Sorry to dig up a grave this old but I found an easy solution. The female connector is easily accessible by removing the ear pads and the plastic grill behind. You will see the membrane and a little white plastic clip of sorts from which the tiny wires go to the driver coil. You can pull that out and access two little spring-like parts. If you add a thin (0.2-0.4mm or so) square of plastic or whatever to the side of the spring that doesn't touch the gold plated tube to tension it more, problem solved. It makes the male connectors tighter and a little harder to insert or remove, the intermittent sound is gone though.
