Dahlberg went to work for Telex, a company that made hearing aids. In 1948, he founded Dahlberg Electronics, a subsidiary of which is the Miracle-Ear hearing aids manufacturer. By 1959, Miracle-Ear had evolved into a subsidiary of Dahlberg, Inc., with $100 million in annual revenue. A national advertising campaign that Dahlberg, Inc. ran from 1988 until mid-1993 was subject to charges of false advertising by the Federal Trade Commission, which were settled in 1995 when the company agreed to pay a $2.75 million civil penalty. In the summer of 1993, Dahlberg sold his company to Bausch & Lomb for $139 million.