#$%^&*AU2017100347A420170427.pdf#####10 Abstract An apparatus for inducing a change of air pressure in a persons external ear canal. The apparatus includes: 5 - an elastically resilient bellows including a hollow central cavity, - a longitudinally-rigid tube extending from said bellows, the tube having: - a proximal end at said bellows, - a tip at its distal end, and - its hollow core in communication with said cavity, and 10 - mounted on said tip, a soft resilient earpiece, of a size suitable for sealing around the outer portion of said ear canal, and having a bore therethrough in communication with said hollow core. The bellows has a maximum displaceable volume of air of no greater than 6 ml when depressed by a users fingers. 1522 1aa 26a FIG. 1 2 6----- ... ... FIG. 2 28 22 26 FIG. 3 7e FIG. 4 2322 FIG. 5
