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A dangerous sound level is defined as above 85db to cause hearing damage. Long term exposure to 80 db can also damage hearing.
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∙ 9y ago
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Can your own screaming damage your ears?
Yes, if you can produce more than 85dB of noise. The louder the scream above this threshold, the faster you can damage your hearing. At 100dB, it takes about 20min. Normally it is unlikely unless you scream a lot. Opera singers sometimes have hearing damage due to the loudness and time extent of their singing.
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.
What is the maximum intensity of sound which is harmless to man?
130 db is the level of pain. Anything above this causes ear drum damage.
How can hearing be tested?
Hearing can be tested by a tests called audiometric tests, in which the patient is subjected to sounds of varying frequency and intensity and the amount of intensity that has to be raised above the normal level for that particular frequency is plotted on a chart.By this test, the threshold of hearing by air and bone conduction can be known and also type and degree of hearing loss can be assessed. There are various other clinical tests for hearing like finger friction test, watch test, voice test (these are obsolete now) and tuning fork tests- Weber's and Rinne's test.
What is the difference between loudness and intensity?
Sound intensity or acoustic intensity can be calculated from the objective measurement of the sound pressure. The loudness is a psycho-acoustic subjective feeling, which is difficult to measure.
How can you protect your sense of hearing?
You can protect your sense of hearing, simply by avoiding yourself listening to harsh, loud sound. A sound above 85 decibels can cause hearing loss. 8hours exposure to a 90- decibel sound can cause damage to your eardrums. Any exposure to 140-decibel sound causes immediate damage and can cause actual pain.
Is hearing can be damaged at 60dB or above?
no at 130dB or above
What other sounds are harmful to your ears?
Any sound which is over 80 decibels and continual will damage a persons hearing, any sound above 89 decibels and ear protect must be worn if the noise is continual or permanent deafness becomes a high risk - regardless of where or from what the sound comes from. 100 decibels is about the noise of a plan leave.
Can your ears be injured by loud whistle?
It depends on whether you are talking about a mechanical whistle - such as a steam whistle or one produced by a person using their mouth and fingers and especially the length of time you are exposed to the sound and how close you are to the source.Continual exposure to any sound above 85 decibels can cause hearing loss.At 90 decibels, a hair dryer and lawn mower can cause damage after 2 hours-which is non-threatening for most of us (unless you have a big lawn or Rapunzel-esque hair).A rock concert, at 110 decibels, can cause permanent hearing loss in 45 minutesReferee whistles range from around 113 to 128 - so the loudest ones could start giving you problems with about 15 seconds of exposure.A typical train whistle at 500 feet is only 90 dB (so it would take around 2 hours continuous to damage your hearing) but, if you are closer, it could cause damage much quicker. At around 100 feet it would be about 104 db and could damage your hearing in about 7½ minutes. At around 16 feet it would be around 120 db and could damage your hearing in about 10 seconds. the loudest steam whistles are around 130-135 db at 23 feet and could damage your hearing just 10 seconds or less.The louder it gets, the less time it takes to inflict damage.At 140 dB, even short term exposure can cause permanent damage - which corresponds to a jet engine at 100 feet or a steam whistle at about 1½ feet.
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.
How loud is sound?
Sound is as loud as a piece of string is long - swapping the SI units from m to dB of course.add. Approximately one-half of the population can hear sounds below 0dB. (Assuming no damage.) Ordinary speech at 1.5m is perhaps 75dB, and loud speech at the same distance perhaps 85 - 90 db. To preserve your hearing, you should use hearing protection above these levels.The loudest sounds we should hear are about 120dB. Sounds above 130dB may cause instant damage. Above 140dB will be felt as pain.
What happens when light intensity rises above 9000 lumens?
It stays constant
