- 声学楼论坛 (http://www.nju520.com/bbs/index.asp)
-- 各类扬声器设计室 (http://www.nju520.com/bbs/list.asp?boardid=30)
---- 大家来看看这两个 (http://www.nju520.com/bbs/dispbbs.asp?boardid=30&id=3003)
-- 发布时间：2006-10-16 19:37:40
-- 大家来看看这两个
| 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 |
-- 发布时间：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
-- 发布时间：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）
-- 发布时间：2006-10-18 8:13:45
--
下面那个是你做的吧!?
继续努力!
-- 发布时间：2006-10-18 17:43:41
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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
-- 发布时间：2006-10-19 9:36:33
--
以后 去上课吧
-- 发布时间：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 |
-- 发布时间：2006-11-6 15:37:36
--
这是用什么软件测的，参数很详细。
-- 发布时间：2006-11-6 17:26:49
--
Klippel
-- 发布时间：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。