Vesterager V
Department of Audiology, Bispebjerg Hospital, Copenhagen, Denmark.
Scand Audiol. 1990;19(4):251-6. doi: 10.3109/01050399009070780.
The purpose of the study was to perform clinical tests with two BTE-hearing aids (BTE-HAs) having different frequency characteristics--and to correlate the results of the clinical tests to self-assessed use and benefit. The material comprised 16 subjects (SS) (median age: 74.5 years, range: 70-83 years) with moderate, sensorineural hearing losses. Patient selection criteria were specified according to the requirements for amplification at 4 kHz. All SS were fitted with two different types of BTE-HAs which were compared by the SS in a 3-months field study. The effect of the HAs was subjectively evaluated by a questionnaire and objectively by determination of the discrimination score in background noise (DN measurements). Furthermore, the need of amplification was checked by repeated insertion gain (IG) measurements. There was no significant difference in final HA choice. The DN measurements and IG measurements (both measured at most comfortable listening level (MCL] were significantly better with one of the HAs. The conclusion is that a correlation exists between optimal discrimination score in background noise and amplification at 2 and 4 kHz. The objective findings, however, were not reflected in any of the subjective parameters.
该研究的目的是对两款具有不同频率特性的耳背式助听器（BTE-HAs）进行临床试验，并将临床试验结果与自我评估的使用情况和益处相关联。研究材料包括16名中度感音神经性听力损失的受试者（SS）（年龄中位数：74.5岁，范围：70 - 83岁）。根据4kHz频率处的放大要求确定患者选择标准。所有SS均佩戴两款不同类型的BTE-HAs，并在为期3个月的实地研究中由SS对其进行比较。通过问卷调查对助听器的效果进行主观评估，并通过测定背景噪声中的辨别分数（DN测量）进行客观评估。此外，通过重复测量插入增益（IG）来检查放大需求。最终的助听器选择没有显著差异。使用其中一款助听器时，DN测量和IG测量（均在最舒适聆听水平（MCL）下测量）明显更好。结论是，背景噪声中的最佳辨别分数与2kHz和4kHz频率处的放大之间存在相关性。然而，客观结果并未在任何主观参数中得到体现。
