Somebody can have a look then.
A possibility: you installed a pop-up blocker and configured it to ping when it blocks a popup.
What's your browser (Firefox, IE?) and what antimalware, ad- and popup-blockers do you have installed?
This is not a technical question. I have noticed that on on a few websites that I have gone to for information that a "pinging" sound is heard. I have run across it a few times and would like to know what it is. My spyware and popup blocker do not pick it up and I do not notice any ads on the sites that would cause this "ping". Any ideas as to what it is and why? It reminds me of a sonar "ping" in a submarine.