If you are planning a music room - to either practice or play loud music, have a home theater or something else, the first thing you need to do is guard against the expansion of the sound.
Selection of rooms is important, where you at least bother others and where it is easiest to isolate. You can do a lot to reduce the sound, but it is quite noiseless to get it. Then you have to build a hermetically sealed room in the room, which is expensive and inconvenient. Much can be done to get you good rooms without too much noise for neighbors. There is also a choice how much you want to put into this with the level of ambition and money.
Most music room soundproofing projects need both soundproofing and sound absorbing materials. To understand what soundproofing products you need, first think about how sound works.
Sound-absorbing materials are used for the interior of the room. They suck up sound waves and prevent them from bouncing back from the walls. Echo and reverberation are minimized. Although these products do an excellent job of improving the sound quality, they are not designed to block sound. (Look further down.)
Soundproofing products block the sound. They are designed to stop the sound from moving from one place to another. The sound is kept inside the music room and reduces transport to other parts of the house. In addition to reducing sound that leaks out, sound insulation products will also stop unwanted sound in the room
Musicians often think that the soundproofing of the music room means creating a completely soundproofed area. To achieve this in a private home, it is practically impossible and extremely expensive. A term that better fits the music room is the reduction of noise transmission.
Sound insulation requires a sound barrier between exercise rooms and adjacent rooms. One way to isolate an area is to install heavy soundproofing products such as Acoustiblok or Tecsound. Their heavy mass blocks most of the sound, despite being only 2.6-3 mm thick.
Another way to isolate an area is to create airspace between the walls and reduce the number of contact points between building materials.
When construction elements are not in physical contact, the sound waves cannot be transmitted from one to the other.
See for example on this floor:
It is a "floating floor" with minimal contact surfaces and with Acoustiblok as a barrier membrane. The same principles can be used in the wall, where one can leave it an air space between the panels with minimal contact. Furthermore, use roof bars and lower the ceiling with a double coating, use heavy Rockwool and Acoustiblok.
Here we reduce the noise in the room itself (which also helps at the level that goes out). This is done with materials that are dense fibrous mats or sheets with special acoustic properties, or acoustic foam mats. This will not only reduce - but also harmonize the sound in the room for a better and softer noise climate and accentuate the music in a more comfortable way, as you avoid echoes and echoes. A lot of low-frequency music noise, one will notice that especially in the corners it will build up in level - and many then use so-called Bass traps Bass-traps to capture this.
When planning the room remember the following:
DÆMPIT absorbent plate 60 x 120 cm fastened with hoops in the ceiling/walls.
ECOHUSH PROFILE absorbent plate in div. patterns/colors, for gluing roofs and wall - 60 x 60 cm.
BASSTRAPS for low frequency absorbance in corners.
Are you going to use the room for comfortable music experience, or performance of speech, combinations etc. Then you have to look at the reverberation time. A tone or song in the room disappears as the sound energy is absorbed in different ways by the surface of the room. To find a measure of this - and since the volume itself is different, and what we want to measure, we have a norm: How long does it take for the sound to be reduced by 60 dB. Now we have a measuring tool for valuing, planning and changing the resonance in the room.
We even have a formula to calculate this value - Sabine's formula:
Time (in seconds) = 0.161x volume of room in cube.m
The sum of the areas in the room multiplied by the absorption coefficient of each material.
If you look at a room with 2.5 ”plasterboard 20 sqm on a wall and the frequency you want to consider is 500 Hz, we see from the tables that the absorbance value is 0.05. The number 1 will then be included in the sum of the surfaces. This way, you can extract the value of the most common coatings in the room. Tables for absorbance are available for most building / surface materials. In a kindergarten, it is normal that one does not want longer reverberation time than 0.6 seconds. If you add the measurements x the absorbance factor, you will soon see that at common frequencies you can quickly reach far above 0.6 seconds quickly in 2 and more in case of unfortunate combinations of concrete floor and plasterboard. Unfortunate for the living environment.
Fortunately, we have products that can reduce reverberation, such as Dimmed Comfort, Ecohush Profile, Lydac-P and Soberpoly - which we can offer you.
But in the world of music we must place ourselves on other scales.
For a generally good auditorium for both speech and music, we consider the level between 1.5 to 2.5 seconds as appropriate.
For richer music experience we can go up the scale - 3.5 to 5.5 gives long good tones. But here the speech no longer sounds so good, and then you have to go down the scale. If you come down to 0.3 sec you hear a dry blunt song.
Boston Symphony Hall has a reverberation time of 1.8 seconds. Vienna Musikvereinsaal, (which we hear New Year's concert from) has 2.05 sec. At the top of the scale is Notre Dame with measured 8.5 for the largest organ pipe. Almost impossible to hear speech. Ille is also the famous Sagrada Familia in Barcelona.
A leading German company (Beyerdynamic) in the field of electronic acoustics has developed special microphones and loudspeakers, which in this way make it possible to use the church for the purpose. For a multipurpose auditorium, the level should be about 2 sec for both speech and music. A music room with recording should have a relatively shorter reverberation time for the clarity picture in recording. But in smaller rooms you never get any long reverberation time for natural reasons.
If you do not want to create a plan yourself, there is some consulting firm within the field that can assist with the solution model. You can contact Norsk Akustisk Selskap or you can find a lot of information on NS 8178 - a new Norwegian standard that can be ordered.