The Sound Saturation Pressure Level of Hearing Aid Suitable for Moderate Hearing Loss
1984 Volume 27 Issue 2 Pages 112-117
Details
1984 Volume 27 Issue 2 Pages 112-117
The most suitable saturation-sound-pressure-level (SSPL) of hearing aids for moderate hearing loss was studied in 341 cases. They consisted of 253 cases of sensorineural loss, 45 of mixed loss and 43 of conductive loss. The selection and adjustment of the hearing aids were performed in hearing aid clinic at our hospital.
In the cases with sensorineural loss, the mean value of the optimal 90dB SSPL were about 105dB in cases of 45-55dB HL, and 110dB in cases of 60-75dB HL. In spite of a small difference between the groups of different hearing levels, individual variations were large within the groups of the same hearing levels. There was no difference of optimal SSPL between the types of hearing aid, and between the cases with different audiograms. In the cases with conductive and mixed hearing losses, the mean of the optimal 90dB SSPL were about 5dB higher than those of the sensorineural loss at each hearing level. The results provide useful data for the selection of hearing aid and the adjustment of SSPL to an individual case.
