2020 Volume 63 Issue 1 Pages 47-54
We have developed a simplified measuring system using an android device and a small speaker for hearing-aid adaptation tests, to measure parameters of sound field audiometry and the speech intelligibility test and the frequency response curve of hearing aids. In this paper, the measurement accuracy using this simplified system of parameters of sound field audiometry and the speech intelligibility test were evaluated in subjects with sensorineural or mixed hearing impairment with hearing amplification. The measurements in the audiometry and the speech intelligibility test were conducted with both an audiometer placed in a sound-proof room and our simplified system in an examination/treatment room. A total of 35 subjects participated in the sound field audiometry and 19 subjects in the sound field speech intelligibility test. The results showed that there were no differences in the results obtained between the measurements conducted with the audiometer in a sound-proof room and the measurements conducted using the simplified system in a treatment room. Thus, the simplified system showed adequate performance for hearing-aid adaptation tests under the condition of a background noise level of 60 dB(c). Furthermore, the results suggested that it was possible, by using the simplified system, to conduct the adaptation tests at a low cost and in a small space, without the need for a large-scale measuring device.
