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ear moulds / ear inserts

michael_forrest michael_forrest at lineone.net
Fri Mar 13 01:30:13 EST 1998

Any ideas how often these have to be replaced (ie ear canal changes shape
enough for the old mould to not fit any more)?

Context is individually moulded ear plug, as hearing protection, rather
than hearing aid (but the same problem, I imagine, except possibly that
hearing protection users might on average be a younger age group). 

Mike Forrest

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