yuayuayu
发表于 2008-6-26 20:38
第一次做分频箱子,问题多多。学习学习。
cndb
发表于 2008-6-28 15:05
原帖由 毛磊 于 2008-6-26 12:54 发表 http://bbs.hifidiy.net/images/common/back.gif
纤维的可是使容积曾大,海绵的可是使溶剂减小
此话怎讲?
lee8992
发表于 2008-6-28 17:04
闭箱如果塞满吸音棉,尤其是结实点的,里面的空气减少,喇叭在工作的时候,空气压缩比增大,喇叭阻尼加大,自然低频出不来
放吸音棉是有前提的,必须蓬松,这样才起到增大容积的概念,放堆海绵之类的,如果在压进去,那就真叫好心做坏事了
xitonghan
发表于 2008-7-29 20:42
很明显的~
多实验吧~
fei1139
发表于 2008-9-4 22:14
新手刚来学习了,支持一下。
babyx3000
发表于 2008-9-5 02:37
大热天穿棉袄...:lol
高传真
发表于 2008-9-5 04:24
大地飞鹰
发表于 2008-9-5 13:34
来学习了,准备调试音箱了...
阿龙
发表于 2008-9-5 15:17
大枫哥哥
发表于 2008-9-5 19:59
zhuangzm
发表于 2008-9-7 20:23
吸音棉的材质不同吸音系数也不同,矿棉最好,但由于不环保,已经停止使用了。现在最好的要数玻璃纤维棉,具体用量要在调整中决定。
chx16888
发表于 2008-9-12 22:36
吸音材料占整个箱子容积的60%最佳
欧蒙泰
发表于 2008-9-13 16:20
一点经验:吸音棉(以海绵为例),一般箱体内壁2.5厘米的厚度可以作为调整作用,再多了就是有减小箱内容积的作用......
control_138
发表于 2009-5-17 00:32
:loveliness: 学习班
wengg
发表于 2009-5-17 00:49
吸声系数为一些常见的材料,石膏墙,砖墙,胶合板面板等..
Sponsored Links赞助商链接
The sound absorption coefficient indicates how much of the sound is absorbed in the actual material.该吸声系数表明多少吸收声音的实际材料。 The absorption coefficient can be expressed as:吸收系数可表示为:
α = I a / I i α = 我是/ 李 (1) ( 1 )
where 哪里
I a = sound intensity absorbed(W/m 2 ) 我是 = 声强吸收(瓦/米2 )
I i = incident sound intensity (W/m 2 ) 本人为I =事件声音强度 (瓦/米2 )
Absorption coefficient - α - for some common materials can be found in the table below:吸收系数- α -对一些常见的材料中可以找到见下表:
Material材料Sound Absorption吸声
Coefficient系数
- α - - α -
Plaster walls粉刷墙壁0.01 - 0.03 0.01 - 0.03
Unpainted brickwork Unpainted砖0.02 - 0.05 0.02 - 0.05
Painted brickwork画砖0.01 - 0.02 0.01 - 0.02
3 mm plywood panel 3毫米胶合板小组0.01 - 0.02 0.01 - 0.02
6 mm cork sheet 6毫米的软木表0.1 - 0.2 0.1 - 0.2
6 mm porous rubber sheet 6毫米多孔胶板0.1 - 0.2 0.1 - 0.2
12 mm fiberboard on battens 12毫米的纤维板板条0.3 - 0.4 0.3 - 0.4
25 mm wood wool cement on battens 25毫米的木丝水泥板条0.6 - 0.07 0.6 - 0.07
50 mm slag wool or glass silk 50毫米矿棉或玻璃丝绸0.8 - 0.9 0.8 - 0.9
12 mm acoustic belt 12毫米声学带0.5 - 0.5 0.5 - 0.5
Hardwood硬木0.3 0.3
25 mm sprayed asbestos 25毫米喷石棉0.6 - 0.7 0.6 - 0.7
100 mm mineral wool 100毫米矿棉0.65 0.65
Persons, each人,每2.0 - 5.0 2.0 - 5.0
Acoustic tiles声学瓷砖0.4 - 0.8 0.4 - 0.8
Note!注意! The absorption coefficient varies with the frequency of sound.吸收系数随频率的声音。
Total Room Sound Absorption共计室吸声
The total sound absorption in a room can be expressed as:总吸声在一个房间可以表示为:
A = S 1 α 1 + S 2 α 2 + .. 为a = 1 α 1 + 2 α 2 + .. + S n α n = ∑ S i α i (2) + 征 α 例 Σ语字母i α 一 ( 2 )
where 哪里
A = the absorption of the room (m 2 Sabine) 为a =吸收室(米2萨比娜)
S n = area of the actual surface (m 2 ) 征 =领域的实际面(米2 )
α n = absorption coefficient of the actual surface α 例 吸收系数的实际表面
Mean Absorption Coefficient平均吸收系数
The mean absorption coefficient for the room can be expressed as:平均吸声系数的房间可以表示为:
a m = A / S (3) 一支 M = A / S公司( 3 )
where 哪里
a m = mean absorption coefficient 1 米 =平均吸声系数
A = the absorption of the room (m 2 Sabine) 为a =吸收室(米2萨比娜)
S = total surface in the room (m 2 ) 秒 =总面积的房间(米2 )
A rooms acoustic characteristics can be calculated with the formulas above, or estimated for typical rooms.室声学特性可以计算公式以上,或估计为典型的客房。
wengg
发表于 2009-5-17 00:50
http://www.engineeringtoolbox.com/accoustic-sound-absorption-d_68.html
看看
还有材料在不同频段上的吸音系数是不同
wengg
发表于 2009-5-17 00:53
ABSORPTION COEFFICIENT CHART 吸收系数图
I got this chart off the web and it gives you an idea of how the different materials absorb sound at different frequencies. 我得到这个图表从网上 , 并让您了解不同的材料吸收不同频率的声音。
Remember that full absorption is 1 whilst full reflection is 0 请记住 , 充分吸收1同时充分反映为0
http://www.saecollege.de/reference_material/pages/Coefficient%20Chart.htm
看看你们所用的材料吸音系数吧
Absorption coefficients of common building materials and finishes 吸收系数共同建筑材料和完成
Floor materials 地板材料125 Hz 125赫兹250 Hz 250赫兹500 Hz 500赫兹1 kHz 1千赫2 kHz 2千赫4 kHz 4千赫
carpet 地毯0.01 0.010.02 0.020.06 0.060.15 0.150.25 0.250.45 0.45
Concrete (unpainted, rough finish) 混凝土( unpainted ,粗加工)0.01 0.010.02 0.020.04 0.040.06 0.060.08 0.080.1 0.1
Concrete (sealed or painted) 混凝土(盖章或画)0.01 0.010.01 0.010.02 0.020.02 0.020.02 0.020.02 0.02
Marble or glazed tile 大理石或釉面砖0.01 0.010.01 0.010.01 0.010.01 0.010.02 0.020.02 0.02
Vinyl tile or linoleum on concrete 乙烯基瓷砖或油布的具体0.02 0.020.03 0.030.03 0.030.03 0.030.03 0.030.02 0.02
Wood parquet on concrete 木地板的具体0.04 0.040.04 0.040.07 0.070.06 0.060.06 0.060.07 0.07
Wood flooring on joists 木地板上托梁0.15 0.150.11 0.110.1 0.10.07 0.070.06 0.060.07 0.07
Seating materials 座椅材料125 Hz 125赫兹250 Hz 250赫兹500 Hz 500赫兹1 kHz 1千赫2 kHz 2千赫4 kHz 4千赫
Benches (wooden, empty) 椅(木制,空)0.1 0.10.09 0.090.08 0.080.08 0.080.08 0.080.08 0.08
Benches (wooden, 2/3 occupied) 椅(木, 2 / 3被占领)0.37 0.370.4 0.40.47 0.470.53 0.530.56 0.560.53 0.53
Benches (wooden, fully occupied) 椅(木制,完全占领)0.5 0.50.56 0.560.66 0.660.76 0.760.8 0.80.76 0.76
Benches (cushioned seats and backs, empty) 长椅(衬垫座椅和支持,空)0.32 0.320.4 0.40.42 0.420.44 0.440.43 0.430.48 0.48
Benches (cushioned seats and backs, 2/3 occupied) 长椅(衬垫座椅和支持, 2 / 3被占领)0.44 0.440.56 0.560.65 0.650.72 0.720.72 0.720.67 0.67
Benches (cushioned seats and backs, fully occupied) 长椅(衬垫座椅和支持,充分占领)0.5 0.50.64 0.640.76 0.760.86 0.860.86 0.860.76 0.76
Theater seats (wood, empty) 剧场座位(木材,空)0.03 0.030.04 0.040.05 0.050.07 0.070.08 0.080.08 0.08
Theater seats (wood, 2/3 occupied) 剧场座位(木材, 2 / 3被占领)0.34 0.340.21 0.210.28 0.280.53 0.530.56 0.560.53 0.53
Theater seats (wood, fully occupied) 剧场座位(木材,完全占领)0.5 0.50.3 0.30.4 0.40.76 0.760.8 0.80.76 0.76
Seats (fabric-upholsterd, empty) 席(织物upholsterd ,空)0.49 0.490.66 0.660.8 0.80.88 0.880.82 0.820.7 0.7
Seats (fabric-upholsterd, fully occupied) 席(织物upholsterd ,完全占领)0.6 0.60.74 0.740.88 0.880.96 0.960.93 0.930.85 0.85
Reflective wall materials 反光墙体材料125 Hz 125赫兹250 Hz 250赫兹500 Hz 500赫兹1 kHz 1千赫2 kHz 2千赫4 kHz 4千赫
Brick (natural) 砖(天然)0.03 0.030.03 0.030.03 0.030.04 0.040.05 0.050.07 0.07
Brick (painted) 砖(画)0.01 0.010.01 0.010.02 0.020.02 0.020.02 0.020.03 0.03
Concrete block (coarse) 混凝土砌块(粗)0.36 0.360.44 0.440.31 0.310.29 0.290.39 0.390.25 0.25
Concrete block (painted) 混凝土砌块(画)0.1 0.10.05 0.050.06 0.060.07 0.070.09 0.090.08 0.08
Concrete (poured, rough finish, unpainted) 混凝土(浇,粗加工, unpainted )0.01 0.010.02 0.020.04 0.040.06 0.060.08 0.080.1 0.1
Doors (solid wood panels) 门(实木板)0.1 0.10.07 0.070.05 0.050.04 0.040.04 0.040.04 0.04
Glass (1/4" plate, large pane) 玻璃( 1 / 4 “字牌,大面板)0.18 0.180.06 0.060.04 0.040.03 0.030.02 0.020.02 0.02
Glass (small pane) 玻璃(小面板)0.04 0.040.04 0.040.03 0.030.03 0.030.02 0.020.02 0.02
Plasterboard (12mm (1/2") paneling on studs) 石膏板( 12毫米( 1 / 2 “ )镶板螺栓)0.29 0.290.1 0.10.06 0.060.05 0.050.04 0.040.04 0.04
Plaster (gypsum or lime, on masonry) 石膏(石膏或石灰,对砌体)0.01 0.010.02 0.020.02 0.020.03 0.030.04 0.040.05 0.05
Plaster (gypsum or lime, on wood lath) 石膏(石膏或石灰,木材板条)0.14 0.140.1 0.10.06 0.060.05 0.050.04 0.040.04 0.04
Plywood (3mm(1/8") paneling over 31.7mm(1-1/4") airspace) 胶合板( 3 毫米( 1 / 8 “ )镶板超过三十一点七毫米( 1-1/4 ” )的领空)0.15 0.150.25 0.250.12 0.120.08 0.080.08 0.080.08 0.08
Plywood (3mm(1/8") paneling over 57.1mm( 2-1/4") airspace) 胶合板( 3 毫米( 1 / 8 “ )镶板超过五十七点一毫米( 2-1/4 ” )的领空)0.28 0.280.2 0.20.1 0.10.1 0.10.08 0.080.08 0.08
Plywood (5mm(3/16") paneling over 50mm(2") airspace) 胶合板( 5毫米( 3 / 16 “ )超过50毫米的镶板( 2 ” )领空)0.38 0.380.24 0.240.17 0.170.1 0.10.08 0.080.05 0.05
Plywood (5mm(3/16") panel, 25mm(1") fiberglass in 50mm(2") airspace) 胶合板( 5毫米( 3 / 16 “ )面板, 25毫米( 1 ” )在50毫米的玻璃纤维( 2 “ )领空)0.42 0.420.36 0.360.19 0.190.1 0.10.08 0.080.05 0.05
Plywood (6mm(1/4") paneling, airspace, light bracing) 胶合板( 6毫米( 1 / 4 “ )镶板,领空,轻护)0.3 0.30.25 0.250.15 0.150.1 0.10.1 0.10.1 0.1
Plywood (10mm(3/8") paneling, airspace, light bracing) 胶合板( 10毫米( 3 / 8 “ )镶板,领空,轻护)0.28 0.280.22 0.220.17 0.170.09 0.090.1 0.10.11 0.11
Plywood (19mm(3/4") paneling, airspace, light bracing) 胶合板( 19毫米( 3 / 4 “ )镶板,领空,轻护)0.2 0.20.18 0.180.15 0.150.12 0.120.1 0.10.1 0.1
Absorptive wall materials 吸收墙体材料125 Hz 125赫兹250 Hz 250赫兹500 Hz 500赫兹1 kHz 1千赫2 kHz 2千赫4 kHz 4千赫
Drapery (10 oz/yd2, 340 g/m2, flat against wall) 布料( 10 oz/yd2 , 340克,持平墙)0.04 0.040.05 0.050.11 0.110.18 0.180.3 0.30.35 0.35
Drapery (14 oz/yd2, 476 g/m2, flat against wall) 布料( 14 oz/yd2 , 476克,持平墙)0.05 0.050.07 0.070.13 0.130.22 0.220.32 0.320.35 0.35
Drapery (18 oz/yd2, 612 g/m2, flat against wall) 布料( 18 oz/yd2 , 612克,持平墙)0.05 0.050.12 0.120.35 0.350.48 0.480.38 0.380.36 0.36
Drapery (14 oz/yd2, 476 g/m2, pleated 50%) 布料( 14 oz/yd2 , 476克,折叠50 % )0.07 0.070.31 0.310.49 0.490.75 0.750.7 0.70.6 0.6
Drapery (18 oz/yd2, 612 g/m2, pleated 50%) 布料( 18 oz/yd2 , 612克,折叠50 % )0.14 0.140.35 0.350.53 0.530.75 0.750.7 0.70.6 0.6
Fiberglass board (25mm(1") thick) 玻纤板( 25毫米( 1 “ )厚)
0.06 0.060.2 0.20.65 0.650.9 0.90.95 0.950.98 0.98
Fiberglass board (50mm(2") thick) 玻纤板(使用50mm ( 2 “ )厚)0.18 0.180.76 0.760.99 0.990.99 0.990.99 0.990.99 0.99
Fiberglass board (75mm(3") thick) 玻纤板( 75毫米( 3 “ )厚)0.53 0.530.99 0.990.99 0.990.99 0.990.99 0.990.99 0.99
Fiberglass board (100mm(4") thick) 玻纤板( 100毫米( 4 “ )厚)0.99 0.990.99 0.990.99 0.990.99 0.990.99 0.990.97 0.97
Open brick pattern over 75mm(3") fiberglass 打开砖格局超过75毫米( 3 “ )的玻璃纤维0.4 0.40.65 0.650.85 0.850.75 0.750.65 0.650.6 0.6
Pageboard over 25mm(1") fiberglass board Pageboard超过25毫米( 1 “ )玻纤板0.08 0.080.32 0.320.99 0.990.76 0.760.34 0.340.12 0.12
Pageboard over 50mm(2") fiberglass board Pageboard超过50毫米的( 2 “ )玻纤板0.26 0.260.97 0.970.99 0.990.66 0.660.34 0.340.14 0.14
Pageboard over 75mm(3") fiberglass board Pageboard超过75毫米( 3 “ )玻纤板0.49 0.490.99 0.990.99 0.990.69 0.690.37 0.370.15 0.15
Performated metal (13% open, over 50mm(2") fiberglass) Performated金属( 13 %开放,超过50毫米的( 2 “ )的玻璃纤维)0.25 0.250.64 0.640.99 0.990.97 0.970.88 0.880.92 0.92
Ceiling material 天花板材料125 Hz 125赫兹250 Hz 250赫兹500 Hz 500赫兹1 kHz 1千赫2 kHz 2千赫4 kHz 4千赫
Plasterboard (12mm(1/2") in suspended ceiling grid) 石膏板( 12毫米( 1 / 2 “ )在吊顶网)0.15 0.150.11 0.110.04 0.040.04 0.040.07 0.070.08 0.08
Underlay in perforated metal panels (25mm(1") batts) 背后的穿孔金属板( 25毫米( 1 “ ) batts )0.51 0.510.78 0.780.57 0.570.77 0.770.9 0.90.79 0.79
Metal deck (perforated channels,25mm(1") batts) 金属甲板(穿孔渠道, 25毫米( 1 “ ) batts )0.19 0.190.69 0.690.99 0.990.88 0.880.52 0.520.27 0.27
Metal deck (perforated channels, 75mm(3") batts) 金属甲板(穿孔渠道, 75毫米( 3 “ ) batts )0.73 0.730.99 0.990.99 0.990.89 0.890.52 0.520.31 0.31
Plaster (gypsum or lime, on masonary) 石膏(石膏或石灰,对弹簧)0.01 0.010.02 0.020.02 0.020.03 0.030.04 0.040.05 0.05
Plaster (gypsum or lime, rough finish or timber lath) 石膏(石膏或石灰,粗加工或木材板条)0.14 0.140.1 0.10.06 0.060.05 0.050.04 0.040.04 0.04
Sprayed cellulose fiber (16mm(5/8") on solid backing) 喷涂纤维素纤维( 16毫米( 5 / 8 “ )的坚实后盾)0.05 0.050.16 0.160.44 0.440.79 0.790.9 0.90.91 0.91
Sprayed cellulose fiber (25mm(1") on solid backing) 喷涂纤维素纤维( 25毫米( 1 “ )的坚定支持)0.08 0.080.29 0.290.75 0.750.98 0.980.93 0.930.76 0.76
Sprayed cellulose fiber (25mm(1") on timber lath) 喷涂纤维素纤维( 25毫米( 1 “ )对木材板条)0.47 0.470.9 0.91.1 1.11.03 1.031.05 1.051.03 1.03
Sprayed cellulose fiber (32mm(1-1/4") on solid backing) 喷涂纤维素纤维( 32毫米( 1-1/4 “ )的坚实后盾)0.1 0.10.3 0.30.73 0.730.92 0.920.98 0.980.98 0.98
Sprayed cellulose fiber (75mm(3") on solid backing) 喷涂纤维素纤维( 75毫米( 3 “ )在坚实的后盾)0.7 0.70.95 0.951 10.85 0.850.85 0.850.9 0.9
Wood tongue-and-groove roof decking 木材舌槽屋顶盖板0.24 0.240.19 0.190.14 0.140.08 0.080.13 0.130.1 0.1
Miscellaneous surface material 杂项表面材料125 Hz 125赫兹250 Hz 250赫兹500 Hz 500赫兹1 kHz 1千赫2 kHz 2千赫4 kHz 4千赫
People-adults (per 1/10 person) 人成人(每1 / 10人)0.25 0.250.35 0.350.42 0.420.46 0.460.5 0.50.5 0.5
People-high school students (per 1/10 person) 人高中生(每1 / 10人)0.22 0.220.3 0.30.38 0.380.42 0.420.45 0.450.45 0.45
People-elementary students (per 1/10 person) 人民小学的学生(每1 / 10人)0.18 0.180.23 0.230.28 0.280.32 0.320.35 0.350.35 0.35
Ventilating grilles 通风格栅0.3 0.30.4 0.40.5 0.50.5 0.50.5 0.50.4 0.4
Water or ice surface 水或冰面0.008 0.0080.008 0.0080.013 0.0130.015 0.0150.02 0.020.025 0.025
RT60 relates to intelligibility. RT60涉及可理解。 Diffractors reduce pronounced reflection by breaking up the sound wave before reflecting it back. 突出反映Diffractors减少 , 打破了声波在反射回来。 This does not reduce reverberant energy, but does reduce echo spikes that may otherwise exceed -60db of direct, thus lowering RT60 and improving intelligibilty, but not necessarily improving the listening environment for music . 这并不减少reverberant能源,但不减少回波峰值可能另有超过-六十零分贝直接,从而降低
skynoo
发表于 2009-5-17 01:11
不用搞得那么复杂,我这几个月就在调一个落地箱,我是新手,我的心得是买几块吸音棉回来自己填,吸音棉也不贵,自己尝试不同填充量下的效果。不同位置不同量的填充,对三个频段都有影响,自己找出最合适的。肯定能做到
chhart
发表于 2009-5-17 14:43
我喜欢放得多一些。因为我喜欢监听的风格。
就像一间房子。如果没有吸音装潢,声音回声很大,有的人会觉得声音很好听,我却觉得不能入耳。假如房间做过吸音装潢,里面又有布艺沙发、羊毛地毯等,自然清晰,干净。
不要把浑浊和音染当作美声,当作韵味!!
arlthlord
发表于 2009-5-17 16:31