When I open lights in my room and my pc is on,I hear a "pop" sound from the speakers.Why?

Answer 1

I believe your speakers would either be connected to an amplifier or is connected to a power source (which means it has its own amp). Either way, that small jolt the PC receives (no matter how small) when you turn on the lights will travel though the audio device of the PC, then gets amplified, then you hear the pop.

Answer 2

I am going to differ with some of the previous answerers. The current drain resulting from turning on a single light in the house is probably not great enough to make a noise in the speakers. In addition, the signal being sent to the speakers does *not* come from the outlet in the wall; it comes from whatever the speakers are plugged into (cd player, etc). The power from the wall outlet is just to amplify the signal coming from the audio source. What is really happening is that when you turn on a light, a current begins flowing in the wires going to the light. This creates an electromagnetic field that begins pulling on the electrons flowing in the speaker cables, which interferes with the audio signal. To fix this, you might try getting a better audio cable with better shielding, which protects the speakers from outside electromagnetic interference. This is the same thign that is happening when you place your cell phone next to the speakers and you hear strange humming noises (because the cell phone is constantly sending and receiving electromagnetic signals). Also, you can notice the same effect when listening to AM radio during a thunderstorm (lightning creates an electromagnetic pulse which is picked up by your antenna and is translated to a momentary bit of noise).

Answer 3

Because electricity creates electromagnetic waves...when you flip the lights on, more electricity is required to heat the element in the lightbulb so more flows through the element at the start. This creates an electromagnetic pulse that is picked up by the coil in the speakers and heard by you as a "pop"!

Answer 4

The electricity needed to light the lights causes a momentary drop in the AC line voltage that is passed through the electrical wiring. It is then perceived as a "pop" when the speakers' amplifier have a drop in their operating voltage.

Answer 5

You're creating an electircal surge in the power lines when you flip the light. The slight change in current to the speaker creates a little poping sound.

Answer 6

It's the change in current in the power lines running through your house. Buy a voltage isolator @ home depot or similar.

Answer 7

When I hear the words Ding, Ding. I visualize someone trying to get your attention when you're not listening to what they are saying. Almost like saying "Hello, anybody there listening to me ?"

Answer 8

They're teeny~tiny power surges...don't worry it wont affect you!
Sharing electricity with one another, it is like a little *high five* greeting... between your lights and your PC! (smiling)

Answer 9

Its nothing to worry about,it what they call mains born electrical interference going through the speakers.I get it every time my fridge and freezer switch on and off.