Adding Precision To The Initial Hearing Aid Fitting Effect of hearing aid style on hearing levels measured with insert earphones and in situ audiometry. Zero represents the hearing threshold levels obtained with ER-3A insert earphones. ... Access This Document Stapedectomy - Wikipedia, The Free Encyclopedia The world's first stapedectomy is credited to Dr. John J.Shea Jr. who performed it in May 1956 on a 54-year-old housewife who could no longer hear even with a... Read full post here
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