ACOUSTIC RADIATION FROM BONE VIBRATORS
ACOUSTIC RADIATION FROM BONE VIBRATORS
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DOI：
10.1097/00003446-198103000-00001
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发表时间：
1981-01-01
期刊：
影响因子：
3.7
通讯作者：
HOLMES, A
中科院分区：
文献类型：
--
作者：
FRANK, T;HOLMES, A
我们的目的是研究4000赫兹骨振动器产生的声辐射对骨传导(BC)测试的影响。在一项研究中，当受试者的耳道未闭塞和闭塞时，使用Radioear B-70A、B-71和8-72振动器获得BC阈值。在另一项研究中，只在耳道入口处对每个振动器和类似感觉水平的空气传导源进行了探针管麦克风测量。这两项研究的结果都被解释为B-70A和B-71产生的声辐射最小。然而，B-72被发现有过多的声辐射，这将足以影响BC阈值并产生无效的高频气骨间隙。
Our purpose was to investigate the influence of acoustic radiation produced by bone vibrators at 4000 Hz on bone conduction (BC) testing. In one study, BC thresholds were obtained with a Radioear B-70A, B-71, and 8–72 vibrator when the subject's ear canal was unoccluded and occluded. In another study, probe-tube microphone measurements were made just inside the entrance to the ear canal for each vibrator and for an air conduction source at comparable sensation levels. Results of both studies were interpreted to indicate that the B-70A and B-71 produced minimal acoustic radiation. However, the B-72 was found to have excessive acoustic radiation which would be sufficient to influence BC thresholds and produce an invalid high-frequency air-bone gap.