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用REW做电声测量的实践教程,TI的翻译版,加麦克风的选择
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2021-02-17
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看了10几个REW视频觉得有点绕,找了这篇文章看,顺便翻译一下,看它就可以入手了。 基于国外网站麦克风测试的结果,加了我的一些说明,稍好的电容麦克都可以用,例如WM-61/62,就是噪声高点,但是200美元以内的校准麦克噪声也不低。
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Application Report
SLAA641–August 2014
Audio Characterization Primer
Tyler Pate ..................................................................................... Chinomango
翻译
©
Copyright © 2014, Texas Instruments Incorporated, https://www.ti.com/lit/an/slaa641/slaa641.pdf
摘要
在扬声器系统上执行频率响应特性分析,需要将测量技术的非线性最小化,以实现精确的测量。 本文讨论了最小化
测量误差的方法,以捕获表示系统性能的准确表现。基于准确的测量,可以将均衡滤波器应用于系统以获得所需的响
应。
目录
1 简介................................................. ................................................... ........ ................................................... ........ ............................. 2
2 理想的音频测量环境............................................. ...................................... ................................................... ........ ....................... 2
3 错误的来源.............................................. ..................... ................................................... ........ ......................................................... 2
4 需要的设备.............................................. ................................. ................................................... ........ ..............................................2
5 结合近场和远场测量................................................. ........... ................................................... ........ ............................................. 3
6 模拟消声测量.............................................. ......................... ................................................... ........ ................................................ 3
6.1 近场测量............................................. .......................... ................................................... ........................... ..................................... 3
6.2 远场测量............................................. ..................... ................................................... ........ ............................................................. 3
6.3 反射和梳状滤波... ................................................ ................................................... ........ ......................................... ................. .. 3
6.4 最佳扬声器放置位置................................. ........... ................................................... ........ ............................................................ 3
6.5 开窗................................................. .......................... ................................................... ........ ................................................... ......... 4
6.6 调整脉冲响应窗口............................... ............ ................................................... ........ ............................................ ................. .. 4
6.7 合并测量.................................. ........................... ................................................... ........ ..................................................... ............ 5
7 频率响应测量演练............................................. . ................................................... ........ ..................................................... ...........5
7.1 设备................................................ ........................... ................................................... ........ ..................................................... ....... 5
7.2 程序............................................................ ................ ................................................... ........ ........................................... ..... .......... 5
8 参考资料... ................................................... ... ................................................... ........ .......................................... ................. ....... 6
9.
译者附加的 REW 内容................................................... ... ................................................... ........ .......................................... ...... 6
插图列表
1 近场麦克风放置示例....................................... .................... ................................................... ........ ........................................ ..... 3
2 远场麦克风放置示例....................................... .................... ................................................... ........ ........................................... .. 3
3 无红外窗口的梳波.................................................... ......... ................................................... ........ ................................................. 4
4 脉冲响应.............................................. ........................................ ................................................... ........ ............................... .......... 4
5 红外窗口和频率响应-8毫秒窗口....................................... ................................................... ........ ..................................... ....... 4
6 IR窗口和频率响应-2.5 ms窗口....................................... ................................................... ........ ................................................. 4
7 近场频率响应........................................... ....................... ................................................... ........ ....................................... ............. 5
8 远场频率响应.............................................. ..................... ................................................... ........ .................................................... 5
9 近场和远场频率响应,合并对话.................................. ................................................... ........ ................................................. 5
10 合并频率响应.............................................. ............................. ................................................... ........ ............................................ 5
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