Write the word or phrase that best completes each statement or answers the question.
-Use the formula $\mathrm { D } = 10.0 \log \left( \mathrm { S } / \mathrm { S } _ { 0 } \right)$, where the loudness of a sound in decibels is determined by $\mathrm { S }$, the number of watt $/ \mathrm { m } ^ { 2 }$ produced by the soundwave, and $\mathrm { S } _ { 0 } = 1.00 \times 10 ^ { - 12 } \mathrm { watt } / \mathrm { m } ^ { 2 }$. A certain noise produces $2.54 \times 10 ^ { - 4 } \mathrm { watt } / \mathrm { m } ^ { 2 }$ of power. What is the decibel level of this noise? (Round to the nearest unit.)
A) 8 decibels
B) 74 decibels
C) 194 decibels
D) 84 decibels

Question

Quizplus · Accepted Answer

Using the formula, $D = 10.0 \log \left( \frac{2.54 \times 10^{-4}}{1.00 \times 10^{-12}} \right)$, calculate the decibel level: $D = 10.0 \log (2.54 \times 10^8) \approx 84$ decibels.

Write the Word or Phrase That Best Completes Each Statement D=10.0log⁡(S/S0)\mathrm { D } = 10.0 \log \left( \mathrm { S } / \mathrm { S } _ { 0 } \right)D=10.0log(S/S0​)

Write the Word or Phrase That Best Completes Each Statement $\mathrm { D } = 10.0 \log \left( \mathrm { S } / \mathrm { S } _ { 0 } \right)$