Sleepy reminder: Wear the ear, turn on the switch, when you want to sleep, put head to lower 20 degrees and it will shake to ensure your driving safety.

戴在右耳上，打开开关，当您瞌睡时，头部低下20度左右的时候，就会发出蜂鸣，确保您的行车安全。

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The proposed idea would convert speech to text and back, using the switch to remove any unusual pronunciation or too-quick talking before it reaches the listener's ear.

ENGADGET: Apple seeks patent for hearing aids that deliver speech at an even keel