Interactions of Sound Waves:
1. Describe how sound waves interfere with each other.
2. Describe beats.
Remember that sound is the result of the interpretation of a longitudinal wave. Like any wave, sound waves interfere with each other when they come in contact with each other.
Reverberation is the
combining of reflected sounds waves.
Destructive interference :
Waves are out of phase
The result is the difference of the amplitudes an intensity is decreased
Dead Zones are where destructive interference results in no sound
These do not usually happen because most speakers put out many frequencies
Is pleasing to the ear
A definite identifiable pitch
A definite repeatable rhythm
Beats occur when the compressions of different frequencies line up together
The resulting beat is the difference of the two frequencies (higher - lower)
Is an unwanted sound
No pleasing qualities
No identifiable pitch
No definite repeatable rhythm
When noise reaches a level that causes
pain or damage it is noise pollution.