Berger K W, Hagberg E N, Rane R L
Ear Hear. 1980 Jul-Aug;1(4):223-5. doi: 10.1097/00003446-198007000-00009.
A one-half gain rule for hearing aid fitting based on the unaided average hearing threshold level was first proposed by S. F. Lybarger. From records on almost 500 clients with sensorineural loss for whom hearing aids were prescribed and fitted, the functional gain for speech reception threshold, 500 Hz, and the average of 1000 and 2000 Hz was examined. The one-half gain rule was found to be valid for speech reception threshold except with mild hearing losses where the gain obtained was a little less than one-half the unaided hearing threshold level. The one-half gain rule is easily computed and provides a good first-order approximation of operating gain needs.
基于未助听平均听力阈值水平的助听器验配二分之一增益规则最早由S. F. 利巴格提出。从近500例被开出处方并验配了助听器的感音神经性听力损失患者的记录中，对言语接受阈值、500赫兹以及1000赫兹和2000赫兹平均值的功能增益进行了研究。结果发现，除了轻度听力损失患者（其获得的增益略低于未助听听力阈值水平的二分之一）外，二分之一增益规则对言语接受阈值是有效的。二分之一增益规则易于计算，并能很好地初步估算所需的工作增益。
