Adhear Bone Conduction System

Inclusion Criteria: Aims 1 and 2: * Adult English speaking patients who are experienced users of Bone Anchored Implants (BAIs) for the indication of either single sided deafness or conductive hearing loss. * Experienced will be defined as greater than 6 months of device use and no intermittent function of the device within 2 weeks of enrollment. * Subjects will be limited to those who have normal hearing by bone conduction defined as a pure tone average of 25 dBHL or better at 500, 1000, 2000, \& 3000 Hz in at least one ear. Aim 3: * English speaking children 5 to 17 years of age and their primary guardian who present to the clinic for treatment by BAI on a headband device for the indications of single sided deafness or conductive hearing loss. * Subjects will be limited to those who have no prior use of a BAI or bone conduction hearing device, normal hearing by bone conduction defined as a pure tone average of 25 dBHL or better at 500, 1000, 2000, \& 3000 Hz in at least one ear. For those children where this cannot be definitively established, children will be included who display clinical signs of normal bone conduction hearing beyond a reasonable doubt and may include such evidence as (but not limited to): auditory brainstem response, speech awareness thresholds, visual reinforcement audiometry, conditioning play audiometry, CT scans, etc.) Aim 3 a \& b: * Pediatric bilateral or unilateral conductive hearing loss patients who are between the ages of 2 and 17 years of…