Burdo S, Bassi G
Acta Otorhinolaryngol Belg. 1979;33(2):246-53.
The authors wanted to verify the advantages produced by binaural amplification in the loudness and in the speech identification. To value the improvement in speech identification they used the Jerger's test (1976); and to value the loudness improvement they measured, gain characteristics of the aid with monoaural and binaural amplification. They executed the test on 50 hearing aid users, chosen among 10 and 84 years old, suffering from sensorineural bilateral hearing loss between 40 and 80 dB. It results that : 1. The gain obtained by the use of binaural amplification is 5 dB lower than the one obtained by monoaural. 2. The binaural amplification permits a remarkable advantage in speech identification, the advantage is directly proportionated to deafness. The authors conclude that the described test is valid, simple and that it is possible to apply it by cheap instruments.
作者们想要验证双耳放大在响度和言语识别方面所产生的优势。为了评估言语识别的改善情况，他们使用了耶格测试（1976年）；为了评估响度的改善，他们测量了单耳和双耳放大情况下助听器的增益特性。他们对50名年龄在10岁至84岁之间、患有40至80分贝双侧感音神经性听力损失的助听器使用者进行了测试。结果如下：1. 使用双耳放大获得的增益比单耳放大获得的增益低5分贝。2. 双耳放大在言语识别方面具有显著优势，该优势与耳聋程度成正比。作者们得出结论，所描述的测试是有效的、简单的，并且可以使用廉价仪器进行应用。
