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在临床检查和阻抗测听都无异常发现的病人有的可有明显的(≥10dB)气-骨导间距。除了听力计定标不准等因素外,骨导振动器(骨导耳机)也可能是引起这种异常的气-骨导间距的一个原因。因为骨导振动器不仅发出振动性输出,而且还有经空气放射的成份。作者们测试了B70A,B71和B72三种骨导振动器的经气放射。在4000Hz,经气放射的成
In clinical examination and impedance audiometry were not abnormal findings in some patients may have significant (≥ 10dB) air-bone conduction spacing. In addition to the audiometer calibration is not allowed and other factors, the bone conduction vibrator (bone conduction headphones) may also be caused by this abnormal gas-bone conduction spacing of one of the reasons. Because the bone conduction vibrator not only emit vibration output, but also the composition of air emissions. The authors tested the gas emission from three bone conduction vibrators, B70A, B71 and B72. At 4000Hz, the gas radiation into