1971 Volume 14 Issue 3 Pages 164-168
In 1969, the statistical research of the patients with hard of hearing in Tokyo was be done.
The results are as follows.
1) The number of the deaf in all is about 14, 660 (0.133% of all the people lived in Tokyo).
2) They live in suburbs more than in the center of Tokyo.
3) The patients who are presbycusis are in a ratio of 20-70 to a ten thousand.
4) When we devide the class of hard of hearing, the patients with loss of hearing 90dB in both side of the ear are the most of all of the patients.
5) If we classify by the cause, number of the inborn deaf is the most and next is otitis media chronica.
6) The occupations of the deaf are almost bodily labors.
7) Almost of them don't hope the auditory train for speech.
8) One half of them have hearing aids.
Many patients with deafness are inborn, so we hope to discover and diagnosis them in nursling stadium. Though the deaf children cann't hear “speech”, they ought to learn “language” before school. The patients with disturbance of hearing after 8 years old can speak, but not hearing “language”. So that, they cann't communicate with others, and they are solitary. They are engaged as bodily labors and live with scant income. One half of them have hearing aid, but they don't use it sufficiently. They can hear tones but cann't understand the language. We ought to reconform the system of the auditory training, and inform the probabilities of the auditory training.
