https://www.tidatadocuments.org/perpsim/index.php 

CLICK ABOVE LINK TO SEE WORKING VERSION.

https://www.tidatadocuments.org/psyops-techniques-v2k/

IMHO - Squelching sound is similar to V2K

IT IS A PC PROGRAM DOWNLOADING A DIAL UP CONNECTION - OR V2K PROGRAM TO UPGRADE TO #RNM = Remote neural monitoring

The 56k dialup modem sound

http://lookoutfacharlie.com/