a device similar in shape to a trumpet(= a brass musical instrument with one narrow end and one wide end), used in the past to help someone hear better
Bell's mother was deaf and needed an ear trumpet.贝尔的妈妈耳聋，需要助听器。
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In the 17th century, hearing aids came in the form of ear trumpets.
One of the museum's exhibits is an ear trumpet Beethoven used after the onset of deafness.
He used an ear trumpet, but that didn't help.
His grandson gave him the news through his ear trumpet.
Perhaps you were expecting an elderly widow with an ear trumpet?