hearing table

Environmental Noise
Weakest sound heard 0dB
Normal conversation (3-5′) 60-70dB
City Traffic (inside car) 85dB
Train whistle at 500′ 90dB
Subway train at 200′ 95dB
Level at which sustained exposure may result in hearing loss 90 – 95dB
Power mower 107dB
Power saw 110dB
Pain begins 125dB
Pneumatic riveter at 4′ 125dB
Jet engine at 100′ 140dB
Death of hearing tissue 180dB
Loudest sound possible 194dB

OSHA Daily Permissible Noise Level Exposure
Hours per day Sound level
8h 90dB
6h 92dB
4h 95dB
3h 97dB
2h 100dB
1.5h 102dB
1h 105dB .5h 110dB .25h 115dB

Perceptions of Increases in Decibel Level
Imperceptible Change 1dB
Barely Perceptible Change 3dB
Clearly Noticeable Change 5dB
About Twice as Loud 10dB
About Four Times as Loud 20dB

Sound Levels of Music
Normal piano practice 60 -70dB
Fortissimo Singer, 3′ 70dB
Chamber music, small auditorium 75 – 85dB
Piano Fortissimo 84 – 103dB
Violin 82 – 92dB
Cello 85 -111dB
Oboe 95-112dB
Flute 92 -103dB
Piccolo 90 -106dB
Clarinet 85 – 114dB
French horn 90 – 106dB
Trombone 85 – 114dB
Tympani & bass drum 106dB
Walkman on 5/10 94dB
Symphonic music peak 120 – 137dB
Amplifier rock, 4-6′ 120dB
Rock music peak 150dB

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