Home Theater Soundproofing
To realize the "dream of a big movie" in your own house or apartment, it’s not enough to buy a half-wall TV or even a video projector with related equipment.
None of the most expensive speakers will give the expected sound quality if you do not take care of the soundproofing of the room in a timely manner.
A room for a full-fledged home theater needs to be planned at the design stage. Moreover, the design, rather, is not a typical apartment, but a country house. And it is better to place it in the basement or basement, where the walls and floors are thicker, which means that it will be possible to save a little on the sound insulation of a home theater.
In an apartment for hosting a home theater, the largest room is best suited. At the same time, the length, width and height of the room should not coincide or be multiple to each other.
In rooms of the correct cubic shape, the room’s own resonances will significantly distort the sound of any, even the most advanced speaker systems. Thus, for a room with a ceiling height of 3 meters, the recommended length of the hall should be at least 7.9 m and a width of 4.9 m. Please also note that about 30 cm will “eat” the sound insulation of the floor and ceiling, and another 12 cm - insulation of each wall of the room.
Since the most “noisy” element of a home theater is a powerful subwoofer standing on the floor, it is better to start soundproofing the room from the floor. Moreover, the “buzzing” - and this is how neighbors perceive low frequencies - accounts for the most of their complaints.
The best option for noise and sound insulation is to increase the thickness of structures. Therefore, if the floors allow, an additional concrete screed is made using the “floating floor” technology for sound insulation.
Such a floor is called “floating” because the poured concrete layer does not touch the walls and floor of the room. The concrete slab lies in a kind of "tray" of elastic material - for example, from Shumostop slabs. To increase the effectiveness of noise insulation boards can be laid in several layers. A film is laid on top of the insulating boards and cement mortar is poured.
If for some reason the screed can not be made, then thin elastic gaskets from soundproofing material are laid directly under the laminate or other floor covering.
Another option for attaching a soundproof floor is on the logs. In this case, it is necessary to use gaskets in the places where the lag rests on the supporting floor slab or supporting beams to reduce the transmission of impact noise. It is also mandatory to fill the internal space with effective sound-absorbing materials - for example, all the same Schumanet plates.
Soundproofing walls can be done in two different ways. Firstly, by wireframe technology. If the interior ceilings are quite thick, then it is permissible to use a conventional aluminum profile, drywall and mineral wool. However, under the influence of high power sound, the profile may vibrate. To avoid this, it is necessary to fix the profile on vibration dampers. You can also replace the aluminum profile with a wooden beam.
The second method of soundproofing the walls is a soundproof panel system of the frameless type (ZIPS). She has several distinctive features.
The lack of a guide frame. The panels are sandwiches consisting of tongue-and-groove gypsum fiber sheets and layers of sound-absorbing material from mineral raw materials.
The system is attached to the surface to be protected (wall or ceiling) only through special vibration-isolating nodes.
The ZIPS system does not have hard contact between the ends of the panels in places from the interface with the side walls or ceilings.
The tongue-and-groove joint of the sandwich panels eliminates the appearance of possible cracks during installation.
Soundproofing ceiling is also mounted as a standard drywall ceiling. The differences are as follows.
The standard mineral wool core is replaced with special soundproofing boards.
In places where the bearing frame adjoins the walls and ceiling, vibration pads are used.
To reduce vibrations, vibration isolating suspensions are used. They "crash" between the ceiling and standard direct suspensions of the "KNAUF" type or rods of adjustable suspensions. This eliminates the sound bridges, which significantly increases the sound-insulating ability of frame suspended ceilings.
They must also have good sound insulation. Otherwise, all the sound will pass through them, and all the acoustic sense in the isolation of other surfaces is lost.
The door should be massive, sealed on all the narthex, including the threshold, and closed with a lock-lock. Sometimes it is advisable to install a vestibule (two doors with an air gap). There are various offers of soundproofing doors on the market: from simple ALAVUS (30dB) to expensive HORMANN (42 47dB)