Assistive Listening Devices (ALDs)—General Information In one sense, all the early hearing aids were really assistive listening devices. However, assistive listening devices didn't really come into their own until the 1950s when devices other than hearing aids began to be manufactured to help hard of hearing people cope where hearing aids didn't work well. One of the early such assistive devices was the more widespread use of the t-coil in 1950. Another was the strap-on telephone amplifier. A unique one was a vacuum-tube amplified ear trumpet built in 1948. |  | Click picture for larger view | | | | Example of an Assistive Device Click on the "Miscellaneous" button
(on the left), then on "Assistive Listening Devices" to see the details of this
and other assistive listening devices. | | |  | | |
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