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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: distances... posted by Quest on March 31, 1999 at 13:43:15:
You are quite right. If you increase the measuring distance a factor of 2 linear units (2 times), then your audible power measurement will decrease by a factor of 4 linear units (4 times). This is because 2 squared equals 4 in this Inverse Square Law problem (measured power drops by the square of the distance increase). In order to maintain the same audible power measurement that you originally had when the measurement distance was closer, you must now increase the amplifier power by 4 linear units.A power increase by a factor of 4 linear units (4 times) is converted to a decibel power increase by [ 10 Log 4 ], which is 6 dB.
Kind Regards, Chris
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Follow Ups
- Yes, Inverse Square Law - Chris Fagas 09:09:20 04/01/99 (0)
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