Qiu W W, Stucker F J
Department of Otolaryngology-Head and Neck Surgery, Louisiana State University School of Medicine, Shreveport, Louisiana 71130-3932, USA. Wqui@LSUMC-sh
Scand Audiol. 1998;27(1):43-9. doi: 10.1080/010503998419696.
Acoustic reflex latency (ARL) has been suggested as an indicator in otoneurological diagnosis. However, limited normative data are available. Conflicting evidence exists regarding the effect of stimulus parameters such as frequency on ARL. In addition, there has been little research investigating the effects of ipsilateral and contralateral stimulation on ARL. In view of these problems, ARL was measured in 30 normal-hearing subjects using 500, 1000, 2000, 4000 Hz tones, low-pass noise, high-pass noise, broadband noise and clicks as activating stimuli. Six parameters of ARL: 10%-on latency, 90%-on latency, 10%-off latency, 90%-off latency, rise time and fall time, were recorded using computerized equipment and analyzed in correlation to the activating frequency and intensity. This study indicated that 500 Hz, 1000 Hz tones, and band noise were more effective in eliciting measurable ARL, whereas 4000 Hz tone and click produced a low percentage of measurable ARL. ARL was shown to increase as the stimulus frequency increased and stimulus intensity decreased. No statistically significant differences were found between the ipsilateral ARL and contralateral ARL.
听觉反射潜伏期（ARL）已被提议作为耳神经学诊断的一项指标。然而，可用的标准数据有限。关于刺激参数（如频率）对ARL的影响，存在相互矛盾的证据。此外，很少有研究调查同侧和对侧刺激对ARL的影响。鉴于这些问题，我们使用500、1000、2000、4000赫兹纯音、低通噪声、高通噪声、宽带噪声和短声作为激活刺激，对30名听力正常的受试者进行了ARL测量。使用计算机设备记录了ARL的六个参数：开启10%潜伏期、开启90%潜伏期、关闭10%潜伏期、关闭90%潜伏期、上升时间和下降时间，并分析了它们与激活频率和强度的相关性。本研究表明，500赫兹、1000赫兹纯音和带噪声在引发可测量的ARL方面更有效，而4000赫兹纯音和短声产生可测量ARL的比例较低。结果显示，ARL随刺激频率增加和刺激强度降低而增加。同侧ARL和对侧ARL之间未发现统计学上的显著差异。
