A workplace safety officer is evaluating the noise levels of industrial earphones to prevent hearing damage. To calculate the decibel level $D$ of the sound based on its measured intensity $I$ (in watts per square inch), which formula should the officer use? (Note: The constant ${}10^{-12}$ represents the threshold intensity of sound.)

As a safety coordinator evaluating workplace equipment, you must ensure workers are protected from hearing loss. Extended exposure to noise that measures ____ dB can cause permanent damage to the inner ear.

An acoustics technician is documenting the safety verification process for a pair of industrial earphones. Arrange the following steps in the correct order to show how to calculate the decibel level for earphones with an intensity of $I = 10^{-2}$ watts per square inch, based on the standard procedure.

As a workplace safety inspector, you must identify the components of the decibel formula $D = 10 \log\left(\frac{I}{10^{-12}}\right)$ used to evaluate earphone safety. Match each variable or value with its correct description according to standard acoustic safety protocols.

Industrial Earphone Safety Assessment