70 decibels is as loud as a washing machine or a dishwasher. It is a moderate noise level. 70 dB noise is not considered harmful to human hearing. However, extended exposure to levels …

2024年3月11日 · Any sounds above 70 dB can cause hearing damage after prolonged exposure. If you are unsure what 70 dB sounds like, various common sounds are attached to each …

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 。

70分贝：10英尺（约3米）外的真空吸尘器； 美国环保署 认定的人类能忍受（不产生听力损失、睡眠障碍、焦虑、学习障碍等）的最大噪音. 85分贝：长期作用下会引起听力损伤. 90分贝：10 …

2024年8月22日 · Any noise that is louder than 70 decibels is deemed disturbing. Residential noise regulations are normally set at 60 or 55 decibels (the equivalent noise of a regular vacuum …

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” 。

2024年11月22日 · A sound level of 70 decibels is louder than a typical conversation, which usually ranges between 60 to 65 dB, but quieter than a lawnmower, which can reach up to 90 …

17 小时之前 · Sounds at 70 dB or lower generally pose little to no risk, while sounds at 85 dB can be damaging if exposure lasts for eight hours or more. The risk increases as the sound level …

17 小时之前 · 70 dB is a measurement of sound intensity on the decibel scale, which is logarithmic. This means that an increase of just a few decibels signifies a significant increase …

2024年8月28日 · 70 dB. The sound is loud when the level hits 70 dB. These are places where there is a lot of noise or traffic. This could be a hair dryer or a restaurant with lots of people. 80 …