Thornton A R, Bell I E, Phillipps J J
MRC Institute of Hearing Research, Royal South Hants Hospital, Southhampton.
Br J Audiol. 1989 Feb;23(1):63-8. doi: 10.3109/03005368909077820.
Electrostimulation audiometry can provide high-frequency bone-conduction threshold measurements. To evaluate the use of such an audiometer in monitoring hearing, the following areas were investigated. (1) The variability and repeatability of threshold measurements. (2) To see if the instrument could be used on the ward where the patient would have to wear ear plugs to attenuate background noise, the effect of occluding the ears was assessed. (3) The applicability of the instrument to the range of patients in whom monitoring would be appropriate, specifically the relationship between the patient's age and the effective upper frequency limit of the audiometer. The data showed a variability in threshold measurement that is quite comparable with that obtained with conventional audiometry but which became smaller at frequencies of 12 kHz and higher. There was no overall effect on the threshold of occluding the ears, which meant that the instrument can be used to monitor a non-isolated environment such as a ward. The effective cut-off frequency was about 9 kHz for patients aged 55 years, and so the use of an electrostimulation audiometer to monitor high-frequency auditory thresholds is restricted to younger patients.
电刺激听力测定法能够提供高频骨导阈值测量。为评估此类听力计在听力监测中的应用，对以下方面进行了研究。（1）阈值测量的变异性和可重复性。（2）为了观察该仪器能否在病房使用（患者在病房必须佩戴耳塞以减弱背景噪声），评估了耳塞对测量结果的影响。（3）该仪器对适合进行监测的患者群体的适用性，特别是患者年龄与听力计有效高频极限之间的关系。数据表明，阈值测量的变异性与传统听力测定法相当，但在12千赫及以上频率时变异性变小。耳塞对阈值没有总体影响，这意味着该仪器可用于监测病房等非隔离环境。55岁患者的有效截止频率约为9千赫，因此使用电刺激听力计监测高频听觉阈值仅限于较年轻的患者。
