Cooling towers produce quite a lot of noise, caused particularly by the fans and dropping water. If a cooling tower is established too close to a residential area, this may cause noise nuisance.

　　Traditional noise improvements are aw following : Installing sound barrier at the source or nearby the residential buildings to to insulate against noise, Installing deadening mat on the basin to reduce the noise of dropping water and installing ventilation shell at the outlet of intake fan. while these solutions are not effective and make cooling towers inefficient.

　　ES-CON / ES-LON provides a solution to reduce cooling tower noise and decibels by descending speed of fan, meet the demand of fill wind volumn as well and make cooling tower have optimum performance. It is absolutly much superior to cascade relay control not only to reduce the noise but save the energy and power.