 This study found that both methods of creating hearing devices, ear impressions and computed tomography, CT scans, were effective in providing similar results. However, there were some notable differences between the two methods. Patients preferred the device created from CT scans in three out of four cases, while the wearing comfort of the transducers was better for the device made from ear impressions. Additionally, the appearance of the device differed depending on the method used. This article was authored by Tadashi Nishimura, Hiroshi Hasoi, Chihiro Morimoto, and others.