主题：扬声器等效电路分析

Ma1=Mmr/Sd²=8/3*ρ/(π²a)

Ra1=0.441ρc/(πa²)

Ra2=ρc/(πa²)

Ca1=5.94a³/(ρc²)

此主题相关图片如下：

还是从头开始看比较好!

太专业了

最好具体点，指明一下类比图上每个元件所代表的含义．

            http://users.ece.gatech.edu/~mleach/papers/vcinduc.pdf
            Loudspeaker Voice-Coil Inductance Losses: Circuit Models, Parameter Estimation, and Effect on Frequency Response

by W. Marshall Leach, Jr., Professor
Georgia Institute of Technology
School of Electrical and Computer Engineering
Atlanta, Georgia 30332-0250 USA

Download Evaluation Version of AIM-Spice

Click here to download Version 5.0 for Windows Vista/XP/2003 Server/2000/NT.

另一个仿真软件.

SwitcherCAD^TM 是一款高性能 Spice III 仿真器、电路图捕获和波形观测器，并为简化开关稳压器的仿真提供了改进和模型。

http://ltspice.linear.com/software/swcadiii.exe

SPICE is the most commonly used analog circuit simulator today and is enormously important for the electronics industry. SPICE is a general purpose analog simulator which contains models for most circuit elements and can handle complex nonlinear circuits. The simulator can calculate dc operating points, perform transient analyses, locate poles and zeros for different kinds of transfer functions, find the small signal frequency response, small signal transfer functions, small signal sensitivities, and perform Fourier, noise, and distortion analyses.

The simulator was developed at the University of California, Berkeley, and was first released in 1972. Many scientists at Berkeley and other institutions contributed to the development and improvement in subsequent versions of SPICE. In 1975, Nagel described the next major release of SPICE, called SPICE2. The core of the program still remained intact, even after many improvements and additions. These included improved device models, numerical techniques, and user interfaces. The last major release, SPICE3, came in 1985 with a conversion of the source code from FORTRAN to the C programming language. The Berkeley version of SPICE is a public domain program, but since the late 1970s a number of companies have released commercial versions of SPICE, providing further improvements in user support, in user interfaces, and, in certain cases, also in models and in simulation convergence.

AIM-Spice is a new version of SPICE running under the Microsoft Windows and Linux operating systems. AIM-Spice for Windows is capable of displaying graphically the results of a simulation in progress, a feature that allows the operator to terminate a run based on an instant information on intermediate simulation results. The development of AIM-Spice was motivated by the need of a more user friendly interface, and as a vehicle for the new set of advanced device models for circuit simulation developed by our group.

the source code from FORTRAN to the C programming language

原来SPICE的源代码是从FORTRAN语言改成C语言

我也是在南大学过,感到很深奥,当初也没怎么用心学,很对不起曹老师.如哪位详细讲解一下,别忘了通知我,谢谢了.

现在学,也不晚啊

感谢这一长贴和资料室的同一讨论，我已仿真成功。解决了不少问题。

祝贺.

有电路基础的话,扬声器等效电路及其计算就不是难题.

谢谢老师

恭喜恭喜,由於我是想要仿真耳機搭配人工耳的等效電路,並將其用於P-SPICE中,目前簡單的線路圖

已經可以畫出,但是如何求得像是調音布的電阻電感值與導音管和後部氣孔的數值選定,還是遇到了難題

不過我會持續努力,也註大各位搞工程開發的,都能突破困難,

参数	单位	A	B
Fs	Hz	899.0000	915.0000
Re	ohm	7.4000	7.4000
Qms		9.3500	5.9900
Qes		5.2400	5.5700
Qts		3.3600	2.8900
SPL0	dB/0.1m/0.1W	84.0000	83.8000
ηo	%	0.0158	0.0151
a	mm	4.6600	4.6600
Sd	mm2	68.2217	68.2217
Zmax	ohm	20.5900	15.3500
Z10K	ohm	8.2600	8.1400
L10K	mH	0.0584	0.0540
Mms	g	0.0178	0.0178
Mms	g	0.0178	0.0178
Cms	mm/s	1.7608	1.6997
Vas	mL	1.1666	1.1261
BL	T*m	0.3768	0.3687
Rms	Kg/s	0.0108	0.0171

Mas	103Kg/m4	3.8245	3.8245
Ras	106Kg/sm4	2.3105	3.6707
Cas	10-12m5/N	8.1949	7.9108
Cmes	μF	125.3600	130.9247
Res	ohm	13.2042	7.9580
Lces	mH	0.2500	0.2311
Rae	106Kg/sm4	4.1227	3.9475
Rme	Kg/s	0.0192	0.0184
Rat	106Kg/sm4	6.4332	7.6182
Rmt	Kg/s	0.0299	0.0355

微型扬声器测试前后防尘网的声阻尼特性，可以用对比测试法。事例如上。

A为没有防尘网的测试结果，B是加了防尘网的测试结果。

结果对比，可以发现一些规律：

Fs的小幅变化，SPL的些微变化，Qms的大幅变化。

力阻：0.0171-0.0108=0.063Kg/s为增加值（即为防尘网的附加阻尼）

声阻：（3.6707-2.3105）*10^6=1.3602*10⁶Kg/sm⁴为增加值（即为防尘网的附加阻尼）