Noise Control

Construction Techniques in Audible Planning of a Building

The structural elements and their construction for managing noise in buildings are noted below:

Construction of Walls for Noise Control in Buildings

Wall is the most important structural element in all types of buildings, that furnish protection from the noise outside as well as insidely. The consumption of different wall materials or the consumption of different designs for the wall would bring different in the insulating properties of the element.

The methods used for noise control in buildings are detailed in the following:

1. Wall Mass and the Thickness are Expanded:

The extensiveness of a material is a well-planned parameter that withstands noise. Hence concrete walls are good insulating than that of wooden walls. Another way of increasing the insulating property is to add more thickness to the walls.

The increase of thickness of walls would result in more mass which in turn increases insulation. A reduction of 6 decibel sound happens with this method of construction. But the techniques must be carried out keeping in mind the cost and economy.

Wall construction that undertakes vibration under large frequencies of sound has to be neglected.

2. Use of Cavity Partition in Buildings for Controlling Noise:

The sound transmission can be withstood by the utilization of usage of airspace between the two partition walls. The air space can also be placed in between two or more layers. This concept is more effective than a single wall of equal weight, which is found to be more economical.

3. Increase Airspace Width of Walls:

The increase in airspace will obviously increase the noise insulation property. But the huge increase in the width of air space is difficult to design and consumes more space.

4. Increasing the Stud Spacing:

It is found by a study that the spacing between the studs would increase the sound transmission capacity of the room. Say an increase of 2 to 5 decibel STC is determined for a stud spaced 24 inches than those spaced at 16 inches.

5. Usage of Studs in a Staggered Manner:

The positioning of studs in a lurch manner, where studs are arranged alternatively would help in noise absorption, thus reducing noise intensity.

6. Studs and Panels held together by Resilient Materials:

Making use of inexpensive resilient layers like glass or fiberboard, or semi-resilient attachments which are inert in nature, will help in reducing the STC rate by two to five decibels.

7. Panels Used are Dis-similar:

Using different thicknesses and materials for panels would help in the reduction of noise, thus increasing the sound insulating quality of walls.

8. Sound Absorbing Blankets Used in the Airspace:

The sound-absorbing blankets are also called as isolation blankets which are placed in the airspace arrangement, that is provided between the panels. This blanket enables an increase in sound attenuation.

Mineral or rock wool, wood fibers or fiberglass are some of the materials used to make these blankets. These blankets have an attenuation capability of up to 10 decibels. The method is more constructive where lightweight construction is more notable.

9. The Cracks and Edges are Sealed:

The full advantage of a high-performance wall can be brought out only when it is properly sealed and crack free. The perimeter of the wall must be properly sealed.

The formation of cracks or holes would affect the insulation property of the wall. It has been observed that a hole of the 1-inch square will result in a reduction of STC of the wall by 10.

Noise Control in Buildings by use of Masking

This method involves the drowning of noise with the help of background noise. This is effective during noise fluctuations. Masking can be created by soft music, electronic devices or air conditioning systems and heating systems.

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