On Thu, 13 Nov 2008 23:42:37 +0000, David Woolley (E.L) wrote: >Audio dB are weighted by frequency, so the same power at different >frequencies will not produce a 0dB difference.
The use of weighting requires another suffix. >It's more complex than that. Classical music broadcasters need to >respect dynamic range Of course -- I oversimplified (only slightly) as an exageration of conditions in the US. Here we have VERY few classical broadcasters. AND -- while dynamic range must be respected, it cannot be maintained as a copy of an actual performance because the noise level of the listening environment is simply too high. A symphonic performance on CD can have a dynamic range of 90 dB, but the noise level in most homes is on the order of 50 dBA. 90 dB + 50 dBA = 140 dBA, which is 20 dB more than almost any home stereo rig. And your car is more like 70 dBA. 73, Jim K9YC _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
