Over-the-counter hearing aids could lead to more use and technological advances

Some 37.5 million adults in the U.S. report trouble with their hearing, but only one in five people who would benefit from a hearing aid actually use one. For this edition of Tech Talk with Boston Globe technology writer Hiawatha Bray, we discuss the over-the-counter sale of hearing aids, which began this week, thanks to a new federal law allowing them to be sold without a prescription.