The problem is resolved only after I restart my system. So, it seems some sound buffers are being over-run every time someone switches on a tubelight.
I know this sounds weird but here's my problem -
Recently, whenever someone in my home switches on a tubelight (I am yet to find any other appliance which also causes the problem), my desktop speakers/headphones go mute.
Then, I try to mute them using the volume icon and then increase the volume but it just doesn't help. However, I do hear some static in the background and again, when someone switches on anything , I hear a blip. But no audio.
The problem seems to be occurring only recently since, I started using an audio splitter and a new pair of headphones (The splitter enables me to switch between my desktop speakers and headphones. For listening to the desktop speakers, I simply unplug the headphones and for listening to the headphones I simply switch-off the desktop speakers).
I use a Creative 4.1 Speaker System and a LancerTech soundcard which has 2 audio outputs (front and rear channels).
Any help is welcome.