Airborne Sound

There is more than one type of sound and to properly insulate your property you will need to insulate against both impact sound and airborne sound.

10
Oct
2020

Soundproof Foam VS Acoustic Foam

The misconception about foam being soundproof exists mostly because people lack the understanding of the differences between sound absorption and soundproofing.

It is natural to assume that if products like foam absorb sound, there will be none that is left to escape the room.

Unfortunately, sound is not like a fluid that gets absorbed and trapped in something like a sponge. The way sound behaves needs to be understood clearly here.

Sound waves are nothing but vibrations and when they strike a surface, they tend to vibrate it.

Sound does not ‘pass’ through a wall or ceiling but merely vibrates it. These vibrations are further transferred to the other side and that is how sound transfer takes place through walls, ceilings, and other surfaces.

1. Walls and Ceilings

The most common myth is that panels made of foam can be stuck on walls and will reduce the amount of sound from entering or leaving a room.

The foam that you see stuck on the walls of studios is not meant for soundproofing but is meant for sound absorption. The products that do the actual soundproofing in a studio are something else.

What You Should Be Doing Instead

You should first of all try to make your walls heavier. You can add mass to your wall by:-

Extra Drywall

Installing an additional layer or two of drywall will help to reduce sound transfer. A 5/8” thick drywall sheet weighs 2.31 pounds per square foot. That’s some serious mass and is a great substance for reducing sound transfer.

Coming back to foam, there are many varieties available and their densities vary depending on the type and grade. However, the foam would have to be several inches thick to match the mass of drywall.

Pros

  • Low cost.
  • Lots of mass.

Cons

  • Effort and workmanship required to install.
  • Involves modification of structures, so not an option for rented apartments.

Floors

  • Impact Noise
  • Airborne Noise

Impact noise is the noise caused as a result of footsteps or furniture being moved on the floor.

Airborne noise is the sound that is normally transmitted through the air and these include traffic noise, dog barking, neighbors yelling, and everything else.

Posted by admin in Acoustic blinds or curtains, Acoustic panels, Acoustic Treatment, Airborne Sound, Control Sound, How To Soundproof Doors, Metropolitan Insulation, Modern Soundproofing, Sound Insulation for Old Houses, Sound Insulation Ideas, Soundproofing, Soundproofing Apartments, Soundproofing Commercial Property, Soundproofing for musicians, Soundproofing New Homes, Spray Foam Insulation
11
Jun
2020

Soundproofing and Acoustic Treatment: What’s the Difference?

Sound can be divided into two types: direct and indirect. Starting from the source, the sound travels in outward directions all around.

Direct travels in a straight line, whereas the reflected or indirect, randomly bounces in the room and between its surfaces. 

Indirect sounds are echoes, reverbs, vibrations and similar. Direct sound remains the same, but the reflected change the original sound.

The change is either good or bad, depending on the size of the room, and its properties.

What Is Soundproofing?

The purpose of soundproofing is to block or minimise the level of sounds, both those traveling in and outside of the room.

So, the main idea is to have the sound focused – do not let the desired one get out, and, at the same time, do not let the unwanted ones come in!

This can be done either by blocking or sealing. 

Sealing refers to all those tiny gaps, particularly in windows and doors.

What Is Acoustic Treatment?

Quite opposite from the previously mentioned, where the main idea is to block the sound, the purpose of acoustic treatment is to control the sound.

This particularly refers to indirect sounds, such as echoes, vibrations and similar.

So, it’s about controlling the sound that’s exclusively inside the room. 

Soundproofing or Acoustic Treatment – ​Which to Choose?

Before you get down to business, be sure to know what exactly are you looking for? Do you want to reduce the echo?

Or you want to block all the sound except for the one you are making?

These are some of the questions you have to answer so that you know what the problem you have to deal with is.

Besides this, the dimensions of your room, as well as its shape are key factors.

If it’s in a building, that means dealing with numerous outside sounds as well.

The simple evaluation of the acoustic properties of your room is the best way to decide what you need.

Sometimes the help of a professional is needed in order to adjust the room as best as possible.

For more information and advice on what would be the best option for you, contact Metropolitan Insulation today and we’ll happy to help.

Posted by admin in Acoustic panels, Acoustic Treatment, Airborne Sound, Common Soundproofing Myths, How To Soundproof Doors, Modern Soundproofing, Office Soundproofing, Soundproofing, Soundproofing Apartments, Soundproofing Commercial Property, Soundproofing New Homes
15
Aug
2018

What’s the Difference Between Airborne Sound and Impact Sound?

There is more than one type of sound and to properly insulate your property you will need to insulate against both impact sound and airborne sound. Here’s a brief guide to these sound types and how effective insulation can help you control their impact.

Airborne sound can come from a wide variety of sources bot inside and outside your property and as the term suggests the sound will feel as if it is in the air around you. Some typical examples of things that create airborne sound include noise from traffic, music, TV vacuum cleaning to name but a few.

Being exposed to these noises for any length of time can impact on your quality of life depending on the level of noise they generate and for how long.

Impact sound on the other hand is generated when people are walking up stairs, on floors above in apartments, or appliances such as washing machines, drills, hammers and so on. This type of noise can be particularly irritating even if the disturbances are usually short term in domestic environments.

Sometimes noise can fall into both airborne and impact sound categories when sound vibrates from a surfaces.

The key to reducing airborne sound is to eliminate gaps that will allow sound to travel between spaces. Impact noise can be reduced by something as simple as fitting carpets that are significantly better at absorbing impact sound from footsteps than wood floors.

Posted by admin in Airborne Sound, Insulate Your Home, Insulating Your Loft, Metropolitan Insulation, Noisy Neighbours, Soundproofing