8 times as loud as 70 dB. Serious damage possible in 8 hr exposure: Boeing 737 or DC-9 aircraft at one nautical mile (6080 ft) before landing (97 dB); power mower (96 dB); motorcycle at 25 ft (90 dB). Newspaper press (97 dB). 90: 4 times as loud as 70 dB. Likely damage 8 hr exp

80 decibels is a fairly loud noise level that may harm your hearing, Common everyday examples of 80 dB sounds include car traffic noise, or a hairdryer. In this article, we’re taking a closer look at how loud is 80 decibels, and examples of this noise level to understand if exposure to 80 dB is safe for our hearing or not.

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。

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.

2024年2月12日 · How Loud Is 80 Decibels (dB)? Eighty-decibel sounds are intense and long-term exposure can damage your hearing. The maximum recommended sound limit for human exposure is 70 dB in 24 hours. Even though 80 dB is a harsh sound level, minimal exposure for a few minutes is not considered dangerous.

本文详细介绍了分贝dB与放大倍数的关系，包括增益定义、电压电流和功率的dB计算，以及-3dB带宽和0dB的概念。 通过实例演示，教你理解dB在电学中的重要性和常见应用场景，如dBm、dBw的区别及其在通信和音频领域的运用。

2024年8月22日 · You have probably already seen from each decibel chart that anything over 80 dBs (more specifically 85 dBs) can cause severe problems over time. At 85 decibels, the maximum recommended exposure time is 8 hours. The fact is, extended or repeated exposure to noise of 85 decibels or above can cause permanent hearing loss, it’s as simple as that.

Sounds above 80 dB and up to 110 dB are considered very loud. The general rule is that all sound levels exceeding 85 decibels are not only very loud, but also harmful to human hearing and potentially dangerous. Specialists recommend you use hearing protection whenever you are exposed to sounds above 85 dB. Common examples of 80-110 dB sounds ...

分贝是国家选定的非国际单位制单位, 是我国法定计量单位中的级差单位，表示为db ， 其定义为:“两个同类功率量或可与功率类比的量之比值的常用对数乘以10 等于1时的级差” 。

80 地下铁、闹市繁忙交通、距离 2 英尺的闹钟、介于 85 至 115 分贝的汽艇、工厂吵杂声。 若您常接触这些噪音超过 8 小时都会对身体不利。