Removable Insulation Jackets for Sound Attenuation

Written by Brian Bannon & Michael Bannon, co-owner of Thermaxx Jackets
 

Sound Attenuation Photo 1Sound has its place in our lives. Can you imagine a quiet police or fire siren? Going to a concert and having to be quiet to hear the music? How about being able to hear crickets when a walk off home run is hit during a postseason baseball game? No! Sound & noise aren’t always unwelcome in our lives.

However, sometimes sound does not have a place and does not belong. Such as when you’re trying to repair your steam boiler and the PRV above your head sounds like a 747.  Perhaps you’re on a conference call and the machine on the other side of your office’s wall sounds like it is jackhammering the wall to pieces.

sound attenuation photo 2The problem with industrial machines that make this much racket is that they usually generate heat. Most sound deadening materials are only effective up to 140f. This is a problem when the machine has a touch temperature of 200f. Rather than a sound problem, we now have a potential fire. Fortunately, there is a solution!

Removable insulation can now be built with layers of insulation, facing the machines, to reduce the heat with each layer of insulation. Insulation thickness is designed to reduce the temperature to allow for sound deadening material (Mass Loaded Vinyl or Silent Tread) to be installed.

sound attenuation photo 3Once the heat is reduced to an acceptable temperature, we can focus on reducing decibels. The tables below show two removable insulation jacket designs and list the decibel reduction for each.

Jacket 1 is an interior jacket designed for sheltered areas that are not exposed to the elements. Jacket 2 is for outdoor conditions and is hydrophobic.

Get more information on Thermaxx Removable Noise Insulation Jackets, or contact us.

Jacket 1 Indoor (dry)Jacket 2 Outdoor (wet)
  • Layer 1- Silicone impregnated fiberglass
  • Layer 2- Fiberglass
  • Layer 3 – Silent Tread
  • Layer 4- EVA
  • Layer 5- Silicone impregnated fiberglass
  • Layer 1- Silicone impregnated fiberglass
  • Layer 2- Pyrogel
  • Layer 3 – Silent Tread
  • Layer 4- EVA
  • Layer 5- Silicone impregnated fiberglass
Jacket 1 – Decibel Reduction
Total250Hz1KHz2.5HKz5KHz8KHz10KHz12.5KHz16KHz
Decibel Reduction23.113.227.722.722.124.227.026.125.7
Jacket 2 – Decibel Reduction
Total250Hz1KHz2.5HKz5KHz8KHz10KHz12.5KHz16KHz
Decibel Reduction21.914.628.624.425.932.331.930.219.5

 

            Before Thermaxx Jacket                                      After Thermaxx Jacket

Loud Machine without Insulation

sound attenuation photo 5

 

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