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What is the decibel hearing protection to US employees?
90 dB is the US employee level for safety.
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.
What are pleasant and unpleasant sounds?
Pleasant sounds are those which make us feel happy, comfortable, or evoke positive emotions:ocean wavesmusic (different types, depending on the individual's taste)babbling brookfireplace cracklingchildren's laughterUnpleasant sounds are those which make us cringe, plug our ears, or evoke negative emotions. Examples:cryingdrilling/constructiontraffic/honkingsomething that might be startling, such as thunder, a glass breaking, or a sirenfireworks
What does sound mean in physics?
Sound is nothing more than a vibration which moves within a matter (it moves in air while you are speaking, for instance) It is not possible for us to hear sounds in space, which is obvious.
What causes us to hear some sounds as loud and others as quiet?
To answer this question, you need to know a little about human ear anatomy. In the ear we have the Basalar membrane that is a fluid like substance in the cochlea. As sound travels through the cochlea the memrane vibrates and causes waves. As the membrane moves it presses up against another membrane called the tectoral membrane that in turn is next to hair fibers. As the membranes moves it presses down on the hair fibers and we hear sound. The greater amplitude of the wave the louder the noise because the membrane is pressing hard against those hair fibers. This is the reason why continuous loud noise is not good for your hearing because those hair fibers can break. Once those hair fibers are not sending the correct signal to the brain, you can have hearing loss.
What is the material culture of the US?
Yarn
How thick is US 4ply knitting yarn is it the same as UK double knit or thicker?
4ply is NOT a yarn weight. Many 4ply yarns in the US are worsted weight. DK is a lighter yarn weight.
Why does hearing help us?
Hearing helps us listen.
what you can do with this Cashmere yarn for holiday let us see your ideas?
cashmere yarn fron OUAMA Etsy Shop
Where is the biggest ball of yarn on the east coast US?
The largest ball of yarn in the U.S. is located in Darwin, Minnesota, not on the East Coast. There is no record of a large ball of yarn on the East Coast.
What is a US halfdcr in crochet?
yarn over, insert hook into specified stitch or space, yarn over, pull through stitch (3 loops on hook), yarn over, pull through all 3 loops on hook
Why does the us export a lot of its cotton yarn but china does not?
china uses their cotton yarndomestically
What yarn can you substitute for Karabella Aurora 8?
Karabella Aurora 8 yarn is a multicolored tweedy-looking wool yarn. Specifics are:Fiber: 100% Merino WoolWeight: 50g Yardage: 98ydsNeedle size: US 7Gauge: 4.5 sts per 1"So, any yarn that fits those parameters would be substitutable.
Do giant pandas have hearing?
giant pandas have excellent hearing- even better than us!
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
Will there be a Kirby Wii game?
Kirby's Epic Yarn will be scheduled to come out October 1, 2010 in the US.
