Wednesday, 27 November 2024
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Acoustic Insulation

What is sound power and how can we explain this term?

Sound power is the rate of the sound energy in unit area.  The magnitude of this term is defined as dB (decibel). We can give those examples about sound level below:


Sound source and location      
Sound of a plane at taking off. (25 m distance) 
Digging operation on the road                           (7 m distance) Alarm clock       (1 m distance)
Automobile travelling at 50 km/h (inside of the car)
Daily speech      (1 m distance)
Bedrooms

 Sound Pressure Level dB(A)* 
 140 dB(A)
 90  dB(A)
 80  dB(A)
 70  dB(A)
 50  dB(A)
 35  dB(A)

 

* dB(A) Defines the ‘’sound pressure level’’ for the frequency range that human being can hear.

What are the allowable loudness levels for indoor places?

According to the Analysis and Management of Environmental Loudness Regulation, additional precautions have to be taken so as to keep indoor loudness levels below the limit values. The limit values for the loudness level are given below:

Area of Use

Limit Values for IndoorLoudness Level  (dBA)

Period of Time

Cultural Facilities

Theatre Halls

 30

 Permanently

Cinema Halls

 30

 Permanently

Concert Halls

 25

Permanently

Conference Halls

 30

Permanently

Educational Facilities

Classes, pre-school classes, educational facilities for disabled people etc.

 35

 During the lecture

Fitness center, dining hall

 55

 During the activity

Bedrooms at pre-schools

 30

 During the sleep

Household Use

Bedrooms(in the city)

 40

 At night

Bedrooms(out of the city)

 35

 At night

Sitting rooms (in the city)

 55

In the morning and evening

Sitting rooms (out of the city)

 40

In the morning and evening

Sitting rooms (beside the city)

 45

In the morning and evening

Kitchens (in-out of or beside the cirty)

 60

 During the activity

 

We are hearing the loudness of next-door neighbor in our flat. What can we do to prevent this?

You can prevent the loudness of your neighbor by applying sound insulation between two flats. For this purpose, loud insulation materials, which absorb the reflected sounds from the walls and work as a spring, placed between profiles or directly pasted onto the walls and in front of those materials second another coating material applied. By this way “mass-spring-mass” principle is implemented on the walls and sound transfer performance can be enhanced.

Do I or my upstairs neighbor have to apply sound insulation for the loudness coming from my upstairs neighbor?

The main rule for sound insulation is to solve the loudness problems in the source of the loudness since the control of loudness gets harder when it spreads. The most effective solution for the foot sounds of upstairs neighbor is taken precautions on the floor of upstairs neighbor. If upstairs neighbor doesn’t accept this, loudness would spread by your walls and your ceiling. For this reason, you have to have thermal insulation on your common walls and ceiling so as to solve the loudness problem caused by your neighbor.

We are hearing foot and talking sounds of our upstairs neighbor. What can we do to prevent this?

Your upstairs neighbor has to have sound insulation on the floor so as to prevent the air born sounds such as music, talking etc. and the impact sounds such as foot sound, furniture pulling sound etc. For this reason sound insulation materials are laid on floors in buildings and twisted to the walls until base board level. By this way the contact of the floor, where the people walk and the sound waves spread, with walls is cut, a kind of sound insulation pool is made and direct or indirect sound transfer is eliminated.

Floor coating, on which people walk, doesn’t have any connection with walls, that’s why those systems called as floating floor.

Materials used for sound insulation applications chosen due to the need. In various thicknesses and open porous sound insulation materials, such as glass wool, stone wool, acoustic sponge are used for reducing the sound transfer, caused by music, talking(air born sound) and impact, furniture pulling(impact born sound), between places. On the other hand, just for preventing impact born sounds, insulation materials with small number of dynamic hardness are used in very small thickness such as in millimeters.

I stay on a main road with an intensive traffic. Is it possible to prevent the loudness?

By taken precautions you can have a house purified from the environmental loudness.

Is sound insulation possible by the use of polystyrene foams?

Polystyrene foams are closed porous thermal insulation materials. Thus they are not used for sound insulation. Air born sounds such as talking, music, TV etc are insulated by using open porous materials (glass wool, stone wool, acoustic sponge). Impact born sounds are insulated by using polyethylene foam, rubber sheet, stone wool and sponge in high density.

Does using triple glazing at windows provide a better sound insulation?

The loudness control property of triple glazing is not better than double glazing. The practical way of sound insulation is to increase the thickness of the glass and to use insulated glass units for special purposes. In double glazing selection of different thickness values or having one of the glasses with lamination enhances sound control. For better sound insulation using glasses with acoustic lamination as one board or using them in the constitution of sound insulation glass. The combination and thickness of glass is selected due to the type and strength of loudness.

Can I execute sound insulation by myself or by the aid of known old hands?

Your building has to be analyzed by experts and the thermal insulation applications have to be applied by the firms that have background information about thermal insulation

.Due to your request our firm would create special solutions for you with right insulation projects.