The auditory nerve takes these signals to the brain.
