SOUND.pdf
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SOUND
An audio engineering guide
AMPLITUDE in dB
•
Associated with the height of sound wave and
is related to volume
•
Typical conversation 60-75 dB
•
90dB regular exposure such as factory noise –
can cause hearing damage
•
120 – threshold of pain
FREQUENCY Hz
•
The amount of cycles per second (Heinrich
Hertz, German physicist)
•
Average human hearing is between 20 to
20,000 Hz( 20kHz)
•
20-200 Hz Bigger but destructive
•
To5kHz“Inyourface”
•
5-20 kHz airy, bright or thinner ( a must be for
close sounds)
PHASE
•
Designates a point in a sound wave`s cycle and
is related to frequency.
•
Tips to check phase:
•
Mono button
•
Phase flip
•
Phase meter
VELOCITY
•
Speed at which sound travels
•
11.30 ft per sec at 6 degrees Fahrenheit ( 344
m/s at 20 oC
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