The objective of this study is to provide a basic data for promoting use of hearing aids (HA) and associated satisfaction among the patients who need hearing aids clinically. 

The contents are as follows: 1) the current status of hearing aids use in Korea was investigated by using secondary data such as Korean National Health and Nutrition Examination Survey (KNHANES) IV, National Health Insurance Corporation (NHIC) data, and so on. Also hearing aids cost in Korea and abroad has been compared; 2) a survey on patients with sensorineural hearing loss ( 30 dB) and age 50 years old was performed to solicit patients' satisfaction and to identify barriers on hearing aids use; 3) a systematic review on domestic and international literature were used to compare the effect of hearing aids by each type and whether it is possible to recommend a type of hearing aids for a specific patient group.