Join Date: Jan 2002
Location: Toronto, Canada
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Great thread, but I have to think there is too much variability here to accurately compare these results. Off the top of my head I can see the following differences amongst users causing issues:
1) Plasma mounted on wall vs on stand - maybe a wall mount helps to block/diminish the sound given the proximity of the plasma to the wall?
2) Plasma located in a room with carpets/drapes vs one with hard floors and uncovered windows
3) People testing buzzing with no volume vs those testing with volume on
4) Some people testing on darker content vs those testing on bright or all white content (ie worst case scenario)
5) Ambient room noise (eg someone next to kitchen with loud fridge, someone with a loud PVR that is always on)
Any of these individually, or in combination, could easily explain differences in people's perception of buzzing. I think it's time this forum came up with an objective approach to testing buzzing, especially since this is a "science" forum. Going forward, I think any testing/reporting for buzzing should include the following:
1) Identify plasma installation - wall mount or stand, and if your room contains carpets/drapes that may absorb the sound
2) Turn off volume on the TV/Receiver. Testing should occur without any programming sound.
3) Turn off all other sources of sound in the room
4) Test primarily on bright content. Putting up an all white slide would probably be best.
Now, if someone was to do all of the above, should they still consider their panel defective if they can hear buzzing from more than a few feet?