What is considered a hazardous noise level in decibels (dB)?

A hazardous noise level is defined as exposure to noise that can potentially cause hearing damage or loss. When discussing decibel levels, it is acknowledged that sounds at or above 85 dB are particularly concerning. Prolonged exposure to noise levels at or above this threshold can lead to irreversible hearing damage.

In many guidelines and regulations, including those from organizations like the Occupational Safety and Health Administration (OSHA), an 85 dB level is recognized as a key point for implementing hearing conservation measures in the workplace. This is because the risk of hearing loss increases significantly with exposure duration when levels reach this point.

In contrast, while sounds above 70 dB and 75 dB can lead to discomfort or potential issues with communication, they are generally not classified as hazardous with the same urgency as sounds at or above 85 dB. Levels of 90 dB and above also represent a risk, but the stricter criteria for immediate action in hearing conservation programs start at the 85 dB mark. Thus, the understanding of hazardous noise fundamentally relies on the 85 dB threshold.