Judging purely by the responses to Ask an Expert, hearing problems are an enormous concern for baby boomers, rivaled only by worries about memory. More than 200 people wrote to this week’s expert on hearing, Neil J. DiSarno. 
Dr. DiSarno is chief staff officer for audiology at the American Speech-Language-Hearing Association, and from 1998 to 2012 was chairman of the department of communication sciences and disorders at Missouri State University.