Which noises can affect hearing?

Which Noises Can Affect Hearing?

1 Level of Safety	1 Decibels (Approximately)	1 Type of noise
1 Danger: Permanent hearing loss may occur	1 140 120 110 100	1 Firecrackers; rock concert Snowmobiles Chain saw Wood shop
1 Warning: Gradual hearing loss may occur over time	1 90	1 Lawnmower; motorcycle
1 Safe	1 80 60 40 20	1 Traffic noise Normal conversations Refrigerator humming Whispering

Click to See Chart

Source: National Institute on Deafness and other Communication Disorders

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