Sound intensity levels
Decibel Level (dB) Source
140 threshold of pain: gunshot, siren at 100 feet
135 jet take off, amplified music
120 chain saw, jack hammer, snowmobile
100 tractor, farm equipment, power saw
90 OSHA limit - hearing damage if excessive exposure to noise levels above 90 dB
85 inside acoustically insulated tractor cab
75 average radio, vacuum cleaner
60 normal conversation
45 rustling leaves, soft music
30 whisper
15 threshold of hearing
0 acute threshold of hearing - weakest sound
Permissible noise exposure scale
Duration - hours per day Sound level (dBA)
8 hours - 90 dB
4 hours - 95 dB
2 hours - 100 dB
1 hour - 105 dB
1/2 hour - 110 dB
1/4 hour or less - 115 dB
Source: OSHA Noise Standard
Terms of Usage: This publication is compiled from various reference sources and is designed to provide current and basic non-authoritative information on the subject matter covered. It is provided with the understanding that the publishers are not engaged in rendering medical, legal, financial, consulting, accounting or other professional service. Since all of the material has been condensed for mobile usage, the information should be considered partial and incomplete. Any user of this material is expressly prohibited from utilizing any of the information in any capacity whatsoever, unless they have consulted with a professional regarding the material being examined by the user. The professional consulted must be licensed and in good standing at the time of the consultation. It is the user's responsibility to determine the appropriate professional for a given subject area. Diamond Star Technologies, HandyFact, or associated organizations and personnel believe the information provided to be correct at the time of publishing of the material, but assume no liability for consequential or other damages attendant to the use of this material. The user of any and all material found here should assume that any given information may become obsolete the day after the material is first published. Also, the user acknowledges that they understand that it is impossible and/or impractical for the publisher to update or correct any information that is incorrect, false, or out-dated. In no event shall the liability of Diamond Star Technologies, HandyFact, or associated organizations and personnel for any claim, however designated, exceed the purchase price, if any, for this publication.
Copyright © 2009 Diamond Star Technologies, Inc. All
Rights Reserved. HandyFact is a trademark of Diamond Star Technologies, Inc.