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How loud can we get?
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<blockquote data-quote="Ed Lester" data-source="post: 5043004" data-attributes="member: 587479"><p>OK, anyone want an SPL lesson?</p><p></p><p>I have discussed this many times so you can probably just search for loudest possible sound or something.</p><p></p><p>But,</p><p></p><p>181.3dB is the loudest score ever achieved at an official SPL competition. done by Edge Audio in dB Drag Racing.</p><p></p><p>194dB is the loudest achievable "Sound" Anything over this will create an overpressure shockwave and will technically not be considered sound.</p><p></p><p>This is because 194 dB represents a perfect vacuum. Bot positive pressure and vacuum are created to make a sound wave.</p><p></p><p>Once there is a 100% vacuum, we can not increase the sound.</p><p></p><p>So any level above 194 dB will have more positive pressure as compared to vacuum so it will be distorted.</p><p></p><p>Explosions can reach levels almost up to 220 dB but it is not SPL.</p><p></p><p>185 dB represents about 1 atmosphere of pressure above current atmosphere during compression. This is theoretically the loudest that will be achieved using autosound equipment the way that we know it.</p><p></p><p>You can read dB in PSI as during compression there will be pressure applied.</p><p></p><p>I had a chart somewhere, once I find it, I will post it.</p><p></p><p>Some of us dB Draggers actually worked with the US Military to study the effects of SPL on the human body.</p><p></p><p>anything over 172 will burst capilaries in the human skin and you will start to bleed through your skin.</p><p></p><p>Your eyesight is temporarily lost at 165 and continued exposure will rupture bloood vessels in your eyes.</p><p></p><p>At 150 dB your heart skips a beat.</p><p></p><p>At about 160 your lungs cannot pull in air and continued exposure can suffocate you.</p><p></p><p>I forget the rest right now.</p><p></p><p>Many people sat in the Team Gates Bronco back then and didnt get hurt. One reason was because they never burped it at full power,</p><p></p><p>They also had people sit on the driver side which was 10 dB less then the passenger side, and the doors were usually open which dropped the SPL even further.</p><p></p><p>Also, That Bronco can only do a 163 or 164 on the new Term Lab.</p></blockquote><p></p>
[QUOTE="Ed Lester, post: 5043004, member: 587479"] OK, anyone want an SPL lesson? I have discussed this many times so you can probably just search for loudest possible sound or something. But, 181.3dB is the loudest score ever achieved at an official SPL competition. done by Edge Audio in dB Drag Racing. 194dB is the loudest achievable "Sound" Anything over this will create an overpressure shockwave and will technically not be considered sound. This is because 194 dB represents a perfect vacuum. Bot positive pressure and vacuum are created to make a sound wave. Once there is a 100% vacuum, we can not increase the sound. So any level above 194 dB will have more positive pressure as compared to vacuum so it will be distorted. Explosions can reach levels almost up to 220 dB but it is not SPL. 185 dB represents about 1 atmosphere of pressure above current atmosphere during compression. This is theoretically the loudest that will be achieved using autosound equipment the way that we know it. You can read dB in PSI as during compression there will be pressure applied. I had a chart somewhere, once I find it, I will post it. Some of us dB Draggers actually worked with the US Military to study the effects of SPL on the human body. anything over 172 will burst capilaries in the human skin and you will start to bleed through your skin. Your eyesight is temporarily lost at 165 and continued exposure will rupture bloood vessels in your eyes. At 150 dB your heart skips a beat. At about 160 your lungs cannot pull in air and continued exposure can suffocate you. I forget the rest right now. Many people sat in the Team Gates Bronco back then and didnt get hurt. One reason was because they never burped it at full power, They also had people sit on the driver side which was 10 dB less then the passenger side, and the doors were usually open which dropped the SPL even further. Also, That Bronco can only do a 163 or 164 on the new Term Lab. [/QUOTE]
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