In subjects that have been drinking alcohol, for example, emissions are deadened. And different drugs alter the amplitude of OAEs, as do ear infections or wax build-up.

例如，有饮酒习惯的受试者，其耳声发射就已减弱，不同的药物也会改变耳声发射的振幅，耳道感染或者耳垢堆积也一样。

youdao

Middle ear infections are one of the most common childhood problems.

什么是中耳炎？ 中耳炎是儿童中最常见的疾病之一。

youdao

The result is a lower incidence of respiratory and ear infections, and, with at least four months of exclusive breastfeeding, decreased risk of type 1 diabetes, asthma and eczema.

母乳喂养能降低呼吸道、耳道感染的得病率，另外，四个月以上的只进行母乳喂养的婴儿，得I型糖尿病、哮喘和湿疹的风险也会下降。

youdao

Genetic testing has caused controversy in some cases because of the possibility that parents of an unborn child might choose to abort if they knew it was susceptible to a condition, but Professor Haggard said this was unlikely to be a factor in the case of middle ear infections.

BBC: Ear examination

Knowing that a child was susceptible to middle ear infections because of a family history of the condition would allow parents to control the child's environment, reducing its chances of becoming ill, he said.

BBC: Ear examination

In this column, we'll discuss many aspects of healthy living and answer a wide variety of questions -- ranging from when it's safe to fly with an infant to whether it's normal for adults to get ear infections and how to make the most of your medical visits.

CNN: Learn to live well with CNNhealth