Effects of too-loud music on human ears. But, mother, rock'n roll has to be loud.

From the Audiology Division of the Speech Clinic, Institute for Human Adjustment, The University of Michigan, 1111 East Catherine, Ann Arbor, Mich. 48104. Constant or recurrent exposure to high intensity sound can permanently damage hearing. Pediatricians and otologists are becoming increasingly aware of this danger, especially to teenagers who listen to rock’n roll music and entertainment—"the louder the better." P-TI&dquo;LJLEENAGERS continually expose themselves to possible permanent sensori-neural hearing loss in their fascination with bombastic music issuing from record stores, pop music radio stations and local discotheques. For over a century the professional litera-