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通用測試聲學特性
防火紙纖棉在Riverbank Acoustical Laboratories實驗室進行聲音傳輸分類（STC）測試。
在全尺寸牆體測試中，防火紙纖棉可有效地減少房間與房間之間的空氣音源傳導。這非常有益於集合式住宅的隔音，如高級住宅、套房、辦公大樓、公寓、汽車旅館和旅館，尤其對於您的家庭居家安寧尤其重要。
一般尖銳高頻的聲音，很容易通過正常結構傳輸，而防火紙纖棉的特性，可增加阻絕高頻音源空氣傳導的功效；建築物隔音用防火紙纖棉可讓居住者感受到明顯“安靜”的感覺。
降噪係數（NRC）[Noise (sound) in a room]
防火紙纖棉的通用測試降噪係數為0.75/in2。
NRC VALUES-ASTM C-423 | |||||||
INCHES | 125 | 250 | 500 | 1000 | 2000 | 4000 | NRC |
0.50英吋(註一) | .08 | .16 | .46 | .87 | 1.07 | 1.12 | .65 |
0.75英吋(註二) | .25 | .36 | .74 | .98 | 1.00 | .99 | .75 |
1.00英吋(註一) | .12 | .38 | .88 | 1.15 | 1.15 | 1.15 | 1.00 |
1 On solid backing(置於實心面上) 2 on lath plaster(置於石膏板上) | |||||||
聲音傳輸控制（STC）[Sound transmission through a wall]]
每增加1/2英吋紙纖棉的厚度，將增加2 dB的平均計算值到表中的STC評級。
STC分貝評分均來自通用的測試數據來計算。
2-1/2” metal Studs with 1/2” Gypsum wall board both sides 雙面單層1/2英吋厚石膏板牆體 | ||
Description | STC | |
No sound control material used | 沒有用隔音材料 | 31 |
2-1/2"sound barrier batt 2-1/2 | 使用2-1/2英吋(63.5mm)隔音棉 | 33 |
1-1/2"cellulose 1-1/2 | 使用1-1/2英吋(38.1mm)防火紙纖棉 | 49 |
wood stud assemblies | ||
Description | cellulose per inches |
STC |
2*4 stud 16" o.c. faced on both sides with 1/2" gypsum wall board |
1-1/2” |
41 |
2*4 stud 16" o.c. faced on both sides with 1/2" gypsum wall board |
3-1/2” |
51 |
2*6 stud 16" o.c. faced on both sides with 1/2" gypsum wall board |
5-12” |
55 |
2*4 stud on a 2*6 plate,spaced 16"o.c.and staggered on opposite sides,faced on both sides with 5/8" gypsum wall board |
2-1/2” |
60
|
metal stud assemblies | ||
Description
| cellulose per inches |
STC |
3-5/8" metal studs 24" o.c.faced on both sides with 5/8" gypsum wall board. | 1” |
49 |
3-5/8" metal studs 16" faced on both sides with 5/8" gypsum wall board. | 3-5/8” |
55 |
cellulose testing | 纖維素測試 |
ASTM STANDARD COMPLIANCE | 美國ASTM標準符合性 |
ASTM E 90 SOUND TRANSMISSION LOSS | 聲音傳播損失 |
ASTM E 413 SOUND TRANSMISSION LOSS | 聲音傳播損失 |
ASTM E 1042 Acoustical absorption | 吸聲 |
| ASTM E c 423 noise reduction coefficients | 降噪係數 |