Experimental set-up for acoustically detected MPI. Permanent magnets made from FeNdB produce a selection field of 5 T μ0-1/m. A solenoid produces a drive field of 2.5 mT μ0-1. The sample of magnetic material is glued to a thin and flexible polymer membrane and attached to a tube. A microphone is mounted to the other end of the tube. The tube with sample and microphone is mounted to a robot to move the sample to defined positions.