共11 条记录, 每页显示 10 条, 页签: [1] [2]

标题：大家来看看这两个

1楼

wsf912 发表于：2006-10-16 19:37:40

样品尺寸复合盆直径155mm
Name	Value	Unit	Comment
Electrical Parameters
Re	6.89	Ohm	electrical voice coil resistance at DC
Le	1.100	mH	frequency independent part of voice coil inductance
L2	1.469	mH	para-inductance of voice coil
R2	5.59	Ohm	electrical resistance due to eddy current losses
Cmes	252.20	µF	electrical capacitance representing moving mass
Lces	64.74	mH	electrical inductance representing driver compliance
Res	45.14	Ohm	resistance due to mechanical losses
fs	39.4	Hz	driver resonance frequency

Mechanical Parameters
(using laser)
Mms	16.381	g	mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd)	15.54	g	mechanical mass of voice coil and diaphragm without air load
Rms	1.439	kg/s	mechanical resistance of total-driver losses
Cms	1.00	mm/N	mechanical compliance of driver suspension
Kms	1.00	N/mm	mechanical stiffness of driver suspension
Bl	8.06	N/A	force factor (Bl product)
Lambda s	0.066		suspension creep factor

Loss factors
Qtp	0.37		total Q-factor considering all losses
Qms	2.82		mechanical Q-factor of driver in free air considering Rms only
Qes	0.43		electrical Q-factor of driver in free air considering Re only
Qts	0.37		total Q-factor considering Re and Rms only

Vas	24.0958	l	equivalent air volume of suspension
n0	0.329	%	reference efficiency (2 pi-radiation using Re)
Lm	87.37	dB	characteristic sound pressure level

rmse Z	3.76	%	root-mean-square fitting error of driver impedance Z(f)
rmse Hx	2.30	%	root-mean-square fitting error of transfer function Hx (f)

Series resistor	0.00	Ohm	resistance of series resistor
Sd	130.70	cm	diaphragm area

我做的


Name	Value	Unit	Comment
Electrical Parameters
Re	7.16	Ohm	electrical voice coil resistance at DC
Le	0.651	mH	frequency independent part of voice coil inductance
L2	0.671	mH	para-inductance of voice coil
R2	1.97	Ohm	electrical resistance due to eddy current losses
Cmes	304.85	µF	electrical capacitance representing moving mass
Lces	40.11	mH	electrical inductance representing driver compliance
Res	65.56	Ohm	resistance due to mechanical losses
fs	45.5	Hz	driver resonance frequency

Mechanical Parameters
(using laser)
Mms	13.855	g	mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd)	12.774	g	mechanical mass of voice coil and diaphragm without air load
Rms	0.693	kg/s	mechanical resistance of total-driver losses
Cms	0.882	mm/N	mechanical compliance of driver suspension
Kms	1.13	N/mm	mechanical stiffness of driver suspension
Bl	6.74	N/A	force factor (Bl product)
Lambda s	0.053		suspension creep factor

Loss factors
Qtp	0.564		total Q-factor considering all losses
Qms	5.716		mechanical Q-factor of driver in free air considering Rms only
Qes	0.624		electrical Q-factor of driver in free air considering Re only
Qts	0.562		total Q-factor considering Re and Rms only

Vas	29.5954	l	equivalent air volume of suspension
n0	0.430	%	reference efficiency (2 pi-radiation using Re)
Lm	88.54	dB	characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom	89.02	dB	nominal sensitivity (SPL at 1m for 1W @ Zn)

rmse Z	2.43	%	root-mean-square fitting error of driver impedance Z(f)
rmse Hx	1.75	%	root-mean-square fitting error of transfer function Hx (f)

Series resistor	0.00	Ohm	resistance of series resistor
Sd	153.94	cm	diaphragm area

HiFi扬声器，请大家比较一下，给点建议吧，多谢了。

2楼

87725232 发表于：2006-10-17 13:48:50

客人的Sd 130.70，你的是153.94

口径都比他的大，Fs 比他还高，Bl还比他低那么多？

而且你的质量比他轻，阻尼还比他的小，顺性又不如他

唯独就效率还行，BL比他小，Q值也就比他的大。这值保证的也还行

不觉得你的有多好

3楼

wsf912 发表于：2006-10-18 7:57:29

我刚入行不久，该如何改，给点建议吧，以让和我一样的新人能共同进步，多谢了（下次我把曲线什么贴上来大家看看）

4楼

spk888 发表于：2006-10-18 8:13:45

下面那个是你做的吧!?

继续努力!

5楼

wsf912 发表于：2006-10-18 17:43:41

这是我入行后的第二个产品(第一个也在进行当中），从消声室测试情况来看，f0=40Hz（样品），我的44Hz；灵敏度 84.2dB（样品），我的89.2dB，灵敏度这么高是好事还是坏事？

另外我有个问题请教一下：为什么HiFi扬声器要求Qts在0.3-0.7之间？是不是越低越好？Qts对低音的音质有什么影响？

希望哪位DX能帮忙解答一下？先谢了

6楼

hualong 发表于：2006-10-19 9:36:33

以后去上课吧

7楼

wsf912 发表于：2006-11-5 13:01:45


Name	Value	Unit	Comment
Electrical Parameters
Re	6.94	Ohm	electrical voice coil resistance at DC
Le	0.708	mH	frequency independent part of voice coil inductance
L2	0.546	mH	para-inductance of voice coil
R2	1.53	Ohm	electrical resistance due to eddy current losses
Cmes	266.95	µF	electrical capacitance representing moving mass
Lces	70.44	mH	electrical inductance representing driver compliance
Res	91.38	Ohm	resistance due to mechanical losses
fs	36.7	Hz	driver resonance frequency

Mechanical Parameters
(using laser)
Mms	11.256	g	mechanical mass of driver diaphragm assembly including air load and voice coil
Mmd (Sd)	10.371	g	mechanical mass of voice coil and diaphragm without air load
Rms	0.461	kg/s	mechanical resistance of total-driver losses
Cms	1.670	mm/N	mechanical compliance of driver suspension
Kms	0.60	N/mm	mechanical stiffness of driver suspension
Bl	6.49	N/A	force factor (Bl product)
Lambda s	0.039		suspension creep factor

Loss factors
Qtp	0.398		total Q-factor considering all losses
Qms	5.626		mechanical Q-factor of driver in free air considering Rms only
Qes	0.427		electrical Q-factor of driver in free air considering Re only
Qts	0.397		total Q-factor considering Re and Rms only

Vas	42.9442	l	equivalent air volume of suspension
n0	0.478	%	reference efficiency (2 pi-radiation using Re)
Lm	88.99	dB	characteristic sound pressure level (SPL at 1m for 1W @ Re)
Lnom	89.61	dB	nominal sensitivity (SPL at 1m for 1W @ Zn)

rmse Z	5.49	%	root-mean-square fitting error of driver impedance Z(f)
rmse Hx	2.17	%	root-mean-square fitting error of transfer function Hx (f)

Series resistor	0.00	Ohm	resistance of series resistor
Sd	134.78	cm	diaphragm area

第二次改进后的结果,给点意见吧?

8楼

gxz797 发表于：2006-11-6 15:37:36

这是用什么软件测的，参数很详细。

9楼

wsf912 发表于：2006-11-6 17:26:49

Klippel

10楼

卜凡发表于：2006-11-7 12:08:27

比一班的軟件要多出好幾個參數喲，夠詳細的。

共11 条记录, 每页显示 10 条, 页签: [1] [2]