85 decibels is the maximum recommended exposure limit for human hearing. It is a loud noise level comparable to that of heavy traffic or a snowblower. 85 decibels is considered to be the maximum level of noise we should expose ourselves to for longer than 8 hours at a time.

The National Institute for Occupational Safety and Health (NIOSH) has recommended that all worker exposures to noise should be controlled below a level equivalent to 85 dBA for eight hours to minimize occupational noise induced hearing loss. NIOSH has found that significant noise-induced hearing loss occurs at the exposure levels equivalent to ...

2024年2月28日 · We know now 85 dB is a relatively high noise level. It can become dangerous to your ears and, in the worst cases, can even cause hearing loss. But the question is: How can you identify an 85 dB noise? And how can you determine when to stop listening to a noise? Here is what 85 dB sounds like when compared to other noise levels: 50 Decibels

2024年8月22日 · The NIOSH REL for noise is 85 decibels. This was arrived at using the A-weighting frequency response (in dBA) over an 8-hour average or Time-Weighted Average (TWA). Any exposure to noise at or above this level is considered hazardous.

2024年2月16日 · The NIOSH recommended exposure limit (REL) for occupational noise exposure is 85 A-weighted decibels (dBA) over an eight-hour shift. If workers are repeatedly exposed to noise at or above the REL, employers must provide a hearing loss prevention program.

大多数国家将听力保护标准定为90dB，它能够保护80%的人；有些国家定为85dB，它能够使90%的人得到保护；只有在80dB的条件下，才能保护100%的人不致耳聋，我国制订的听力保护标准规定现有企业为90dB，新建、改建企业要求达到85dB（《工业企业噪声卫生标准》）。 由于城市噪声的70%来源于交通噪声，如果车辆噪声得到控制，则城市噪声就能大大降低。 为此，我国制订的相应的机动车辆 噪声控制标准，强制性控制车辆生产过程中的噪声把关。 噪声环境复杂 …

2024年11月6日 · Sound levels are most commonly measured in decibels (dB), which range from barely audible to loud enough to cause physical pain. The risk of hearing loss starts at around 70 dB. Exposure to sounds at 85-decibel levels and above damages your hearing. A normal conversation registers at around 60 decibels.

If we need to shout at a friend who is an arm’s length away, or we can hear music coming out of another person’s headphones, the volume is at least 85 dB, which is the maximum “safe level” for workplace noise exposure over the course of an eight-hour day.

2025年2月27日 · 85 decibels (dB) is a measurement that quantifies sound intensity. In practical terms, it’s equivalent to the noise level of heavy traffic, a loud vacuum cleaner, or an alarm clock from close range.

2022年9月26日 · A计权 (A-Weighted) 是一种用于音频测量的标准权重曲线，用于反映人耳的响应特性。声压电平源于A计权，用dbA表示，或称为A计权dB电平。A计权是广泛采用的噪声的单值评价指标，可以通过声级计测量得到。