A hearing aid helps to overcome defects in hearing.

助听器有助于克服听觉缺陷。

《新英汉大辞典》

The AARP doesn't need a hearing aid manufacturer to function.

AARP的运营不需要一个助听器的生产商。

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It is usually permanent and requires rehabilitation such as the use of a hearing aid.

听力障碍往往是永久性的，需要使用助听器等康复手段。

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The third company that Fay worked for is a hearing aid company called EarLens Corporation.

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It could be a hearing aid, individually tailored to the shape of the user's ear.

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He was recently fitted for a hearing aid -- one toll of being exposed to many explosions.

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