Rss & SiteMap

声学楼论坛 http://www.nju520.com/bbs/

声学楼论坛是使用量最多、覆盖面最广的免费技术论坛,也是国内知名的声学技术讨论站点,希望我们辛苦的努力可以为您带来很多方便
共12 条记录, 每页显示 20 条, 页签: [1]
[浏览完整版]

标题:动圈式扬声器和话筒的曲线趋势调整方法

1楼
Acoustics 发表于:2009-12-3 17:07:03
看两个有意义的图.
2楼
Acoustics 发表于:2009-12-3 17:08:10

图片点击可在新窗口打开查看此主题相关图片如下:loudspeakers.jpg
图片点击可在新窗口打开查看

3楼
Acoustics 发表于:2009-12-3 17:08:48

图片点击可在新窗口打开查看此主题相关图片如下:microphone.jpg
图片点击可在新窗口打开查看
4楼
Acoustics 发表于:2009-12-3 17:27:05

The mechanic tuning of the loudspeaker usually shifts the main resonance

to the low end of the transmitted frequency range. Spherical waves are predominately

emitted in this frequency range, and, below a limiting frequency

ω', the real part of the radiation impedance, Zrad, increases proportional

to ω^2.

[此贴子已经被作者于2009-12-03 17:29:19编辑过]
5楼
Acoustics 发表于:2009-12-3 17:28:42

Tuning the mechanic resonance to lower frequencies extends the range. The

acceleration, a, of the membrane should be constant to keep the radiated

power independent of frequency since |v^2| ~ 1/ω^2 means |a| = ω|v| = const.

6楼
Acoustics 发表于:2009-12-3 17:31:42

Electric equalization using the techniques discussed here can overcome

the mechanic deficiencies of the loudspeaker, but be aware that very large

mechanic forces may be needed, reducing the power efficiency. Monitoring the

movement of the membrane with sensors and controlling the driving force

accordingly is called motional feedback and has been successful at reducing

distortions – particularly at the lower end of the frequency range.

7楼
Acoustics 发表于:2009-12-3 17:39:46

图片点击可在新窗口打开查看此主题相关图片如下:microphone.jpg
图片点击可在新窗口打开查看
8楼
Acoustics 发表于:2009-12-3 17:42:29

图片点击可在新窗口打开查看此主题相关图片如下:microphone with steerable directional.jpg
图片点击可在新窗口打开查看

9楼
Acoustics 发表于:2009-12-3 17:43:26
可调指向性因子麦克风
10楼
Acoustics 发表于:2009-12-3 17:45:39

图片点击可在新窗口打开查看此主题相关图片如下:electret microphone.jpg
图片点击可在新窗口打开查看
11楼
Acoustics 发表于:2009-12-3 17:49:49

图片点击可在新窗口打开查看此主题相关图片如下:electromagnet with a movable armature.jpg
图片点击可在新窗口打开查看
12楼
Acoustics 发表于:2009-12-3 18:08:29
公式和理论推导,就不贴了.

动铁的计算和仿真都是可行的.
共12 条记录, 每页显示 20 条, 页签: [1]

Copyright © 2005-2025 nju520.com
Powered By Dvbbs Version 8.3.0
Processed in .06152 s, 2 queries.