Sound is measured in decibels. There are many sounds in the environment, from rustling leaves (20 to 30 decibels) to a thunderclap (120 decibels) to the wail of a siren (120 to 140 decibels). Sounds that reach 85 decibels or higher can harm a person’s ears. Sound sources that exceed...
a noise level of 50 decibels in a neighborhood means that 50 percent of the time noise in this neighborhood is louder than 50 decibels. Noise is measured logarithmically, so a 3-decibel increase is a doubling of the sound energy.
a我有一个梦想,就是她能回到我身边,和我在一起天长地久 I have a dream, is she can return to side me, with me in together for ever and ever [translate] a专刊广告销售部 Memoir advertisement sales outlet [translate] aAs presented in the Definition chapter, noise is measured (with the help ...
Aggregated over the assessments made every year, the cost of noise was measured in billions—an unacceptable number even for a large global firm. 哪怕将噪声减少几个百分点,都意味着减少几千万美元的损失。值得注意的是,在发生损失前,组织完全忽略了稳定性的问题。 The value of reducing noise even by ...
a白送 Giving in vain [translate] a他母亲去年离家至今都没有消息 正在翻译,请等待... [translate] aDecibels(分贝)measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one ...
as well as other psychological problems.However, psychologists distinguish between“sound”and“noise”.“Sound”is measured physically in decibels(分贝).“Noise”cannot be measured in the same way because it refers to the psychological effect of sound and its level of“intensity(强度)”depends on ...
loud noise,strange noise,terrible noise,constant noise,slight noise 权威英汉双解 英汉 英英 网络释义 noise 显示所有例句 n. 1. [c][u] 声音;响声;噪音;吵闹声a sound, especially when it is loud, unpleasant or disturbing 2. [u] 噪声;干扰;电子干扰信号extra electrical or electronic signals that ...
It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves. Decibels(分贝)measured in water are different from ...
Objective To measure and assess personal no ise exposure features and levels in punching and cutting workers in the same workshop. Methods Sou nd pressure level (L Aeq·1 min ) was measured with sound level meter at ear height working position and eight-hour weighted sound pressure level (L...
A noise monitoring system, a noise monitoring method and a computer readable medium on which a noise monitoring program are provided to set up database compiling measured noise information easily as a noise data management part directly receives noise data and stores and manages noise data. One or...