Parving A, Christensen B
Bispebjerg Hospital, København.
Ugeskr Laeger. 1990 Oct 22;152(43):3161-4.
The present article was undertaken to illustrate the frequency of defective hearing in adult mentally retarded persons living in their homes in the Municipality of Copenhagen. The investigation concerns 115 persons, 57 men and 58 women with an average age of 38 years, range 20-79 years. At the time of the investigation, the persons examined constituted 26% of the total population of adult mentally retarded persons living at home in the Municipality of Copenhagen. The investigation revealed that 5% experienced problems in hearing in quiet surroundings while 15% had hearing problems with background noise. On the basis of pure tone audiometry, normal hearing was found in 60% (less than or equal to 20% dB HL) with frequency criterion including 4 kHz, while 67% (77/115) were found to have normal hearing without including 4 kHz in the frequency criterion. In other words, 40%/33% had defective hearing and were therefore outside the normal range. In order to assess the presence of defective hearing, the limit of greater than or equal to 25 dB HL in the ear with best hearing and the frequency criterion with or without 4 kHz, respectively, was established. On the basis of these criteria a reduction of hearing in the best ear of 30%/24% was found. the investigation revealed, in addition, that at least 17% should have been treated with hearing aids but only one of the persons examined had a hearing aid which was, however, not in use. (ABSTRACT TRUNCATED AT 250 WORDS)
本文旨在阐明居住在哥本哈根市家中的成年智障人士听力缺陷的发生率。该调查涉及115人，其中57名男性和58名女性，平均年龄38岁，年龄范围为20至79岁。在调查时，接受检查的人员占居住在哥本哈根市家中的成年智障人士总人口的26%。调查显示，5%的人在安静环境中存在听力问题，15%的人在有背景噪音时存在听力问题。根据纯音听力测定，在频率标准包括4kHz时，60%（小于或等于20dB HL）的人听力正常，而在频率标准不包括4kHz时，67%（77/115）的人听力正常。换句话说，40%/33%的人存在听力缺陷，因此不在正常范围内。为了评估听力缺陷的存在，分别确定了听力最佳耳中大于或等于25dB HL的限值以及有或无4kHz的频率标准。基于这些标准，发现最佳耳的听力下降了30%/24%。此外，调查还显示，至少17%的人应该佩戴助听器，但接受检查的人中只有一人有助听器，不过并未使用。 （摘要截短为250字）
