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In "The Encyclopedia of Health", an article on the senses by Dale C. Garell, <br /> M.D. the following chart was listed showing various decibel levels: <br /> Subject dba <br /> Firearms 1 30-1 40 <br /> Jackhammer 120-130 <br /> Jet plane takeoff 110-120 <br /> Rock Music 100-110 <br /> Snowmobile 90-100 <br /> Lawn Mower 80-90 <br /> Alarm clock 70-80 <br /> Busy traffic 60-70 <br /> Conversation 50-60 <br /> Moderate rainfall 40-50 <br /> Whisper 30-40 <br /> I hope you will consider our position and allow us to run our car wash <br /> without closing the bay doors. If you have any questions, please give me a <br /> call. <br /> Sincerely, <br /> John Richmond <br />