Is anyone aware of a way to disable the "beep" sound that occurs when

1) connecting or disconnecting the wall charger or
2) the charge has reached 100%?

This normally would not be a problem. However while charging the 750 overnight, apparently the battery occasionally dips just a tad below 100% then goes back up to 100%, which I suppose triggers the battery full "beep". It is a relatively low volume sound but still can be annoying.

Any suggestions for settings or registry modifications to stop this from happening is appreciated. Thanks.