> There seems to be a large number of us old X-bar Techs who now suffer
>> from hearing loss and we may be able to get workman's compensation to
>> help us with hearing aid costs if we can produce some data for the
>> Workman's Compensation Board.
Years ago a telco employee told us deafness in one ear was common because of heavy use of the phone, such as test sets, headsets, etc. Craft people use such devices to listen for test tones (some of which are loud), noise, etc. Older equipment wasn't as well filtered and there were numerous loud pops as connections were made and broken.
You may wish to consult the telephone pioneers.