Sound = Waves Disturbing Air Molecules
Molecules bunched together
- compressed
Molecules farther apart – lower
pressure
For sound waves, frequency = pitch
Things start to add up
Constructive Interference
Destructive Interference
“Locked-in” waves amplifyCompeting waves cancel each other
fundamental
•Harmonics
Pure tone: A4 440 HzClip 2
Vibrating string tone: A4 440 HzClip 3
Harmonic Frequency (Hz)
Fundamental 220
1st 440
2nd 660
3rd 880
4th 1100
5th 1320
This is why there are a lot of octaves in Barbershop arrangements
Harmonic Number
Singer #1 Frequency (Hz)
Singer #2 Frequency (Hz)
Fundamental 220 440
1st 440 880
2nd 660 1320
3rd 880 1760
4th 1100 2200
5th 1320 2640
Look at all those octave intervals and ear candy possibilities
Part Note Fundamental1st
Harmonic2nd
Harmonic
BASS A 440 880 1320
LEAD E 660 1320 1980
Watch Clip #4
Lots of anatomy
and mechanics
involved
Wave Form Harmonics
Tongue, lips, soft palate position alter the resonance cavity.
This alters theresonators which filters out oramplifies certainfrequencies.
Hard work but awesome fun when we get it together.