there are three wires 4 and directs sound through a hollow open ended sound tube 6 conventionally see fig2 the receiver 2 is installed in the shell 8 of a hearing aid generally indicated by reference numeral 10 ideally the receiver 2 is held in place by the sound tube 6 and the wires 4 and does not touch the shell 8 if as is shown in fig2 the receiver 2 touches the shell 8 vibration from the receiver 2 can be transmitted to the shell 8 to the faceplate 12 and to the microphone 14 thereby potentially causing feedback while it is possible to wrap the receiver 2 in tape not shown or to insert it into a boot not shown before inserting it into the shell 8 these measures are not certain to adequately damp out the vibration from the receiver 2 to the shell 8 this is because the tape or the boot may not provide sufficient cushioning for the receiver 2 and because the receiver 2 may be too tightly wedged into the shell 8 in accordance with the first preferred embodiment of the invention as illustrated in fig3 a solid foam bead 16 of e g polyurethane or other low durometer elastomer surrounds the receiver 2 the bead 16 may be molded around the receiver 2 and then cured as by heat instead of using a solid bead 16 of foam it may alternatively be advantageous to form the bead 16 as a thin hollow bladder of a low durometer elastomer such as silicone or neoprene filled with an electrically nonconductive fluid such as silicone gel or oil in this instance the bead 16 would be sealed.