Looking closely at the acoustic treatmentof the studio room I have made, I realised that the room would need five basstraps covering all corners of the room as a way of making sure that when soundtravels through into the acoustically treated areas, they are not containedbouncing from wall to wall in the enclosed areas. This could potentially causethe sounds to combine together and create a washed tone within the room. The bass traps I selected to use inthe studio are porous absorbers. These bass traps are comprised of densematerial and absorb certain aspects of sound waves that come into contact,decreasing the amount of energy from the soundwaves so that they are very faintby the time they arrive at the person listening. These dense materials containsmall pores within them, which then allow certain few of the waves to getthrough.
As the materials that are used are so compact, the sounds becomefrigid and deplete within the trap. Foam bass traps in the room would be usedas they are particularly well-put together and would work well at reducing theunwelcome low frequencies that bounce within the corners of the room.When deciding on which acousticpanels to apply in the room, I considered the reflection and how much of it Iwould need to keep in my studio.
Reducing reflection too much would only end upgiving a flat, almost dead sound, the room will bear no type of character tothe sound in it. As stated by Everest & Pohlmann;”Sound emanates from the sourceradially in all directions. Direct sound from the source moves past you, andnever returns.” I decided that a few meter squarepanels placed in the room will cut out the important reflection points, whilestill letting a suitable amount of natural room reverb and reflection toremain. Placing a 2 by 2-meter acoustic panel on each of the walls within theroom would reduce enough of the reverberation sound, as it is only present insmall sections, there will then still be enough wall space to let the soundsbounce.
The acoustic panels of the roomwould be home-made, it will be constructed using fibreglass. Fibreglass is alight material, it can be made strong and stable once fused together. This isthe best decision for acoustic panels on the walls. Everest & Pohlmannstate; “Cotton and many open cell-foams(such as polyurethane and polyester) are excellent sound absorbers because oftheir open-cell porosity that allows cells to penetrate the material.” Multiple layers of fibreglass sheets will befused together, so that they are around 3-5cm thick. The sheets are thickenough to absorb sound considerably well, without consuming too much space withinthe room. The fibreglass panels will be covered in cloth.
This further helpsabsorb the sound.To give the best effect, the panelsneed to be positioned correctly, the listening position of the room iscalculated as a third from the back wall. Thus, the panels are required to betwo meters away from the window at the far back of the room. The panels areplaced on the left and right walls from the same height as the monitors, thisis so that the sound is reflected at the perfect height. The middle section ofthe back wall, which is two meters high, and therefore an acoustic panel isplaced that was in the middle of the back wall, but 2 meters away from it. Thisis directly above the listening spot and will remove any reflection within thespace. To limit the sound more. Firstly, Acurtain over the back window.
As glass is extremely reflective, this can causeissues with the sound bouncing towards the monitors. When deciding on the monitors forthe studio, you need to consider the placement of the setup. As the DAW is setup against a wall the best option would be to use front-ported monitors, asusing rear ported would let sounds escape from the back and instantly reflect fromthe reverse wall. This would then cause instant reflection problems. For echo’s to be heard within aroom, Sounds have to reflect and come back to the listener within 360ms. Forsound to form a noticeable amount of reverberation, sound has to come back tothe listener within 100ms.
The formula that is used to work out the time is D/S=T(Distance over Speed = Time). Thus, the formula used is 12m (distance of theroom and back) / 340m/s = 35ms. This results in the sound not creating anynoticeable reverberation or echo’s.