You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

First off a dB or decibel is one tenth of a Bell, not ten times a Bell. The metric prefix deci means 1/10 while the prefix deca means times 10.

Next, do not confuse power and voltage when talking dB. When you double power you increase by 3 dB but when you double voltage you need to increase it by 6 dB thus the 1.41 versus 2.0 times error above. When halving the output from a signal generator you reduce the output by 6 dB as the generator references voltage and not power.

dB chart voltage power table conversion sound pressure sound intensity decibel voltage level levels ratio dbu dBA dBm absolute relative acoustic measurement volts watts and pascals database - sengpielaudio

[QUOTE="Captain Kilowatt, post: 415256, member: 39"] First off a dB or decibel is one tenth of a Bell, not ten times a Bell. The metric prefix deci means 1/10 while the prefix deca means times 10. Next, do not confuse power and voltage when talking dB. When you double power you increase by 3 dB but when you double voltage you need to increase it by 6 dB thus the 1.41 versus 2.0 times error above. When halving the output from a signal generator you reduce the output by 6 dB as the generator references voltage and not power. [url=http://www.sengpielaudio.com/dB-chart.htm]dB chart voltage power table conversion sound pressure sound intensity decibel voltage level levels ratio dbu dBA dBm absolute relative acoustic measurement volts watts and pascals database - sengpielaudio[/url] [/QUOTE]

Top Bottom