If you've been shopping at Bargara Central Shopping Centre recently, you may have come across a rather strange noise.
The noise irritating shoppers is non other than an ultrasonic bird deterrent unit, but only some people have been able to hear the noise.
The deterrent has been put in place to deter swallows that hang around the centre, make a mess of cafe tables and shop front and even swoop people walking through the centre.
While it's annoying to some, it's been keeping the birds away.
The unit has been successful in several other shopping centres, with this one having a suspected defect.