# Question on sound intensity and dB

• Krystal111
In summary, if ear protectors can reduce sound levels by 40dB, then the sound intensity would be reduced by the factor of 40dB.

#### Krystal111

Homework Statement
By what factor is the sound intensity reduced if ear protectors can reduce sound levels by 40dB?
Relevant Equations
I can't seem to find any
Would we have to use the 3-dB exchange rate? How would we solve this question?

Krystal111 said:
Homework Statement:: By what factor is the sound intensity reduced if ear protectors can reduce sound levels by 40dB?
Relevant Equations:: I can't seem to find any

Would we have to use the 3-dB exchange rate? How would we solve this question?

A decibel would be a unit of measurement that is equal to one tenth of a bel.

It expresses the ratio of two values of a power or root-power quantity on a logarithmic scale. Two signals whose levels differ by one decibel have a power ratio of 101/10 or root-power ratio of 10¹⁄²⁰ - as per what wikipedia states

@Krystal111 first, all caps in a thread title is the Internet equivalent of shouting. Second, the title of your thread should be a brief description of your question, not a statement (irrelevant to anyone responding here in any case) that you need help, let alone need help "ASAP". Please review the rules for posting homework questions.

Great, so you can cite Wikipedia. Now what does this all mean? It literally tells you the power ratio for 1 dB, so how would you translate that to 40dB? And what is intensity? How is that related to power?