Currently, most atresic children are offered one of two amplification choices: a body worn hearing aid using a vibratory transducer mounted on a spring steel band worn over the head; or, a Behind-The-Ear hearing aid and vibratory transducer independently mounted on a spring steel headband. Atresic children who have undergone reconstructive surgery are also usually offered these same choices rather than standard hearing aids. For much of the reconstructive process (particularly in the initial phases) the children have well formed ear canals, but have only the underlying structure of a pinna. Their hearing losses require more power than is available in an In-The-Canal hearing aid, and they are unable to wear a Behind-The-Ear Hearing Aid in a post-auricular position. Our challenge was to design and fit a device which helps to overcome the physical discomfort and social stigma felt by these children who have no choice other than to wear an "ungainly" bone conduction device. Our solution is a high power digitally programmable Behind-The-Ear hearing aid located inside a baseball style cap - the "Hearing Hat". This poster describes the development of the hearing hat, the fitting protocols adopted, the acoustic performance of the amplification system, and its acceptability to the children who use it. The poster describes future applications for the hearing hat, including its potential for use in situations such as for ears with recurrent otitis-media, and as an alternative to standard devices where preferred for reasons of comfort or cosmetics.