ACOUSTIC DISTORTION PRODUCTS (ADP) FROM THE EARS OF TERM INFANTS AND YOUNG-ADULTS USING LOW STIMULUS LEVELS
ACOUSTIC DISTORTION PRODUCTS (ADP) FROM THE EARS OF TERM INFANTS AND YOUNG-ADULTS USING LOW STIMULUS LEVELS
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DOI：
10.3109/03005369409086577
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发表时间：
1994-08-01
期刊：
影响因子：
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通讯作者：
RUSSELL, PT
中科院分区：
文献类型：
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作者：
BROWN, AM;SHEPPARD, SL;RUSSELL, PT
先前已经表明，相对低的刺激水平（L（1）= 55，L（2）= 40 dB SPL）从健康成年人的耳朵中引起可记录的ADP水平（Gaskill和Brown，1990）。我们在出生后6天内的健康足月婴儿中使用了相同的刺激水平。这里报告了38名婴儿的结果，他们提供了双耳的数据（总共66名婴儿尝试过）。这些数据进行了比较，从12个成年人，年龄在20至30岁，正常的听力阈值。ADP在频率范围内测量，f（2）（高频音）在1至8 kHz（婴儿）和0.5 kHz至8 kHz（成人）之间，f（2）（低频音）由f（2）/1.225确定。ADP也被测量在一系列不同的刺激频率分离。婴儿耳ADP水平高于成人耳，但差异不显著。已广泛用于成人的约1.2的f（2）/f（1）比对于足月婴儿也是合适的频率分离。
It has been shown previously that relatively low stimulus levels (L(1) = 55, L(2) = 40 dB SPL) elicit recordable levels of ADP from healthy adult ears (Gaskill and Brown, 1990). We have used the same stimulus levels in healthy term infants within 6 days of birth. The results from the 38 infants who provided data from both ears (From a total of 66 attempted) are reported here. The data were compared with those from 12 adults aged 20 to 30 years with normal audiometric thresholds. ADP was measured across frequency with f(2) (the high frequency tone) between 1 and 8 kHz (infants) and 0.5 kHz and 8 kHz (adults) and f(2) (the low frequency tone) determined by f(2)/1.225. ADP was also measured at a range of different stimulus frequency separations. The mean level of ADP was higher in infant than in adult ears but this difference was not significant. The f(2)/f(1) ratio of approximately 1.2 which has been widely adopted for use in adults is also an appropriate frequency separation for term infants.