Home Cinema Room Construction
Building your room correctly will ensure that you are getting the best from your hardware. As we stated in Part 2 – Home Cinema Audio Design we really want to keep external noise outside the room and make sure that the sound inside the room is performing at it’s best. There are things that can be done and the construction stage to help.
Keep external noise out by using sound insulation. Sound insulation is achieved by using high mass, thick dense walls and multiple layers. If the project lends itself to building a room within a room then that is the preferred option. Isolating the cinema room from the rest of the property to limit its effects on the cinema experience. Any property near a busy road will be aware of road noise – especially low-frequency rumbles of large vehicles passing and the last thing you want at the moment in a film where the tension has been built to an almost unbearable level, only to have it broken by the sound of a lorry, plane or even the air-con.
Keeping the sound from the home cinema is just as important as keeping the external noises out. Different building materials have different STC codes – Sound Transmission Coefficients – showing how much sound energy gets through. The room should be kept airtight to prevent sound leakage, and so particluar care must be taken with the heating/cooling and ventilation systems – large ducts and soft bends are advisable, and two 90 degree corners between the vents and the heat exchanger unit.