SOUND.pdf

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