Q We have a serious echo problem that exists in the public corridor of the mall office. With restrooms interconnected to the corridor at one end, can you please make a suggestion on how to reduce or omit the echo problem that currently exists?
A

The two suggestions that we would make would be our 25mm (1inch) thick Echo Eliminator Panels adhered directly to the ceiling –spaced evenly along the 50 meter length surface.  If one would install 40 to 50 square meter of the cotton into the space, we would be very surprised to hear of any kind of echo in that space.  The ceiling panels might be a little less visually intrusive as wall panels may be – and considering that it’s a public space, they will almost definitely last longer.  These panels are made from recycled cotton with Class A/1 Fire rating, and are one of the most cost effective, yet acoustically absorbent panels available on the market.  Each 2 feet x 4 feet panel weights only 2lbs, so they will adhere securely to the ceiling easily and with a construction grade caulk tube adhesive and/or spray contact adhesive.  This also happens to the sound absorbent core used in the WallMate System, another possibility for solving your echo problems.

Another solution you might want to consider is the Fabric Wrapped Fiberglass Panels.  These are just as absorptive as the Echo Eliminator, but you have the ability to specify any panel size up to 4 feet x 10 feet panel dimensions as well as choose from hundreds of different fabrics to face each panel with.  We would suggest sticking with the 25mm (1 inch) thickness.  If you want to see samples, please let us know and we will get them on the way as soon as we can.

 

 

Q We hear traffic noise in our master bedroom which faces the street and I am looking for a method to reduce it as much as possible.
A

The two most important things to keep in mind when you are dealing with a sound transmission issue are eliminating ANY common air spaces and increasing the amount of mass/density in between your noise source and a potential “listener.”  A 1% air gap in any kind of a noise barrier will leak 30% of the sound from one side to the other, and a 5% gap will allow for a 90% leak.  If you consider that sound travels through air, you can quickly see how even a tiny gap will allow for a significant amount of sound transmission.   Additionally, the more mass and density that you introduce as a sound barrier, the weaker the pressure wave will be after it passes through the mass.

We have two products to suggest:
Magnacoustic Wnsert Windows
Acoustical Quilted Curtain

The Magnacoustic window is going to perform the best and be the least visually intrusive as well as the easiest to install.  Furthermore, because of the increase in thermal performance of the window, it will also pay itself off in a few years.   This window was designed to be a re-usable heating and cooling thermal product, but because it does such a good job at eliminating any kind of draft or common air space between the inside and outside of the house, we found that it does a very good job at blocking sound as well.  The performance of the window will depend on the sound transmission rating of the casement window as well as the decibel level and frequency of the noise source.  It will also depend on the ambient level of the room in which the windows are being installed.

The other product that has been used in similar situations is the Quilted Curtain product.   This is a fairly rigid acoustical panel.  It originated as an industrial grade product which could be used to enclose a noisy machine in a manufacturing plant or be used as a movable sound wall.  It is usually fairly challenging to get it into a residence not only because of the look of the product but also because of the weight.  The “active ingredient” in the curtain is an 3mm (1/8 inch) thick, 1lb. per square foot Mass Loaded Vinyl noise barrier.  On either side of the vinyl, we place a nominally 25mm (1 inch) thick piece of fiberglass, and then quilt the whole product in a heavy duty vinyl. 

Q Do you have any sound absorbent products that we can use at the boiler room to block the boiler sound that currently escapes from the room?
A

We have a few products that will both absorb echo as well as block sound transmission.  All of the products are Class A/1 with Fire rating, and can adhere directly to the wall with adhesive. 

The first and most effective is the Melamine Composite Acoustical Panels.  These panels are made from the standard acoustical foam.  In the center of these panels is a layer of Mass Loaded Vinyl noise barrier which is basically a technology that has been designed to replace lead.  As the sound wave hits the dense vinyl, it will move or vibrate the vinyl slightly turning the sound energy into heat energy which is how the sound is “blocked.” 

Another panel that you might want to consider is the Sound Silencer Panels.  These are panels made from a polypropylene bead board, and although they are more cost effective than the previous option, they are also slightly less effective. 

One other option is the Echo Eliminator Composite Panels.  This is a cotton based panel with an aluminized Mylar facing on one side.  The panel that will be the best option for you basically depends on what you need acoustically as well as the budget that you have for the project.  We would be happy to talk to you about the products suggested above.

Q MRI scanner - magnet makes loud noises and bothers the technicians in the control room, noise even comes through RF door and wall. Any suggestions we can apply?
A

Getting an air tight seal around the door is absolutely critical to blocking sound, so if there are any air gaps around the sides or between the door and the floor, they must be taken care of.  This can be done with one of our Adjustable Door Seals or by purchasing an acoustically rated door like the Studio 3D door

As far as treating the wall, there are many different ways to approach this. Our first recommendation would be the Melamine Composite Panels.  These are 2 feet x4 feet panels made from standard melamine acoustical foam with a center layer of Mass Loaded Vinyl which is a noise barrier.  

Another option for acoustical treatment of the wall would be the Sound Silencer Acoustical Panels.  These are also 2 feet x 4 feet panels that are generally glued to the sheetrock surface.  They are available in a 1 inch or 2 inch thickness, and obviously, the thicker the better.  

Please feel free to contact us if you want to know more about the products that we recommended above. 

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