How Highly Focused Sound Waves Steadied A Farmer’s Trembling Hand

(By Jon Hamilton for NPR)

Alan Dambach was in his late 50s when he noticed how unsteady his hands had become.

Over the next decade, his tremor got so bad he had difficulty eating with a spoon or fixing equipment at his family’s tree farm in western Pennsylvania.

“I couldn’t get nuts and bolts to work,” he says.

But it was his deteriorating handwriting that made Dambach decide he had to do something about his tremor. Continue reading article here…

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