離心玻璃棉對聲響中的高頻有較好的吸聲功能。影響離心玻璃棉吸聲功能的主要因素是厚度、密度和空氣流阻等。密度是每立方米資料的重量?？諝饬髯枋菃挝缓穸葧r資料兩側空氣氣壓和空氣流速之比?？諝饬髯枋怯绊戨x心玻璃棉吸聲功能重要的因素。流阻太小，說明資料稀疏，空氣振蕩簡單穿過，吸聲功能下降；流阻太大，說明資料密實，空氣振蕩難于傳入，吸聲功能亦下降。關于離心玻璃棉來講，吸聲功能存在流阻。

Centrifugal glass wool has good sound absorption function for high frequencies in sound. The main factors affecting the sound absorption function of centrifugal glass wool are thickness, density, and air flow resistance. Density is the weight of data per cubic meter. Air flow resistance is the ratio of air pressure and air velocity on both sides of the data per unit thickness. Air flow resistance is an important factor affecting the sound absorption function of centrifugal glass wool. The flow resistance is too small, indicating sparse data, simple air oscillation passing through, and decreased sound absorption function; If the flow resistance is too high, it indicates that the data is dense, air oscillation is difficult to enter, and the sound absorption function is also reduced. Regarding centrifugal glass wool, there is flow resistance in its sound absorption function.

在實踐工程中，測定空氣流阻比較艱難，但可以通過厚度和容重粗略估計和控制。

In practical engineering, measuring air flow resistance is relatively difficult, but it can be roughly estimated and controlled through thickness and bulk density.

隨著厚度增加，中低頻吸聲系數顯著地增加，但高頻變化不大（高頻吸收總是較大的）。

As the thickness increases, the sound absorption coefficient at medium and low frequencies significantly increases, but there is not much change at high frequencies (high frequency absorption is always large).

厚度不變，容重增加，中低頻吸聲系數亦增加；但當容重增加到必定程度時，資料變得密實，流阻大于流阻，吸聲系數反而下降。關于厚度超過5cm的容重為16Kg/m3的離心玻璃棉，低頻125Hz約為0.2，中高頻（>500Hz）的吸聲系數已經接近于1了。當厚度由5cm繼續上漲時，低頻的吸聲系數逐漸提高，當厚度大于1m以上時，低頻125Hz的吸聲系數也將接近于1。當厚度不變，容重上漲時，離心玻璃棉的低頻吸聲系數也將不斷提高，當容重接近110kg/m3時吸聲功能達到較大值，50mm厚、頻率125Hz處接近0.6-0.7。容重超過120kg/m3時，吸聲功能反而下降，是因為資料變得細密，中高頻吸聲功能受到很大影響，當容重超過300kg/m3時，吸聲功能減小很多。修建聲學中常用的吸聲玻璃棉的厚度有2.5cm、5cm、10cm，容重有16、24、32、48、80、96、112kg/m3。通常使用5cm厚，12-48kg/m3的離心玻璃棉。

The thickness remains unchanged, the bulk density increases, and the sound absorption coefficient at medium and low frequencies also increases; But when the bulk density increases to a certain extent, the data becomes dense, the flow resistance is greater than the flow resistance, and the sound absorption coefficient actually decreases. Regarding centrifugal glass wool with a bulk density of 16Kg/m3 and a thickness exceeding 5cm, the low-frequency 125Hz is about 0.2, and the sound absorption coefficient at medium and high frequencies (>500Hz) is close to 1. As the thickness continues to increase from 5cm, the low-frequency sound absorption coefficient gradually increases. When the thickness is greater than 1m, the low-frequency sound absorption coefficient at 125Hz will also approach 1. When the thickness remains unchanged and the bulk density increases, the low-frequency sound absorption coefficient of the centrifugal glass wool will also continue to increase. When the bulk density approaches 110kg/m3, the sound absorption function reaches a larger value, and at a thickness of 50mm and a frequency of 125Hz, it approaches 0.6-0.7. When the bulk density exceeds 120kg/m3, the sound absorption function actually decreases because the data becomes more detailed, and the medium and high frequency sound absorption function is greatly affected. When the bulk density exceeds 300kg/m3, the sound absorption function decreases significantly. The thickness of sound-absorbing glass wool commonly used in construction acoustics is 2.5cm, 5cm, and 10cm, with bulk densities of 16, 24, 32, 48, 80, 96, and 112kg/m3. Typically, 5cm thick, 12-48kg/m3 centrifugal glass wool is used.

離心玻璃棉的吸聲功能還與安裝條件有著密切的聯系。當玻璃棉板背面有空氣層時，與相同厚度無空氣層的玻璃棉板吸聲作用類似。尤其是中低頻吸聲功能比資料實貼在硬底面上會有較大提高，吸聲系數將隨空氣層的厚度增加而增加，但增加到必定值后作用就不顯著了。

The sound absorption function of centrifugal glass wool is also closely related to installation conditions. When there is an air layer on the back of the glass wool board, the sound absorption effect is similar to that of glass wool boards with the same thickness but no air layer. Especially, the sound absorption function at medium and low frequencies will be significantly improved compared to data pasted on a hard bottom. The sound absorption coefficient will increase with the thickness of the air layer, but the effect will not be significant when it reaches a certain value.

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