When testing a projector, the room should be completely darkened if possible so that no light disturbs the projection or the result on the screen. This also applies to the walls, ceiling and floors. If possible, they should be dark and not create any reflections.
The test for the operating noise should havecomparable requirements, only in acoustic terms. The room should be designed in such a way that no noise from outside enters the room during the projector test and distorts the result. It therefore makes sense to insulate the room against noise. The microphone should also always be at the same distance from the fan outlet so that there is always the same basis.
In addition to the measurable values, the characteristics of the tester also play a role in the projector test. The human eye perceives differences that a camera would not be able to recognise, especially in the case of subtle image differences. The same applies to hearing. We often perceive subliminal sounds that a microphone would not be able to identify.
