英语翻译Decibels,abbreviated dB,are a logarithmic unit for expressing sound power and sound pressure levels.A-weighting this unit,referred to asdBA,adjusts the low and high frequency levels to more closely approximate the human ear’s response t

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英语翻译Decibels,abbreviated dB,are a logarithmic unit for expressing sound power and sound pressure levels.A-weighting this unit,referred to asdBA,adjusts the low and high frequency levels to more closely approximate the human ear’s response t

英语翻译Decibels,abbreviated dB,are a logarithmic unit for expressing sound power and sound pressure levels.A-weighting this unit,referred to asdBA,adjusts the low and high frequency levels to more closely approximate the human ear’s response t
英语翻译
Decibels,abbreviated dB,are a logarithmic unit for expressing sound power and sound pressure levels.A-weighting this unit,referred to as
dBA,adjusts the low and high frequency levels to more closely approximate the human ear’s response to noise.This scale is based on a child’s
hearing.
To convert dB to dBA,simply subtract the following corrections for each frequency using the following table:

英语翻译Decibels,abbreviated dB,are a logarithmic unit for expressing sound power and sound pressure levels.A-weighting this unit,referred to asdBA,adjusts the low and high frequency levels to more closely approximate the human ear’s response t
A是指计权网络A,计权网络总共分A、B、C个等级,通常用的是A,也就是说,在A计权网络下测得的声音的分贝
翻译：分贝,缩写为dB,是表示声音强度和声压的对数单位,A计权这个单位,简写为dBA,用来调整低频段和高频段的声音,使之与人耳的听觉特性较接近.这个评判标准是基于一个小孩子的听力来定的.
要将 dB转化为dBA,只需要根据下表减去修正值就可以了

英语翻译Decibels,abbreviated dB,are a logarithmic unit for expressing sound power and sound pressure levels.A-weighting this unit,referred to asdBA,adjusts the low and high frequency levels to more closely approximate the human ear’s response t MAtlab的一段程序希望有人解答.help cheby1CHEBY1 Chebyshev Type I digital and analogfilter design.[B,A] = CHEBY1(N,R,Wp) designs an Nth order lowpass digital Chebyshevfilter with R decibels of peak-to-peak ripple in the passband.CHEBY1return 英语阅读.高手帮忙连接（3-1）文章：51.For them,noise was merely a disturbance.A.only B.only … and nothing else C.not D.not only52.…that roar day and night up to 90 or 100 decibels.A.as loud as B.louder than C.higher than D.go up53.I Scientists who study___noise say that____average noise level in New York is 72.5 decibels(分贝）A./;the B./;an C.the;an D.the;the我老是搞不清是an average of还是the average of还是什么的?把有关average的主要词组告诉我,要准 英语翻译 英语翻译 英语翻译 英语翻译 英语翻译 英语翻译 英语翻译 英语翻译 英语翻译 英语翻译 英语翻译 英语翻译 英语翻译 英语翻译