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
Total 250Hz 1KHz 2.5HKz 5KHz 8KHz 10KHz 12.5KHz 16KHz
Decibel Reduction 23.1 13.2 27.7 22.7 22.1 24.2 27.0 26.1 25.7
Jacket 2 – Decibel Reduction
Total 250Hz 1KHz 2.5HKz 5KHz 8KHz 10KHz 12.5KHz 16KHz
Decibel Reduction 21.9 14.6 28.6 24.4 25.9 32.3 31.9 30.2 19.5

 

            Before Thermaxx Jacket                                      After Thermaxx Jacket

Loud Machine without Insulation

sound attenuation photo 5

 

About Thermaxx Jackets

Thermaxx Jackets was founded over 25 years ago with a single purpose: to save energy when traditional stay-in-place insulation is not practical. Combining expertise in heat loss, wireless monitoring, insulation design, and several other disciplines, we’ve become the #1 provider of removable insulation jackets and covers.
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One Response to Removable Insulation Jackets for Sound Attenuation

  1. Tim Locke says:

    We are an industrial design and construction firm with some projects with noises valves. We would like to purchase or build some acoustic noise reduction enclosures. We do not have an acoustic engineer on staff. We are looking for a supplier to assist.
    Tim Locke

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