聴覚障害者の聴取能に関する研究

抄録

Studies were made on the relationship between the results of speech discrimination test at the level of daily conversation and of pure tone audiometry and the results of self-ratings of the hearing impaired. The subjects employed were 596 patients with the age ranged between 16 and 69 complaining of hearing troubles in daily conversation. The speech discrimination test was also conducted on 112 out of the above subjects under the conditions of employing the body-worn type hearing aids.
1. The scores obtained in the speech discrimination test were lowered as the threshold for pure tone increased. At the average hearing loss of 50 dB, the scores were sharply lowered.
2. The rate of the cases with poor vowel articulation was high among the patients with scores of syllable articulation less than 60 %. A large deviation was observed in the scores of sound articulation on the patients with the syllable articulation less than 50 %.
3. The degree of hearing handicaps in the cases with the average hearing loss of 50 dB was considered close to that with 60 dB loss rather than that with 40 dB loss.
4. In the speech discrimination test conducted on the patients with body-worn type hearing aids whose average hearing loss was more than 50 dB, delivering test words with 60 phons almost the same results were obtained between the patients with 50 dB of average hearing loss and with 60 dB.