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90 dB is the US employee level for safety.
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∙ 14y ago
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HOW DO CLOTHES HELP US?
If it's cold, clothes keep us warm. If we need to be around sharp stuff, clothes offer a bit of protection. If we need to be out in intense sunlight, clothes protect against that too.
What pitch is high frequency?
What we consider a "high pitched frequency" is the upper end of our normal hearing range. The normal hearing range of human beings is roughly 10 hertz to 25,000 hertz. Sound is transmitted from point to point by series of compressions of air. The number of these compression packs in any given second is a hertz (also referred to as cycles per second). Low frequencies (pitches) take more power to produce compared to higher frequencies. An interesting phenomenon in humans is that as we age we lose the ability to sense the upper range of our hearing. There are now phone ring tones that only young people can hear, because us old folks have lost the ability to hear the sound.
What are the units of radiation doses?
Sieverts and milliSieverts are used now. They replaced the old rem and millirem. There is a factor 100 difference, so 1 Sievert = 100 Rem. The current limit for nuclear industry employees is 20 milliSv/year, though the actual average level in the US is about 2.4 milliSv.
What is the necessary condition for the production of sounds?
Sound is a variation in air pressure, within the range of hearing of the subject. Bats do better at higher frequencies, and elephants do better than us at infrasonic frequencies. Sound is a subjective phenomenon - as is that part of it we call 'noise'. But sound does require a physical medium for its propagation - sound will not travel in a vacuum.
How many quarts are in 5 gallons of orange juice?
5 qt(US Liq) = 159.999 fl oz(US)5 qt(US Liq) = 159.999 fl oz(US)5 qt(US Liq) = 159.999 fl oz(US)5 qt(US Liq) = 159.999 fl oz(US)5 qt(US Liq) = 159.999 fl oz(US)5 qt(US Liq) = 159.999 fl oz(US)
US employees must wear hearing protection at dB or above?
90db
Why does hearing help us?
Hearing helps us listen.
How much do decibel machines cost?
From $49.99 (US) at Radio Shack to several hundred dollars, depending on features.
How do you convert db loss to feet?
That can't be done. Feet is an US amercan length unit and decibel loss is a ratio.
Are US senators and representatives federal employees or state employees?
Federal
What part of the atmosphere gives us protection?
The ozone layer gives us the protection from radiation
Do giant pandas have hearing?
giant pandas have excellent hearing- even better than us!
What are the nouns in the sentence New laws in the US call for their protection?
The nouns in the sentence are laws, US, and protection.
How many General Motors Employees outside of US?
As of Dec 31, 2010, GM had 106,000 employees outside the US and another 96,000 inside the US.
How many employees are in the US Department of Commerce?
Approximately 38,000 employees. Source: whitehouse.gov
What causes us to stop hearing?
Wax in the ears is the most common cause, which make you stop from hearing.
What is residual hearing?
This is the term used to describe the hearing that remains after a hearing loss occurs. Most people with significant hearing loss still have some residual hearing that can be stimulated by amplifying sound using a hearing aid. . www.medel.com.ar/ENG/US/50_Resources/010_glossary.asp
