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FIGURE D.1 <br /> NOISE SOURCE A-VAwighled Sound Lmw1 <br /> de(A) NOISE SOURCE <br /> T <br /> THRESHOLD OF PAIN <br /> SMALL AIRCRAFT OVERHEAD =-2 — <br /> RIVETING MACHINE 30 TO 40 FEET <br /> —10 <br /> TRAIN PASSING 50 FEET — .— <br /> AUTOMOBILE HORN 59 FEET AWAY <br /> NOISY STENOGRAPHIC ROOM <br /> J-70– AVERAGE CONVERSATION, 3 FEET <br /> NOISY OFFICE <br /> NOISY RESIDENCE INTERIOR <br /> QUIET OFFICE — <br /> VOICE - VERY SOFT WHISPER, 3 FEET — <br /> OUTDOOR IN RURAL AREA <br /> THRESHOLO OF AUDIBILITY --CF <br /> REPRESENTATIVE NOISE SOURCES <br /> AND LOCAL SOUND LEVELS <br /> Source: Reese-Chambers Assoc. <br /> ENGINEERING-SCIENCE <br />