I have encountered this before, but ignored it, as the problem was on a pet project of mine and I was willing to tolerate it. Now this started happening at work and I can't find anyone else on the Internet complaining of this.
When I run a Maven build, there are certain unit tests that make the computer issue "beep"s. I am sorry I can't really provide much more info on what I am doing wrong, as I am clueless. I think it's the unit tests that do some I/O. I think it could also be somehow caused by the logging framework. It could be neither of the two guesses.
There are guides on the internet showing me how to disable the beep but I don't want to cure the symptom, rather understand (and remove) the cause.
Surely there are people out there who have experienced the same and could drop a note here with what this turned out to be or how they dealt with it. Any hints/pointers welcome.
It has never happened to me with Maven or unit testing but if you say it maybe related to I/O or/and logging framework then it could be the \a - Bell character being printed in the console.