Under what condition is continuous noise a risk factor?

Continuous noise becomes a significant risk factor when it exceeds a certain threshold, which is indicated by the decibel (dBA) level. For sustained exposure to noise, levels above 85 dBA are generally considered hazardous to hearing, leading to potential long-term damage.

The value stated in option C, above 104 dBA, represents an even higher risk threshold. Exposure to noise at this level greatly increases the likelihood of hearing loss, especially with extended duration. The Occupational Safety and Health Administration (OSHA) sets regulations for permissible noise exposure, which highlights that the risk escalates sharply above 90 dBA and can lead to instantaneous hearing damage at extremely high levels, such as 104 dBA.

In environments where noise consistently exceeds this threshold, additional protective measures, such as hearing protection devices and engineering controls, are typically required to mitigate the risks associated with prolonged exposure. Understanding these levels helps in creating safer work environments where noise management strategies can be implemented effectively.