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

An occupational health and safety officer is reviewing hearing protection guidelines for an assembly plant. True or False: Extended exposure to noise that measures 85 dB can cause permanent damage to the inner ear, and earphones delivering a sound intensity of ${}10^{-2}$ watts per square inch yield a decibel level of 100 dB, exceeding this safety threshold.