SOLUTION: A constant tone is being applied to a speaker, the voltage across the speaker is 5 volts. Volts increased to 15 volts in order to increase the sound level. what is the decibel gai

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: A constant tone is being applied to a speaker, the voltage across the speaker is 5 volts. Volts increased to 15 volts in order to increase the sound level. what is the decibel gai      Log On


   

Question 165839This question is from textbook
: A constant tone is being applied to a speaker, the voltage across the speaker is 5 volts. Volts increased to 15 volts in order to increase the sound level. what is the decibel gain? round to the nearest decibel This question is from textbook

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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A constant tone is being applied to a speaker, the voltage across the speaker is 5 volts. Volts increased to 15 volts in order to increase the sound level. what is the decibel gain? round to the nearest decibel
:
The decibel formula for voltage: db = 20*log(%28%28E1%29%29%2F%28%28E2%29%29)
:
E1 = 15 v; E2 = 5v
:
db = 20*log(%2815%29%29%2F%285%29%29)
:
db = 20*log(3)
:
db = 20 * .47712
:
9.54 db ~ 10 db gain