英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
decibels查看　decibels　在百度字典中的解释百度英翻中〔查看〕
decibels查看　decibels　在Google字典中的解释Google英翻中〔查看〕
decibels查看　decibels　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Decibel | Definition, Scale Examples | Study. com
    Since decibels are a logarithmic scale rather than linear, the 90 dB sound is 10 times as intense as the 80 dB sound It is only a difference of 10 dB, but the intensity is many times higher than
  • Measuring Decibels | Devices, Logarithm Sound Scale
    Sound intensity level, measured in units of decibels, is a logarithmic value that is calculated by comparing the intensity of a sound to a reference intensity of 1x10-12 W m 2, which is the lower
  • Solved What is the gain of 27 in decibels? Keep three - Chegg. com
    Answer to What is the gain of 27 in decibels? Keep three Your solution’s ready to go! Our expert help has broken down your problem into an easy-to-learn solution you can count on
  • Solved (a) what is the sound intensity level β, in decibels . . . - Chegg
    The number of decibels increases by 10 for a factor of 10 increase in intensity The general formula for the sound intensity level, in decibels, corresponding to intensity I is B = 10 log(1) dB where Io is a reference intensity For sound waves, Io is taken to W m² Note that log refers to the logarithm to the base 10
  • Solved 21. A certain op-amp has a CMRR of 250,000 . Convert - Chegg
    21 A certain op-amp has a CMRR of 250,000 Convert this to decibels 22 The open-loop gain of a certain op-amp is 175,000 Its common-mode gain is 0 18 Determine the CMRR in decibels 23 An op-amp datasheet specifies a CMRR of 300,000 and an Ao1 of 90,000 What is the common-mode gain?24 Determine the bias current, IBIAS, given that the
  • Quiz Worksheet - Measuring Decibels | Study. com
    About This Quiz Worksheet This quiz worksheet is designed to assess your understanding of measuring decibels For the quiz, you'll need to know about certain topics like sounds that can cause
  • Solved The loudness L, in decibels (dB), of a sound - Chegg
    The loudness L, in decibels (dB), of a sound is given by L=10•logII0 , where I is the intensity of the sound in watts per square meter W m2 , and I0=10−12 W m2 The intensity of sound generated by a large swarm of insects can reach 10−3 3 W m2
  • Solved The formula for measuring sound intensity in decibels - Chegg
    Question: The formula for measuring sound intensity in decibels D is defined by the equation D=10log(I0I), where I is the intensity of the sound in watts per square meter and I0=10−12 is the lowest level of sound that the average person can hear
  • Solved 1 Determine the power gain in decibels for an antenna - Chegg
    Question: 1 Determine the power gain in decibels for an antenna with directive gain D = 40 dB and efficiency n = 65 2 Determine the power gain for an antenna with radiation resistance of 18 812, effective resistance of 0 422 and directive gain of 200 3 Determine the directive gain at decibels for an antenna having a power gain of 48 75 dB and an efficiency of 75%
  • Solved The general formula for the number of decibels | Chegg. com
    The general formula for the number of decibels corresponding to a change in sound intensity to I_2 relative to the former intensity I_1 is beta_2 - beta_1 = delta beta = 10 log_10(I_2 I_1) dB Delta beta = 20log(d_1 d_2) dB If d_2 is 3 16 times as far away from the source as d_1, by how many decibels will the sound at d_2 be changed relative to





中文字典-英文字典  2005-2009