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To put this in perspective, I called the Minnesota Pollution Control Agency <br /> today and spoke to Mr. Brian Tiemerson. He is a specialist in noise <br /> pollution. In asking for various examples of noise levels, he stated that no <br /> figure is absolute. In reading a reference from a book on acoustics, he <br /> gave me the following examples of different decibel levels: <br /> Subject dba <br /> Rock concert 120 <br /> Pneumatic drill 110 <br /> Wood joiner 100 <br /> Chain saw 90 <br /> Truck traffic 80 <br /> Business office 70 <br /> Conversation 60 <br /> Library 50 <br /> Bedroom 40 <br /> Secluded woods 30 <br /> Whisper 20 <br /> As you can observe, 66 dba at the curb line is nothing out of the ordinary. <br /> A recent article in the "Star Tribune" on January 16, 1999, the noise <br /> levels for a recent Viking game at the Metrodome was discussed. A chart <br /> of noise levels showed the following: <br /> Subject dba <br /> Ear damage 150 <br /> Jet at 100 feet 140 <br /> Pain Threshold 130 <br /> Metrodome - <br /> 1987 World Series 120 <br /> Rivet gun 110 <br /> Jackhammer 100 <br /> Heavy traffic 90 <br /> Vacuum cleaner 80 <br /> Loud conversation 50 <br /> Normal conversation 30 <br /> Light whisper 10 <br /> Hearing threshold 0 <br /> Again, reviewing the figures shows that 66 dba does not appear to be <br /> severe. <br />