儿童高频扭曲产品耳声发射源组件的描述性表征
Laura Dreisbach1, Dawn Konrad-Martin2, Christine Gagner1
1School of Speech, Language, and Hearing Sciences, San Diego State University, CA.
概括
扭曲产品的耳声排放 (DPOAEs) 随着年龄的增长而降低,特别是在更高频率的儿童中. 这一发现对于优化儿科癌症患者的耳毒性监测至关重要.
科学领域:
- 听力学 听力学是指听力学.
- 儿科耳鼻喉科 儿科耳鼻喉科
- 耳声波排放 耳声波排放 耳声波排放
背景情况:
- 扭曲产品的耳声排放 (DPOAEs) 评估耳功能,并监测儿童的耳声毒性.
- DPOAEs具有明显的扭曲和反射成分,从婴儿期到成年期观察到的发育变化.
- 关于儿童期和扩展高频 (EHF) 的DPOAE组件优势存在知识差距.
研究的目的:
- 研究年龄和刺激频率对儿童DPOAE成分强度的影响.
- 在儿科人群中描述DPOAE扭曲和反射组件的发育变化.
主要方法:
- 在较年轻 (3-6岁) 和较年长 (10-12岁) 的儿童中收集DPOAEs,频率从2-16kHz.
- 使用了不同的频率比 (1.1-1.25) 和恒定的刺激水平 (L1/L2 = 65/50 dB SPL).
- 使用深度补偿模拟器对声压水平进行校准,并分析时间波形表示,以估计组件峰值压力和延迟.
主要成果:
- 与较年长的儿童相比,较年轻的儿童的DPOAE成分峰值压力最高,特别是在更高的频率下.
- 对于更高频率的扭曲元件,观察到年龄组之间的延迟差异.
- 儿童之间DPOAE来源的最大差异发生在测试的最高频率.
结论:
- 在儿童中,随着年龄的增长,DPOAE水平会下降.
- 反射辐射似乎容易受到耳变化的影响.
- 包括EHF和可能隔离DPOAE来源可以增强儿科耳毒性监测协议.
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