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首页> 外文期刊>Hearing Research: An International Journal >Distortion-product otoacoustic emissions in the common marmoset (Callithrix jacchus): parameter optimization.
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Distortion-product otoacoustic emissions in the common marmoset (Callithrix jacchus): parameter optimization.

机译:普通mar猴(Callithrix jacchus)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 a New World primate, the common marmoset (Callithrix jacchus). We determined the optimal primary-tone frequency ratio (f(2)/f(1)) to generate DPOAEs of maximal amplitude between 3 and 24 kHz. The optimal f(2)/f(1), determined by varying f(2)/f(1) from 1.02 to 1.40 using equilevel primary tones, decreased with increasing f(2) frequency between 3 and 17 kHz, and increased at 24 kHz. The optimal f(2)/f(1) ratio increased with increasing primary-tone levels from 50 to 74 dB SPL. When all stimulus parameters were considered, the mean optimal f(2)/f(1) was 1.224-1.226. Additionally, we determined the effect of reducing L(2) below L(1). Decreasing L(2) below L(1) by 0, 5, and 10 dB (f(2)/f(1)=1.21) minimally affected DPOAE strength. DPOAE levels were stronger in females than males and stronger in the right ear than the left, just as in humans. 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:在新大陆灵长类动物-普通mar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(f(2)/ f(1)),以生成最大幅度介于3和24 kHz之间的DPOAE。最佳f(2)/ f(1),是通过使用等电平的主音将f(2)/ f(1)从1.02更改为1.40来确定的,随着f(2)频率在3至17 kHz之间的增加而降低,并在24 kHz。最佳f(2)/ f(1)比率随着原音电平从50 dB到74 dB SPL的增加而增加。当考虑所有刺激参数时,平均最佳f(2)/ f(1)为1.224-1.226。此外,我们确定了将L(2)降低到L(1)以下的效果。将L(2)降低到L(1)以下0、5和10 dB(f(2)/ f(1)= 1.21)对DPOAE强度的影响最小。与人类一样,女性的DPOAE水平比男性要强,右耳的耳朵要比左耳强。这项研究是第一个测量mar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。

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