This guide is designed to assist industrial arts teachers in expanding their knowledge of hearing conservation and to enable them to answer some routine questions that their students may have concerning hearing protection and hearing loss. Addressed in the individual sections of the guide are the following topics: industrial arts, hearing protection, and the law; requirements for ear-protecting devices as set forth in the Iowa Code; legal limits for noise exposure; the structure and functioning of the ear; commonly asked questions about the ear; procedures for measuring hearing; noise and hearing loss; audio demonstration of simulated hearing loss; symptoms of hearing loss; procedures for establishing a hearing conservation program; kinds of hearing loss; the effects of noise on hair cells; and sources of help in implementing a hearing program. A bibliography and list of suggested references conclude the guide. (MN)