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� <br />� <br />CHANGES IN INTENSITY LEVEL (or dB) <br />Changes in Intensity Levet, dB Changes in Apparent Noise Level <br />1 Almost imperceptible <br />3 Just perceptible <br />5 Noticeable to most <br />10 Easily Noticeable to all <br />I hope that this report has provided you with useful information. In the interim, if you <br />should have any questions or would like to discuss the contents of this report please don't <br />hesitate to contact me at any tirne. <br />Sincerely, <br />Dominion <br />By�// <br />Vern L. Crow, I.H. <br />President <br />