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Distortion-product otoacoustic emissions in the common marmoset (Callithrix jacchus): Parameter optimization.

机译:普通mar猴(Callithrix jacchus)中的失真产物耳声发射:参数优化。

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摘要

Distortion-product otoacoustic emissions (DPOAEs) were measured in the common marmoset (Callithrix jacchus), a New World primate. We determined the optimal primary-tone frequency ratio (f2/f 1) to generate DPOAEs of maximal amplitude between 3--24 kHz. The optimal f2/f1, determined by varying f2/f 1 from 1.02--1.40 (using equilevel primary tones), decreased with increasing f2 frequency between 3--17 kHz, and increased at 24 kHz. The optimal f2/f1 ratio increased with increasing primary tone levels from 50--74 dB SPL. When all stimulus parameters were considered, the mean optimal f2/f1 was 1.224--1.226. Additionally, increasing the primary-tone level difference (L1--L 2) by 0, 5, and 10 dB (f2/f1 = 1.21) minimally affected DPOAE strength. DPOAE levels were substantially stronger in females than males and slightly stronger in the right ear than the left. In two aged females (each 5.3 years), DPOAE levels obtained with high frequency primary tones (L1 = L2) were reduced below 1.0 standard deviation of the mean DPOAE level averaged across young females (mean age = 2.28 years). This study is the first to measure OAEs in the marmoset, and the results indicate that the effect of varying the frequency ratio and primary-tone level difference on marmoset DPOAEs is similar to the reported effects in humans and Old World primates.
机译:在新世界灵长类动物的普通PO猴(Callithrix jacchus)中测量了失真产物的耳声发射(DPOAE)。我们确定了最佳的主音频率比(f2 / f 1),以生成最大振幅在3--24 kHz之间的DPOAE。最佳f2 / f1是通过在1.02--1.40之间改变f2 / f 1来确定的(使用等电平的主音),随着f2频率在3--17 kHz之间增加而减小,并在24 kHz处增加。最佳f2 / f1比随着主音调电平从50--74 dB SPL的增加而增加。当考虑所有刺激参数时,平均最佳f2 / f1为1.224--1.226。此外,将原音电平差(L1-L 2)增加0、5和10 dB(f2 / f1 = 1.21)对DPOAE强度的影响最小。女性的DPOAE水平明显强于男性,而右耳的DPOAE水平则略强于左。在两名年龄较大的女性(每人5.3岁)中,以高频一次音调(L1 = L2)获得的DPOAE水平降低到年轻女性(平均年龄= 2.28岁)平均DPOAE平均水平的1.0个标准差以下。这项研究是首次测量measure猴中OAE的研究,结果表明,改变频率比和基音水平差异对mar猴DPOAEs的影响与已报道的对人类和旧世界灵长类动物的影响相似。

著录项

  • 作者

    Valero, Michelle Denise.;

  • 作者单位

    The University of Texas at San Antonio.$bBiology.;

  • 授予单位 The University of Texas at San Antonio.$bBiology.;
  • 学科 Health Sciences Audiology.; Biology Animal Physiology.
  • 学位 M.S.
  • 年度 2008
  • 页码 50 p.
  • 总页数 50
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 耳科学、耳疾病;生理学;
  • 关键词

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