Is my laptop listening to me?

Have I been bugged by my laptop?  Who knows.  Yesterday the Chrome Browser by Google was accused of flipping on the internal mike and sending all the audio to Google.  I don't use Chrome, but if Chrome can do it others will do it too.  I dug into the wordy but vague instructions for my HP Pavilion no-model-number laptop.  You can go to Control Panel, find an applet "Sound" and disable the internal microphone.  At least in software.  Who knows what Windows bug will allow hostile code to turn the mike on again?  The internal mike is hidden under a groovy looking perforated panel above the keyboard.  I don't quite fear audio snoopers enough to take the laptop apart and risk breaking something.  I did bother to put a piece of tape over the internal camera lens.