Sound and acoustic insulation in the building

Various noises such as the sound of car horns, conversations of people outside the building, the noise of chaos and traffic, etc. enter the building through doors, windows and walls and disturb the peace of the residents. These sounds have always existed and cannot be prevented, but there are many ways to avoid them. In recent construction, builders and contractors are trying to use materials that prevent as much noise as possible from entering the building due to increased noise pollution. These materials significantly prevent the transmission of sound and provide a safe and quiet place for the well-being of residents. Sound insulation is one of the essential needs in today's chaotic world, and in fact it can be considered as a barrier to reflection and sound transmission. Today, many buildings, both commercial and residential, are equipped with these insulators, and the necessary standards have been met to prevent noise from being constructed.


A good insulator should have the right density to maintain its acoustic state. Therefore, before buying sound insulation, you should make sure that the density and thickness are standard. Many companies are engaged in the production of various types of moisture, sound and heat insulation and provide their products to consumers with high diversity. Depending on the location and the amount of noise, you can buy the ideal sound insulation. For example, you can use common wall sound insulation to prevent the transmission of TV, telephone and everyday calls. This insulation is used as a roll or board and provides peace of mind for apartment dwellers whose rooms are wall to wall.


Sound intensity (db)


Explanation


Example

0


Hearing threshold


Audio test room

10


Very quiet


Ordinary breathing

20


Silent


Whisper with one person in a quiet room

30


Silent


Ordinary house, quiet radio, ordinary conversation

40


Normal


Radio, silent office, car engine

50


Busy


Conversation at work

60


Busy


Crowded office, long radio

70


Loud noise


Crowded street, quarrel

80


Loud noise


Vacuum cleaner, door jammer

90


Very crowded and loud noise


Inside the city bus, printing house

100


Very crowded and loud noise


Car horn sound from a distance of 6 meters, chainsaw from a distance of 1 meter



 What is the sound
In physics, sound is the mechanical vibration of a gaseous, liquid, or elastic reaction space. Sound is a form of mechanical energy that occurs when particles oscillate around their equilibrium center.
The table below presents the sound intensity produced by different audio sources for comparison.



Sound transmission mechanisms
There are usually two types of audio transmission mechanisms:
1- Airborne
2- Impact
In the air-conditioning mechanism, direct noise pollution is transmitted through the air from the sound source, such as the noise of cars on the street, mechanical equipment, ventilation systems, the neighboring neighbor's home theater system.
In the impact mechanism, noise pollution is transmitted from within the structural components themselves, such as the sound of people walking upstairs, hitting the adjacent wall, or closing the door.
Stroke Borne Sound is also called the Structure Borne Sound.
All sound transmission mechanisms must be considered to perform sound insulation. Joint doors, windows, valves and walls are insulated to prevent environmental noise pollution, and the building components themselves have layers of sound insulation.