【摘要】 在扩散声场中，应用探管传声器系统测量了１５人３０耳在扬声器分别取０°（参考点）、±１５°、±３０°、±６０°和±９０°各方位角（θ）时的真耳非助听响应。结果表明：各位置同参考点鼓膜处声压级之差随θ和测试频率而异，差异主要发生于θ＞±３０°和２ｋＨｚ以上频率；如频率≤６ｋＨｚ，θ在－３０°～３０°之间，则由于θ改变所致的误差可控制在３ｄＢ以内。由此认为，扬声器方位角是引起真耳测量结果变异的重要变量之一，临床声场测听和介入增益测试过程中，如参考点取０°方位角，则受试者头部容许的最大动度范围应严格限于±３０°更多还原

【Abstract】 Real ear unaided response were obtained from 30 normal ears at 0°,±15°、±30°、±60°and±90° loudspeaker azimuths(θ) with probe tube microphone system.Sound pressure level(SPL) difference to the reference point was found to be the function of θ and stimulus frequency.Most of the difference appeared at θ above ±30° and at frequencies over 2 kHz.SPL variance was below 3 dB for frequencies equal to or below 6 kHz and θ between ±30°.The results suggest that location of loudspeaker is of very importance in real ear measurement.During sound field audiometry and hearing aid fitting,the subject’s head should be restricted within±30°.更多还原