[direwolf-pgh]

EMI/RFI

http://en.wikipedia.org/wiki/Radio_f...y_interference
http://en.wikipedia.org/wiki/Electromagnetic_radiation

http://www.hydrogenaudio.org/forums/...://t17212.html

There are three distinct signatures in the sources used in the original source. Each can be seen clearly in spectral analysis. A 16khz spike can be seen in two of them, one having a lower B/W of approximately 10khz, and the other have a B/W of appoximately 16khz. The third has the same 16khz B/W but without the 16khz spike. The 16khz spike is, likely, due to CRT Horizontal EMI during the recording process.

http://db.etree.org/shninfo_detail.php?shnid=32875