Orange County NC Website
Browse       Search
iparative Examples of Noise Levels{Real World Examples and Decibel Levels)Industrial Noise Control <br /> Tom . _.. � _. •::.. -. ..; • <br /> Comparative Examples of Noise Sources, Decibels <br /> &Their Effects <br /> } <br /> VecibeF ,. ,. <br /> Noise Source <br /> Le el <br /> Jet take-off(at 25 meters) 150 Eardrum <br /> rupture <br /> 1 Aircraft carrier deck 140 <br /> Military jet aircraft take-off from aircraft carrier with afterburner at 50 ft 130 <br /> (130 dB). <br /> Painful.32 <br /> # Thunderclap,chain saw.Oxygen torch(121 dB). 120 times as <br /> bud as 70 i <br /> dB. }_ <br /> Average <br /> # Steel mill,auto hom at 1 meter.Turbo-fan aircraft at takeoff power at human pain <br /> 1 200 ft(118 dB).Riveting machine(I 10 dB);live rock music(108- 110 threshold. <br /> q i 14 dB}. 16 times as <br /> 7 loud as 70 <br /> dB. <br /> 8 times as <br /> Jet take-off(at 305 meters),use of outboard motor,power lawn loud as 70 ! <br /> mower,motorcycle,farm tractor,jackhammer,garbage truck.Boeing dB.Serious <br /> 707 or DC-8 aircraft at one nautical mile(6080 ft)before landing(106 100 damage <br /> dB);jet flyover at 1000 feet(103 dB);Bell J-2A helicopter at 100 ft possible in <br /> (100 dB). 8 hr <br /> exposure . <br /> 4 times as <br /> 1 Boeing 737 or DC-9 aircraft at one nautical mile(6080 ft)before loud as 70 <br /> landing(97 dB);power mower(96 dB);motorcycle at 25 ft(90 dB). 90 dB.Likely <br /> Newspaper press(97 dB). damage 8 <br /> # hr exp <br /> 2 times as <br /> Garbage disposal,dishwasher,average factory,freight train(at 15 loud as 70 <br /> meters).Car wash at 20 ft(89 dB);propeller plane flyover at 1000 ft dB. j <br /> (88 dB);diesel truck 40 mph at 50 ft(84 dB);diesel tram at 45 mph 80 Possible <br /> at 100 ft(83 dB).Food blender(88 dB);milling machine(85 dB); damage in i <br /> garbage disposal(80 dB). 8 hr i <br /> exposure. <br /> j Arbitrary <br /> base of <br /> comparison. <br /> Passenger car at 65 mph at 25 ft(77 dB);freeway at 50 ft from Upper 70s i <br /> pavement edge 10 a.m.(76 dB).Living room music(76 dB); radio or 70 are <br /> TV-audio,vacuum cleaner(70 dB). annoyingly <br /> loud to ; <br /> some i <br /> people. <br /> Conversation in restaurant,office,background music,Air conditioning Half as bud <br /> unit at 100 ft 60 as 70 dB.Fairly quiet <br /> i <br /> Quiet suburb;conversation at home.Large electrical transformers at One-fourth j <br /> 100 ft 50 as loud as t' <br /> 70 dB. <br /> One-eighth <br /> 3 Library,bird calls(44 dB);lowest limit of urban ambient sound 40 as loud as <br /> t 70 dB. <br /> One- <br /> 7 sixteenth as <br /> 7 Quiet rural area 30 loud as 70 <br /> dB.Very <br /> Quiet <br /> Whisper,rustling leaves 20 i <br /> Breathing 10 Barely <br /> audible <br /> [modified from http://www.wenet.netl hpb/dblevels.html]on 2%2000. <br /> SOURCES:Temple University Department of CiviUEnvironmental Engineering <br /> (www.temple.edu/departments/CETPlenvironl0-htmi),and Federal Agency Review of Selected <br /> Airport Noise Analysis Issues,Federal Interagency Committee on Noise(August 1992). <br /> Source of the information is attributed to Outdoor Noise and the Metropolitan Environment <br /> .M.G.Branch et,aL;.De artment of CV Planning,; Ci .of Las Angeles,..19 70_,-_ <br />