1 -khz test
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Posted on Mar 14, 2008 05:10 am
MackBarrow
Member Since: Mar 12, 2008
can someone give me an explanation or link on how a 1-kHz test tone helps make setting PA levels easier. I figured there is noise and i guess that can make setting PA levels easier, but i was wondering if there was more to it than that? thnx in advance to anyone who can help.
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pjkPrince CZAR-mingMember
Since: Apr 08, 2004
Mar 14, 2008 08:50 am I don't think it's the 1k tone that's used. I think it's pink noise, or white noise, i can't remember which.
The pink (or white) puts signal throughout the spectrum, then you can turn it up, find a freq that's feeding back, cut that freq a bit, then turn the whole thing up a bit, and do it again. 30 seconds of pink noise, can ring out a room, and give you lots of volume, without nasty feedback areas.
Course, I'm just thinking out loud, others with more accurate details will chime in.
zekthedeadcowEat Spam before it eats YOU!!!Member
Since: May 11, 2002
Mar 14, 2008 09:06 am the 1K tone is typically used for setting the maximum volume on broadcast media...
It's illegal for a broadcast station to be 'too loud' because it will cause them to smear outside of their frequency. So like... a TV station will put in a tape which will have a tone at the beginning.. they'll set that tone to their maximum volume threshold... like -6db ... and expect everything else to be quieter.
a PA tech could use it in a similar manner... though usually a sound check would be more effective and less annoying... pink noise is much more useful...
Mar 14, 2008 11:34 am Zek is 100% correct. 1k is used, because the human ear hears 1k the best. This is why it is used to set max level for broadcast.
Pink noise is what is used calibrating a system. Pink noise is just white noise that is filtered flat. White noise has no weighting to it.
If you are looking to EQ your system flat, go to EAW web site. Download a free demo version of Smaartlive 6. You will need a USB pre, and a measurement mic. Also, you will need an understanding of how Smaart is working. You can find information on that on EAW's site.
Hope this is what you are looking for. If not, we will try help you anyway we can.
Mar 14, 2008 09:46 pm yea that was a good enough explanation (from everybody) since i was told how it applies, thanks for all the input.
