[draken]

hi chaps,

its my 6monthly re-calibration time so i have 1 question. I've heard people say when using a SPL meter to have it pointing directly toward the roof and others say on an angle towards where the roof meets the wall which of these is correct/true and why ?

thanks guys,
Mike.

[dj-dulux]

Its down to the directivity of the microphone and the meter itself. Pointing straight up means that the pick-up pattern in the horizontal plane will be omni-directional, in the vertical plane it will be slightly cardioid due to the physical size of the mic and meter. Therefore as the majority of sound comes in direct from the speakers you point it straight up....

Dupe...

[nowayman]

To get a true reading it will really help you to fix it to a tripod or if you do not have one tape it to a chair or something.

If you just hold the SPL meter in your hand you will get huge discrepancies in the readings.

I had loads of issues with calibrating my system until I was told this. I point my SPL meter straight up by the way.

[draken]

that didnt really answer my question i still dont know straight up or angled ? simple answers please im a but new to HT

[daveh48]

Originally Posted by draken

that didnt really answer my question i still dont know straight up or angled ? simple answers please im a but new to HT

The guide I used stated that the meter should be pointed at an angle upwards to where the front wall meets the ceiling.

Check this out...http://forum.blu-ray.com/showthread.php?t=38765