10dB increase in volume needs what gain? - diyAudio
 10dB increase in volume needs what gain?
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 7th October 2009, 10:57 AM #1 diyAudio Member   Join Date: Mar 2009 10dB increase in volume needs what gain? Right I can't work out for the life of me what mu I need to increase signal 10dB, is it x10 or my other calculation of 3333.3 using two stages? It's for a feedback relay
 7th October 2009, 11:04 AM #2 Electrons are yellow and more is better! diyAudio Member     Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4 Gain in dB's = log(A)*20 where A is the gain Gain from dB' = 10^(dB/20) (10 powered to dB/20) 10 dB gain is 10^(10/20) = 3.1 Check also wikipedia for dB calculations. __________________ /Per-Anders (my first name) or P-A as my friends call me PA03 LM4780 amplifier group buy, SIGN UP HERE for the group buy 0 boards left. 118 paid.
 7th October 2009, 11:13 AM #3 diyAudio Member   Join Date: Oct 2009 I'm assuming you mean a x10 increase in volume means sound pressure level? In which case the correct formula are: 10log(Pout/Pin) for power giving 3dBm increase for a doubled sound pressure level or 10dBm for a ten fold increase. Translating that to a voltage gain into a load to achieve that sound pressure level gain you use: 20log(Vout/Vin) giving 6dB increase for a doubling of voltage and 20dB for a ten-fold increase.
 7th October 2009, 08:54 PM #4 diyAudio Member     Join Date: Aug 2006 Location: Cape Cod Here's the quick and dirty way to determine dB: http://www.sengpielaudio.com/calculator-db.htm

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