NOISE

Noise Levels

100

PEL

What is Permissible Exposure Level

200

Units of sound pressure

What is decibles

300

Interprets sound

What is the brain

400

140 dBA

What is the threshold of pain

500

Maximum level of exposure for 15 min

What is 115 dBA

Occupational Regulation

100

Government organization responsible for regulating noise levels

What is OSHA

200

(PEL) for an 8 hr work day

What is 90 dBA

300

30 million people in the United States

What is the number of people exposed to high noise levels

400

85 dBA

What is the Action Level

Misc

100

Tinnitus

What is ringing of the ear

200

External Ear Canal

What is the path that sound travels through in the ear

300

Vibrations traveling through the air

What is sound

400

Old age hearing loss

What is Presbycusis

500

Octave Band Analyzer

What is measurement of noise levels at different frequencies