Some can be used without a hearing aid. There are many assistive listening devices available today, from sophisticated systems used in theaters and auditoriums to small personal systems. Various kinds of assistive listening devices are listed below. There are several types of personal listening systems available. Some of these systems, such as auditory trainers, are designed for classroom or small group use.
Models are available for use with or without hearing aids.
Many, but not all, standard telephone receivers come with an amplifying coil. This position allows the aid to be used at a comfortable volume without feedback and with minimal background noise. In addition there are specially designed telephone receivers which amplify sound. Or, special amplifying devices can be purchased that attach to a regular telephone receiver. Most of these devices have volume control dials.