测试了喇叭的Parameters 但有许多参数含糊不清 请高人指点 谢谢
弄到对13cm的两分频的喇叭 woofer是防弹布材料的今天用专用设备和软件测试了woofer的Parameters数据
有些看得明白但有很多参数不是很确定什么含义 以下附上部分数据
请高人讲下各个参数所代表的意思吧
注:(两只单元都测了以下贴附的部分参数是自己手算的两个单元的平均值)
General Report
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Name Value Unit Comment
Electrical Parameters
Re 3.00 Ohm IMORTED electrical voice coil resistance at DC
Le 0.360 mH frequency independent part of voice coil inductance
L2 0.605 mH para-inductance of voice coil
R2 1.155 Ohm electrical resistance due to eddy current losses
Cmes 584.45 uF electrical capacitance representing moving mass
Lces 5.69 mH electrical inductance representing driver compliance
Res 17.41 Ohm resistance due to mechanical losses
fs 87.35 Hz driver resonance frequency
Mechanical Parameters
(using laser)
Mms 11.833 g mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd) 11.37 g mechanical mass of voice coil and diaphragm without air load
Rms 1.166 kg/s mechanical resistance of total-driver losses
Cms 0.28 mm/N mechanical compliance of driver suspension
Kms 3.57 N/mm mechanical stiffness of driver suspension
Bl 4.50 N/A force factor (Bl product)
Lambda s 0.041 suspension creep factor
Loss factors
Qtp 0.84 total Q-factor considering all losses
Qms 5.59 mechanical Q-factor of driver in free air considering Rms only
Qes 0.96 electrical Q-factor of driver in free air considering Re only
Qts 0.82 total Q-factor considering Re and Rms only
Vas 3.1090 l equivalent air volume of suspension
n0 0.26 % reference efficiency (2 pi-radiation using Re)
Lm 85.32 dB characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom 85.89 dB nominal sensitivity (SPL at 1m for 1W @ Zn)
rmse Z 13.64 % root-mean-square fitting error of driver impedance Z(f)
rmse Hx 3.14 % root-mean-square fitting error of transfer function Hx (f)
Series resistor 0.00 Ohm resistance of series resistor
Sd 88.25 平方厘米 diaphragm area
Name Value Unit Comment
HINT : Increase Fmax to 20* fs to improve impedance fitting
U pp 13.31 V peak to peak value of voltage at terminals
U ac 1.95 V rms AC part of voltage signal
U dc 0.00 V
U head 31.3 dB digital headroom of voltage signal
U SNR+D 49.5 dB ratio of signal to noise+distortion in voltage signal
fu noise 26.7 Hz frequency of noise+distortion maximum in voltage signal
I pp 3.07 A peak to peak value of current at terminals
I ac 0.45 A rms AC part of current signal
I dc -0.00 A
I head 31.3 dB digital headroom of current signal
I SNR+D 8.0 dB ratio of signal to noise+distortion in current signal
fi noise 93.0 Hz frequency of noise+distortion maximum in current signal
X pp 3.81 mm peak to peak value of displacement signal
X ac 0.62 mm rms AC part of displacement signal
X dc 0.04 mm
X head 34.0 dB digital headroom of displacement signal
fx cutoff Hz frequency of highest valid line in displacement signal
p pp 0.03 mV peak to peak value of microphone signal
p ac 0.00 mV rms AC part of microphone signal
p head 106.2 dB digital headroom of microphone signal
p SNR+D -37.4 dB ratio of signal to noise+distortion in microphone signal
fp noise 269.2 Hz frequency of noise+distortion maximum in microphone signal
f sample 6000 Hz sample frequency
N stim 16384 number of samples stimulus length
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另外请教 这对喇叭是不是做闭箱比较合适呀?看Q0比较高的说 高手给写建议
想自己动手做对箱子 期待~~~~~~~~~ 知道的朋友请进来解惑先谢过了! 这是什么测试系统？K开头那个？
喇叭你煲过没有？测试时温度多少？看参数这个喇叭适合做开口箱，勉强可以做密闭箱
只是对于这个单元来讲，你要做二分频，当低音用，但是此单元FS较高而CMS太小（所以开始怀疑是温度或者未煲开的缘故），低频下潜欠奉，自己考虑吧。个人建议你最少要找一个FS〈50Hz的130MM单元做低音 原帖由 1999 于 2009-1-16 13:57 发表 http://bbs.hifidiy.net/images/common/back.gif
这是什么测试系统？K开头那个？
喇叭你煲过没有？测试时温度多少？看参数这个喇叭适合做开口箱，勉强可以做密闭箱
只是对于这个单元来讲，你要做二分频，当低音用，但是此单元FS较高而CMS太小（所以开始怀疑是 ...
呵呵没办法目前准备先用这对单元练练手
没煲过煲了以后估计f0能下降6到10Hz的样子吧 测试温度就室温好象开了空调估计20度左右自由空气中测试的
测试系统我一下想不起来了记忆当中好象是DB什么什么的 也不晓得记错了没 大家给我点建议上面那些参数都是什么意思呢想学习一下
谢谢 其实,都写在后面,还挺具体的.
比如第一项:
Re 3.00 Ohm IMPORTED electrical voice coil resistance at DC
就是,Re3.00 欧姆 重要的电音圈直流阻抗
第二项
Le 0.360 mH frequency independent part of voice coil inductance
Le0.36mH 频率无关的音圈电感
如果还需要了解这些参数的具体意义,只能找一些书来看并上网搜索了. 哦我只晓得几个主要参数什么意思
许多都不清楚特别是比较相近的几个呵呵
谢谢o版 原帖由 okra 于 2009-1-16 22:15 发表 http://bbs.hifidiy.net/images/common/back.gif
其实,都写在后面,还挺具体的.
比如第一项:
Re 3.00 Ohm IMPORTED electrical voice coil resistance at DC
就是,Re3.00 欧姆 重要的电音圈直流阻抗
第二项 ...
那这对喇叭适合做什么箱子呢?q高了点
想自己动手做对书架玩玩给点建议吧嘿嘿 大家进来交流交流~~~
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