my friend 2 day went to the local audio shop an the 1 guy told him they had a truck or car that did like 180sutmhin db an he said its enough 2 make ur heart stop an set off a peacemaker by the car or w/e is that true a car can that much db ill try find out more whne i go
Port wars is the only way to reach in the 180's I believe. The world record is 178 and some change. When you go back and find out some more info, see what kind of meeter was used, and if it was legal. Do to the atmosphere, I don't think its possable to reach that kind of pressure. The spaceshuddle is louder, but the fuel burning changes the atmosphere allowing it to do so.
P.s, don't for get to find out what kind of equipment was used.:-)
Lol yeah. I actually sat in a truck that could stop a heart. As you can tell, he didn't completely turn it up,:-) but he turned it quite aways up. I can't even describe what it felt like. Maybe like a miget trying to fight his way out of my chest. Either way, I almost crapped my pants. Defenantly couldn't breathe.
The only way I can see 150 DB stopping your heart is if you already have a heart condition. People sit in 150+ DB cars on burps without even covering their ears (bad idea, but it's true).
194db is considered the theoretical maximum SPL, which is double atmospheric pressure when compressing and a perfect vacuum during rarefaction. It is considered this because the amount of compression will be equal to atmospheric pressure, after that you have surpassed the pressure of the atmosphere and no compression occurs. The only way you could go past 194 would be if you changed air properties, did the test where pressure is higher (underwater, or under sea level), or create a shockwave, basically a sonic boom, which would require that the speaker move faster than the speed of sound.
I was speaking hypothetically. I thought since water is more dense than air, more pressure could be created, therefore a solid should produce more pressure than water.
Not a solid, but a dense liquid so you have movement. But that would require imense amounts of power. It's been deemed "litterally impossible" as we decided in a class I took in the Marines.
Here's one at what db does your typical auto-grade glass "break"? Since we all know that front windows don't shatter like typical windows are they tougher to break? Do you have to hit a certain Hz. to break it? (I am sure everyone has heard of the high c note breaking glass)...Just wondering since were all getting so scientific...LOL
Yes, Andy, the frequency does play a part, if you had a tweeter powerful enough to hit high enough frequencies at that amplitude, then yes, it could be done.
Low-frequency sound (below 1,000 hertz) goes farther. You may not be able to hear the singers on your neighbor's stereo, but you can hear the bass.
ATOC uses the ocean's natural channels to transmit low frequency thousands of kilometers. Sound travels slightly faster in warmer water. Scientists believe that by measuring how fast sound travels across the cooler "Deep Sound Channel" in comparison with its speed in other parts of the ocean, they can detect a global warming trend.
The noise about noise Whales sing low and loud. Their sounds travel thousands of miles. Blue whales off Newfoundland can be heard in Puerto Rico, said Dr. Christopher W. Clark, a principal investigator of both ATOC and LFA's mammal research. Not by humans, whose ears are made for air and who rely more on vision anyway, but by sonar detectors, and presumably by whales.
Whales depend on hearing the way humans depend on sight. They use their sonar to find food, detect enemies, attract mates and know where their children are.
Scientists say low-frequency sonar, if loud enough, has the potential to drown out the whales so they can't hear what they need to. Whales listening intently for the quiet swish of a school of fish may go hungry. A 3-month-old whale who leaves his mother's side to begin to explore his world may not hear her calling to him and may never find her again.
It could do other damage, too.
Very loud sounds can rip ear, lung and other vibrating tissues. A sound wave is a pressure wave; that's why you can sometimes feel your body vibrate during loud, low sounds. When body tissues resonate with the sound's frequency, the pressure increases.
Repeated exposure to moderately loud sounds can damage human ears, as rock musicians have learned.
Even milder sounds can be annoying, stressful, distracting (picture the golfer about to swing) or confusing.
Some sounds attract whales toward boats, making them more vulnerable to collision.
Sometimes whales fall silent. Sperm and pilot whales stopped "singing" (using their active sonar) altogether during a 220 decibel test in 1991, some of them for days, which meant they were not eating during that time.
Whales may fall silent to hide from their sharp-eared predators (killer whales, or orcas). Because silence evolved as their survival response, they hush at any strange noise.
When they're not using their active sonar, whales are not courting potential mates, and they may not be finding food. Deep-water whales, the kind with teeth, are thought to use echolocation (active sonar) for navigation and hunting.
Sounds booming at regular intervals also could interfere with whales' sleep. Little is known about how whales and dolphins sleep, except that they must surface to breathe. "In humans, prolonged or repeated noises can cause difficulties in falling asleep, changes in sleep patterns, and awakenings," says the often-cited book "Marine Mammals and Noise" by W. John Richardson et al.
Chronic noise may lead to high blood pressure in humans, and strong noise can affect reproduction and rearing of young in land animals, Richardson's book adds.
Repeated stress can take a toll on an animal's immune system, leaving it more vulnerable to parasites and other infections.
Extreme stress or panic may cause whales to lose their way and wash up on beaches; or their disorientation may result from damage to their hearing or another aspect of their navigational sonar system.
You know the whale in seaworld? What would happen if you jumped in the tank with it... and he let out a nice blast of 200 DB's, just trying to have a friendly conversation?:-) You think it would nock you out, and dround, or just kill you?
lets water proof all our subs, go diving, and have underwater spl contests. i bet you could hit alot lower notes too, lol. bye the way, I'm out in LaCrosse WI, and Soundworld out here had there anual contest and a friend of a friend got second place with just under 189 db, i never herd what first hit.
"Here's one at what db does your typical auto-grade glass "break"? Since we all know that front windows don't shatter like typical windows are they tougher to break? Do you have to hit a certain Hz. to break it? (I am sure everyone has heard of the high c note breaking glass)...Just wondering since were all getting so scientific...LOL"
Its not really a high C note that does it, thats just the famous example with the opera singer, lol.
You can break glass or whatever if you play a certain freq. The freq has to be the same as that of the resonant freq of the atom in the object. Basically the freq at which the atoms are moving around in the glass has to be the same as the note your playing. When this happens the glass will break.
Its not easy to do this in a car bc the glass isnt pure, it has other materials added to it, thus making it hard to match one resonant freq. when there are actually many resosant freq. to match.
In a car, it will prolly only be amplitude that will crack the glass.
if there is enough pressure form the inside the glass should break, ppl i know have only either broken very large windows like rear windows or side windows in a van or there very small windows. and if there is hard enough vibrations im sure it will break.
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