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Very Quiet.Ĭopyright © 2022 IAC Acoustics. Audiologists use decibels to set hearing aids to the comfort of the user on a scale. The lowest (quietest) sound on a decibel scale, which is considered near-complete silence, is 0 dB. In the case of a cooling fan, you should also reference the amount of airflow it produces to see if the fan will cool the PC. There are also other factors to consider like the performance of the given part. Library, bird calls (44 dB) lowest limit of urban ambient sound Decibels (dB) are units that are used to measure sound level/intensity. How big is the total level of 4 fans with the same volume Solution: 20 dB (A) + 10 log 4 20 + 6 26 dB (A). Of course, sounds and your sensitivity vary in different situations and environments. Thus, the following sounds are relatively safe. Large electrical transformers at 100 feet. Sounds with Safe Decibel Levels An upper limit of about 70-80dB is what the EPA deems safe to listen to throughout a 24-hour period. Upper 70s are annoyingly loud to some people.Ĭonversation in restaurant, office, background music, Air conditioning unit at 100 feet. Living room music (76 dB) radio or TV-audio, vacuum cleaner (70 dB).Īrbitrary base of comparison. Passenger car at 65 mph at 25 ft (77 dB) freeway at 50 ft from pavement edge 10 a.m. Food blender (88 dB) milling machine (85 dB) garbage disposal (80 dB).Ģ times as loud as 70 dB. Car wash at 20 ft (89 dB) propeller plane flyover at 1000 ft (88 dB) diesel truck 40 mph at 50 ft (84 dB) diesel train at 45 mph at 100 ft (83 dB). Garbage disposal, dishwasher, average factory, freight train (at 15 meters). Newspaper press (97 dB).Ĥ times as loud as 70 dB. Serious damage possible in 8 hr exposure.īoeing 737 or DC-9 aircraft at one nautical mile (6080 ft) before landing (97 dB) power mower (96 dB) motorcycle at 25 ft (90 dB). Decibel Level Chart of Common Sounds, 2.1 Painful & Dangerous, 2.2 Uncomfortable, 2.3 Very Loud, 2.4 Irritating, 2.5 Loud, 2.6 Moderate, 2.7 Soft, 2.8 Very Quiet, 2.
Boeing 707 or DC-8 aircraft at one nautical mile (6080 ft) before landing (106 dB) jet flyover at 1000 feet (103 dB) Bell J-2A helicopter at 100 ft (100 dB).Ĩ times as loud as 70 dB. Jet take-off (at 305 meters), use of outboard motor, power lawn mower, motorcycle, farm tractor, jackhammer, garbage truck. Riveting machine (110 dB) live rock music (108 - 114 dB).Īverage human pain threshold. Turbo-fan aircraft at takeoff power at 200 ft (118 dB).
Military jet aircraft take-off from aircraft carrier with afterburner at 50 ft (130 dB). Recommended product: Outdoor Noise Barriers
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