Rescuers exposed to any noise in excess of ____ dB must be provided with appropriate hearing protection devices, which should conform to ANSI S3.19 or S12.6 and have a noise reduction rating of at least ____ dB.

• A. 90, 20
• B. 70, 15
• C. 100, 25
• D. 85, 10

Answer: (A)

The main idea is that hearing protection is required whenever the noise level is high enough to risk damage, and the protection used must be proven to meet specific performance standards. Rescuers facing loud environments should have devices that not only are available, but actually provide a guaranteed amount of attenuation. The standard dictates that those devices conform to ANSI S3.19 or S12.6, which are the tests and labeling used to verify how much noise the protector can reduce and how that reduction is communicated. A minimum attenuation of 20 dB is set to ensure that, even after typical wear and fit, the residual noise stays within safer levels. For example, if the environment is around 90 dB, using equipment with a 20 dB NRR can lower exposure to roughly 70 dB in practice, which is significantly safer for ongoing exposure. The other options would either set a lower protection requirement or imply insufficient attenuation to reliably protect in high-noise rescue scenarios.