 The investigators have been treating patients recently by placing some putty like clay material on the eardrum, which stops it vibrating so much with the patients own voice, and this appears to be quite effective for many patients. It is also easily removed if the patient does not find it helpful. However, the investigators do not really have a good idea of exactly which patients are helped by this, and which are not, and just how much their symptoms are helped, as well as how long the treatment helps them for. 