If there is an impact noise or 143 dBA, what type of hearing protection is required?

In a situation where the noise level is as high as 143 dBA, the recommendation for hearing protection is critical. At this intensity, the sound is significantly above the threshold that can cause immediate auditory damage. Single hearing protection, which typically includes earplugs or earmuffs designed to reduce sound levels, is often not sufficient for such extreme noise environments.

For noise levels above 140 dBA specifically, regulations and safety guidelines generally dictate that double hearing protection is necessary. This involves using a combination of both earplugs and earmuffs to provide an extra layer of protection against loud noises, minimizing the risk of permanent hearing loss.

Choosing single hearing protection would not adequately safeguard hearing in this case, as the protection provided may not reduce the sound exposure to a safe level. Therefore, while single hearing protection is useful for lower noise levels, it would not be appropriate for a noise level of 143 dBA, making double hearing protection the proper choice in this scenario.