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how much power does it take to break windows?
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<blockquote data-quote="MrBill2U" data-source="post: 778619" data-attributes="member: 553080"><p>Physics 101 folks...</p><p></p><p>There are two ways a window could be shattered by speakers:</p><p></p><p>1) overpressure: same thing that blows up houses in a nuclear explosion. 3 psi overpressure will blow out every window in your house. Real tough to get a 3 psi overpressure in car audio (read: 160+)</p><p></p><p>2) harmonics: if you find the resonant frequency of your window and can hit that perfect tone inside your car a tiny amount of wattage (read: less than 1) can shatter your window if played for long enough. The same principal can be used to knock over buildings. If you find a skyscraper that has a resonant frequency of 1hz and hit it every second on the second with absolute perfect timing it will sway back and forth... slowly at first then ever more violently until it eventually falls down. same principal as opera singers shattering wine goblets. tap a wine goblet then sing that exact same frequency back at it. If you hit the perfect frequency and hold it long enough you can shatter a wine goblet with your voice. (and I garantee you opera singers can not hit 160+db)</p></blockquote><p></p>
[QUOTE="MrBill2U, post: 778619, member: 553080"] Physics 101 folks... There are two ways a window could be shattered by speakers: 1) overpressure: same thing that blows up houses in a nuclear explosion. 3 psi overpressure will blow out every window in your house. Real tough to get a 3 psi overpressure in car audio (read: 160+) 2) harmonics: if you find the resonant frequency of your window and can hit that perfect tone inside your car a tiny amount of wattage (read: less than 1) can shatter your window if played for long enough. The same principal can be used to knock over buildings. If you find a skyscraper that has a resonant frequency of 1hz and hit it every second on the second with absolute perfect timing it will sway back and forth... slowly at first then ever more violently until it eventually falls down. same principal as opera singers shattering wine goblets. tap a wine goblet then sing that exact same frequency back at it. If you hit the perfect frequency and hold it long enough you can shatter a wine goblet with your voice. (and I garantee you opera singers can not hit 160+db) [/QUOTE]
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