Lear Siegler agreed to sell its Audiotone unit.

The Santa Monica-based conglomerate said it signed an agreement to sell its unprofitable Phoenix-based Audiotone unit, which makes hearing aids, to Dalhberg Inc. of Golden Valley, Minn. Audiotone reported sales of $7.7 million for the year ended June 30, 1986. Lear Siegler said that the sale was unrelated to the $2.1-billion corporate buyout announced earlier this month by an investment group led by Lear Siegler managers and the Forstmann Little & Co. investment firm.