A unit used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten times the common logarithm of the ratio of the two levels. [deci-+bel.] American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016...
题目If you pass along this handout,we can take a look at the decibel level of some common campus sounds.Notice how loud those horns are that people take to football games.全句.If you pass along this handout什么意思One decibel is the lowest sound that the average person can hear.Sounds ...
a noise level chart showing examples of sounds with db levels ranging from 0 to 120 decibels is given below. decibel sound source 10 almost inaudible normal breathing 20 audible rustling leaves, mosquitoes 30 very quiet whisper 40 quiet stream, refrigerator humming 50 limited sound quiet office ...
While certain sounds may help protect us, others may prove to be damaging. To help measure the different levels of sound and deem which ones are safe and harmful, experts use anonlinear scale to describe the intensity of sound wavesconveniently. This scale is known as the decibel scale and ...
Too noisy! (decibel levels of everyday sounds)(Ask Dr. Cory)SerVaas, Cory
Noise, or sound power, is measured in decibels and is an effective way of gauging the noise introduced by home appliances in relation to other common residential sounds. FromPopular-Science The decibel levels fell a fraction, but we were still in the heart of a crowd that believed in Brazil...
A decibel chart shows the intensity levels of common environmental sounds, which range from 0 dB to 140 dB (the threshold of pain). Some points of reference on the decibel chart include the following: 0 dB - The softest sound a person can hear with normal hearing 10 dB - Normal breathi...
For example, the risk of high- frequency hearing loss is three times greater among children whose mothers were exposed to noise levels between 85 and 95 decibels—levels quite common for many rock concerts and discotheques. 例如,当母亲在噪音达85至95分贝的环境——许多摇滚音乐会和迪斯可也达到这...
a unit for expressing the ratio of the magnitudes of two electric voltages or currents or analogous acoustic quantities equal to 20 times the common logarithm of the voltage or current ratio 2 : a unit for expressing the relative intensity of sounds on a scale from zero for the average least...
dB(Z) levels are typically 10 decibels or more higher than dB(A) so people are always getting the wrong readings, unless they purchase the A-weighted portion. No explanation is provided, it's truly a disservice to people who think they're getting a good reading of their noise envi...