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anonymous
 one year ago
You hear sounds at the following decibel levels: 5 dB, 10 dB, 20 dB, and 40 dB. Which sound is 10 times higher than the lowest pressure humans can hear?
A. 5 dB
B. 10 dB
C. 20 dB
D. 40 dB
**Not sure how to find this!! :( Thank you!!:)
anonymous
 one year ago
You hear sounds at the following decibel levels: 5 dB, 10 dB, 20 dB, and 40 dB. Which sound is 10 times higher than the lowest pressure humans can hear? A. 5 dB B. 10 dB C. 20 dB D. 40 dB **Not sure how to find this!! :( Thank you!!:)

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Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1we have to use this definition: \[\Large N = 10{\log _{10}}\left( {\frac{{{P_1}}}{{{P_0}}}} \right)\] where N is the number of decibels, and P_0 is a reference pressure

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh okay! how can we find what to plug in?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1we have to know how much is the lowest pressure

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ohhh would the lowest pressure be the 5 dB?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0or wait, it is 5 dB? :/

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1no, sorry, we can answer to your problem without know how much is the lowest pressure. Since we can write the lowest pressure as our reference pressure, and we can set P_1 = 10*P_0

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1so we have: \[\Large \begin{gathered} {P_1} = 10{P_0} \hfill \\ N = 10{\log _{10}}\left( {\frac{{10{P_0}}}{{{P_0}}}} \right) = ...? \hfill \\ \end{gathered} \]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ohh so that is our solution? 10 dB? :O
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