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What sound decibels are harmful?
The sound pressure or its level can be harmful if it is moving too much your eardrums. "Permitted Exposure Time Guidelines - SPL" Sound pressure level Lp and permissible exposure time t: 115 dB = 0.46875 minutes (~30 sec) 112 dB = 0.9375 minutes (~1 min) 109 dB = 1.875 minutes (< 2 min) 106 dB = 3.75 minutes (< 4 min) 103 dB = 7.5 minutes 100 dB = 15 minutes 97 dB = 30 minutes 94 dB = 1 hour 91 dB = 2 hours 88 dB = 4 hours 85 dB = 8 hours 82 dB = 16 hours Lower dBs are said to be harmless.
What is the maximum intensity of sound which is ear can hear?
The ear drums are moved by the sound pressure deviations only. Therefore don't ask for sound intensity. Sound pressure is measured by an SPL meter. Very loud noise is aching. The "threshold of pain" has the value of about 130 dB Sound Pressure Level (SPL). "Permitted Exposure Time Guidelines - SPL" Sound pressure level Lp and permissible exposure time t: 115 dB = 0.46875 minutes (~30 sec) 112 dB = 0.9375 minutes (~1 min) 109 dB = 1.875 minutes (< 2 min) 106 dB = 3.75 minutes (< 4 min) 103 dB = 7.5 minutes 100 dB = 15 minutes 97 dB = 30 minutes 94 dB = 1 hour 91 dB = 2 hours 88 dB = 4 hours 85 dB = 8 hours 82 dB = 16 hours Lower dBs are said to be harmless There are accepted standards for recommended permissible exposure time for continuous time weighted average noise, according to NIOSH (National Institute for Occupational Safety and Health) and CDC (Centers for Disease Control and Prevention) in 2002. For every 3 dBs over 85 dB, the permissible exposure time before possible damage can occur is cut in half.
How many time more is the orchestra than the soloist if the orchestra has a sound intensity of 90 db and the soloist has a sound intensity of 70 db?
(90 dB - 70 dB) = 20 dB = 100 times as much sound power.(100 times 'as much' = 99 times 'more')
Is there more energy in a 30 dB or 40dB sound wave?
40 dB has ten times the power of 30 dB. 50 dB has another ten times as much power.
How much louder is a sound wave that has an intensity of 50 dB than a sound wave with an intensity of 20 dB?
The power in the wave is [ 30 dB = 1,000 times ] greater.
What sound level can damage the ear?
90 dB(A) is the OSHA 8 hour TWA 115 dB(A) is the OSHA 15 min Short Term Exposure Limit 140 dB(A) is the OSHA ceiling Exposure above these levels can cause hearing damage.
What is the allowable noise exposure for one hour a day?
"Permitted Exposure Time Guidelines - SPL"Sound pressure level Lp and permissible exposure time t:115 dB = 0.46875 minutes (~30 sec)112 dB = 0.9375 minutes (~1 min)109 dB = 1.875 minutes (< 2 min)106 dB = 3.75 minutes (< 4 min)103 dB = 7.5 minutes100 dB = 15 minutes97 dB = 30 minutes94 dB = 1 hour91 dB = 2 hours88 dB = 4 hours85 dB = 8 hours82 dB = 16 hoursLower dBs are said to be harmless
Exposure time is usually expressed in units of?
Time is usally expressed in hours, minutes, or seconds. "Permitted Noise Exposure Time Guidelines - SPL" Sound pressure level Lp and permissible exposure time t: 115 dB = 0.46875 minutes (~30 sec) 112 dB = 0.9375 minutes (~1 min) 109 dB = 1.875 minutes (< 2 min) 106 dB = 3.75 minutes (< 4 min) 103 dB = 7.5 minutes 100 dB = 15 minutes 97 dB = 30 minutes 94 dB = 1 hour 91 dB = 2 hours 88 dB = 4 hours 85 dB = 8 hours 82 dB = 16 hours Lower dBs are said to be harmless
What is the Daily recommended exposure to certain sound pressure level?
Permitted Exposure Time Guidelines - SPL Sound pressure level Lp and permissible exposure time t: 115 dB = 0.46875 minutes (~30 sec) 112 dB = 0.9375 minutes (~1 min) 109 dB = 1.875 minutes (> 2 min) 106 dB = 3.75 minutes (> 4 min) 103 dB = 7.5 minutes 100 dB = 15 minutes 97 dB = 30 minutes 94 dB = 1 hour 91 dB = 2 hours 88 dB = 4 hours 85 dB = 8 hours 82 dB = 16 hours Lower dBs are said to be harmless. Look at the link: "Loudness Comparison Chart".
Short term exposure to noises at 85 decibels or higher can cause what?
You can damage your hearing. It depends also on time. "Permitted Noise Exposure Time Guidelines - SPL" Sound pressure level Lp and permissible exposure time t: 115 dB = 0.46875 minutes (~30 sec) 112 dB = 0.9375 minutes (~1 min) 109 dB = 1.875 minutes (< 2 min) 106 dB = 3.75 minutes (< 4 min) 103 dB = 7.5 minutes 100 dB = 15 minutes 97 dB = 30 minutes 94 dB = 1 hour 91 dB = 2 hours 88 dB = 4 hours 85 dB = 8 hours 82 dB = 16 hours Lower dBs are said to be harmless
What sound decibels are harmful?
The sound pressure or its level can be harmful if it is moving too much your eardrums. "Permitted Exposure Time Guidelines - SPL" Sound pressure level Lp and permissible exposure time t: 115 dB = 0.46875 minutes (~30 sec) 112 dB = 0.9375 minutes (~1 min) 109 dB = 1.875 minutes (< 2 min) 106 dB = 3.75 minutes (< 4 min) 103 dB = 7.5 minutes 100 dB = 15 minutes 97 dB = 30 minutes 94 dB = 1 hour 91 dB = 2 hours 88 dB = 4 hours 85 dB = 8 hours 82 dB = 16 hours Lower dBs are said to be harmless.
What are two types of sound and their approximate decibel levels?
A normal conversation is about 70 decibels (dB). A gun firing off is about 140 dB.
How loud is an airplane?
Depending on the aircraft and type of engine, it will be around 140 DB.
How many decibels is a jumbo jet?
On takeoff, anywhere from 140 - 150 dB.
How much louder is the LRAD than the 120 decibels which is considered to the limit of pain?
Depending on model, a mounted LRAD is rated between 140 and 160 dB at the source, with a loss of 6 dB each time distance from the transmitter is doubled.
Hearing protecting should be worn when noise levels are above what?
Any gunshot above 140 dB will damage your hearing. An M16 is 155-163 dB An M60 is 155 dB at the shooters position.
How many decibels is are fireworks?
140 dB A normal conversation is about 60 dB (Just to let you know how loud fireworks are)
