To overcome the limitations of monaural hearing resulting from a subtotal petrosectomy and blind sac closure by fitting of a behind-the-ear hearing aid. Three patients were fitted with aids. Patient satisfaction and the decision to buy the aids were recorded. Three patients reported good hearing result despite the absence of the middle ear structures. For patients troubled by the limitations imposed on hearing with a unilateral conductive loss following a subtotal petrosectomy and blind sac closure, a behind-the-ear aid is a simple and easy option to try, if the residual canal allows fitting of the aid.