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冷卻塔是一種熱交換設備， 噪聲源主要有以下幾個方面：

冷卻塔風機噪聲，主要分為散熱風機的機械噪聲和風機進排氣空氣動力性噪聲，特性為低頻。

安裝在冷卻塔上部的風機主要是逆向抽出的，以此來達到降溫的目的。而風機的高速旋轉(zhuǎn)會產(chǎn)生空氣動力性噪聲，旋轉(zhuǎn)中的多個葉片作用于氣流，然后引起氣壓和運動速度呈脈動變化產(chǎn)生的，其旋轉(zhuǎn)部件的不平衡會導致結構發(fā)生振動，從而產(chǎn)生振動噪聲。

冷卻塔落水噪聲，冷卻塔的循環(huán)水從上部噴淋管流下，經(jīng)過自由落體會產(chǎn)生沖擊噪聲，與落水速度的平方成正比，與撞擊水面的四次方成反比。

冷卻塔塔體噪聲，冷卻塔塔體機械的噪聲，主要來源于機器部件的振動。機器的零件都會在工作中發(fā)生彈性變形，然后產(chǎn)生振動。具有彈性的機械部件將振動能量傳播到輻射表面時，就會經(jīng)過空氣傳播出去，形成機械噪聲。

Cooling tower is a kind of heat exchange equipment, and the noise sources mainly include the following aspects:

The noise of cooling tower fan is mainly divided into mechanical noise of cooling fan and aerodynamic noise of fan inlet and exhaust, with low frequency characteristics.

The fan installed on the upper part of the cooling tower is mainly extracted reversely to achieve the purpose of cooling. The high-speed rotation of the fan will produce aerodynamic noise. Multiple blades in rotation act on the air flow, and then cause pulsating changes in air pressure and moving speed. The imbalance of its rotating parts will lead to vibration of the structure, resulting in vibration and noise.

Cooling tower water falling noise: the circulating water of the cooling tower flows down from the upper spray pipe and will produce impact noise through the free falling body, which is directly proportional to the square of the falling speed and inversely proportional to the fourth power of the impact water surface.

The noise of the cooling tower and the mechanical noise of the cooling tower mainly come from the vibration of machine parts. The parts of the machine will be elastically deformed during work and then vibrate. When elastic mechanical parts transmit vibration energy to the radiation surface, it will be transmitted through the air to form mechanical noise.