The Level of a Sound in Decibels Is Calculated Using $D = 10 \cdot \log \left( I \times 10 ^ { 12 } \right)$

question 124

Multiple Choice

The level of a sound in decibels is calculated using the formula $D = 10 \cdot \log \left( I \times 10 ^ { 12 } \right)$ where I is the intensity of the sound waves in watts per square meter. A jackhammer puts out 1 watt per square meter. How many decibels is that?

• A) 12
• B) 10
• C) 120
• D) 1200

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