what is the cracking sound of a bull whip produced by?
373378
From Ask Yahoo!:\nA whip's tip travels over 1,400 feet per second when the whip is cracked -- much faster than the speed of sound, which is about 1,230 feet per second. Thus, the crack of a whip is actually a small sonic boom. The "crack" is the sound of air rushing back into the small vacuum created by the whip's cracker.
229948
TO CRACK IT...HIT IT WITH A BIG HAMMER
1046853
to be more specific a foley person finds alternative ways to replicate different sounds. ie snapping celery to make it sound like a bone is being broken, hitting a bag full of sand to make it sound like a thud or walking on cereal in a box to make it sound like your walking on gravel or in dry brush. It's actually pretty cool and takes a lot of imagination
454635
I spoke to a Dr. recently about this and he gave me am article about it............NO it is not it is an old myth, about arthritis and knuckles getting larger, the cracking sound that is heard is only gasses in the joint and by cracking them it just releases the gas...and then when the gas refills the joint it can be popped again
524683
There's quite a lot of information on the web. Use Google to find stuff! Here's one link:\nhttp://www.toucans.net/Toc/makePan.html\n\n... and the Google search I used:\nhttp://www.google.com/search?sourceid=navclient-ff&ie=UTF-8&rls=GGGL,GGGL:2005-09,GGGL:en&q=steel+drums+making
219299
Thunder is the sound of the shockwave caused when lightning instantly heats the air around it to up to 30 000 °C (54 000 °F). That super-heated air expands rapidly, then contracts as it cools. The rapid expansion/contraction generates sound waves, making the sound that is called "thunder."
607885
steel drums\n\nhttp://www.toucans.net/Toc/makePan.html   (making one)
1049763
it's Shake, Break Bounce by Chemical Brothers. Probably.
161386
Probably ultrasonic....
337956
Sounds like a kideny stone
88152
Cracking knuckles is the practice of manipulating one's fingers such that the hand (most usually the knuckle joint) produces a sharp sound, likened to cracking (also likened to popping, etc). To produce the sounds, many people will bend their fingers into unusual positions, or manipulate them in ways which are not commonly experienced in everyday use. For example, bending the fingers right back towards the back of the hand, or pulling them away from the hand.\n\nIn many early motion pictures and subsequently parodied in animated cartoons, the gesture of cracking knuckles was associated with a "tough guy" image, especially when accompanied by the implicit or explicit threat of violence.\n\nThe physical mechanism is unknown, but possibilities that have been suggested include:\n\ncavitation within the joint – small cavities of partial vacuum form in the fluid then rapidly collapse, producing a sharp sound (hypothesis in a medical journal) \nthe sudden stretching of ligaments (hypothesis by one reader of that journal) \nrelease of gas from the joints being adjusted (this applies to the popping that can occur in any joint such as during chiropractic manipulation) \nA single event is not enough to cause damage to the joint, although it is possible that prolonged joint stress due to cracking knuckles may eventually lead to a higher risk of joint damage. The long-term consequences of this practice have not been studied thoroughly, and the scientific evidence is inconclusive. However, the common parental advice "Cracking your knuckles gives you arthritis" may be simply a device to deter children from this practice, which many people find annoying because of the sound it makes. In actual fact, study by Castellanos and Axelrod showed that arthritis was not a product of knuckle cracking. They evaluated 300 consecutive outpatients at Mount Carmel Mercy Hospital to determine whether habitual knuckle cracking is a risk factor for hand dysfunction. They found no relation with osteoarthritis, but noted that 'knuckle crackers were more likely to have hand swelling and lower grip strength.'\n\nA chiropractic perspective:\n\n"As a joint is being distracted, the capsule invaginates inward and as the stress on the capsule reaches a certain threshold, it suddenly snaps back from the synovial fluid, increasing the volume of the capsule (and decreasing pressure) and causing the audible sound. The sudden increase in the volume causes the tension to drop, allowing the joint to increase in movement. Eventually, the elastic limit of the capsule is reached and the process stops. The time elapsed during all this is shorter than that required for completion of the stretch reflex, so it can occur without muscular resistance. The sudden jerk on the capsule and the other periarticular tissues is theorized to cause firing of the high-threshold mechanoreceptors."
529737
This is called the thunder clap headche.  Look this up on Google
285049
I don't think the ricers sound good at all.  Give me my AMERICAN rumble.  Drown the ricers.  Nothing sounds better then an American rumble (GT Mustang 3" pipes with a flowmaster 80's).  Don't know why anyone would want to sound like a dirt bike or a ticked off wasp.
554109
use ultrasonic machine... the sound waves should shatter it to smithereens
694463
when you exhale as you hit you put more energy into it.  that is the sound it makes through the mouth guard.
588032
In petroleum geology and chemistry, cracking is the process whereby complex organic molecules (e.g. kerogens or heavy hydrocarbons) are converted to simpler molecules (e.g. light hydrocarbons) by the breaking of carbon-carbon bonds in the precursors. The rate of cracking and the end products are strongly dependent on the temperature and presence of any catalysts.\n\nKnocking (also called pinking or pinging)—technically detonation—in internal combustion engines occurs when fuel/air mixture in the cylinder has been ignited by the spark plug and the smooth burning is interrupted by the unburned mixture in the combustion chamber exploding before the flame front can reach it. Combusting stops suddenly, because of the explosion, before the optimum moment of the four-stroke cycle. The resulting shockwave reverberates in the combustion chamber and pressures increase catastrophically, creating a characteristic metallic "pinging" sound.
689779
My doc said it was normal to hear cracks every now and then...joints are supposed to move around (like when your back cracks when you stretch).\nMost of the time, the popping noise heard when you 'crack' joints is simply gas bubbles being forced out of cavities within the joint.\nIn such cases, there is little or no damage done, even in people who do it for fun.