My GP starjet started making a weird noise like dishes knocking eachother

you can hear it here or in the attached zip.
https:// dl.dropboxusercontent.com/u/30378098/dishes.m4a
(remove space please)

It's coming from right back and it's very loud when road is bumpy.
It's like coming from inside the car but I can't really tell.

Already gone to the mechanic everything was ok, springs, absorbers, shields, bolts under the car... everything!
After a lot of hours we couldn't find the source.


Any help appreciated.

Hello and Welcome!
That's easy then.
It's nothing!
Now, assuming the mechanic has missed the cause I'd be looking at anti roll bar drop links, any and all rubber bushes, checking for a broken spring coil, making sure the seat backs are properly locked in and that nothing in the boot is loose.
Check that the hatch closes properly too!
Oh and make sure any exhaust heat shields are secure.
Then of course there may be loose baffles in the rear silencer...

Rear Suspension rubbers top and bottom of springs drop rear axle off shocks unhook abs cable from support first.. Remove springs clean up rubbers Blatter with silicone grease and put back together

Well...here's the source of the problem. Axle silent block. I sprayed some silicone , noise decreased but i'll replace both soon.