Hopkinson N T, Bilger R C, Black F O
Ann Otol Rhinol Laryngol Suppl. 1977 May-Jun;86(3 Pt 3 Suppl 38):40-8. doi: 10.1177/00034894770860s305.
Audiological testing indicated that all of the subjects had profound sensorineural hearing losses. In 12 of the 13 subjects, this profound hearing loss was bilateral. The 13th subject, however, had useable hearing in his unimplanted ear. Tympanometric testing gave no evidence that implant surgery had disrupted middle ear function.
