Starkey Equalizer The Starkey Equalizer was made by the Starkey Laboratories, Inc. of Eden Prairie, Minnesota in 1991. The Equalizer was a fountain-pen sized tone generator. It measured 5⅞" long. The main part of the body was ⅝" in diameter with the speaker end ¾" in diameter. The Equalizer only weighed 1½ oz. with batteries.
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| The main part of the body showing the Starkey Equalizer name and its use (Make sure your aids are adjusted evenly).
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| The speaker end of the Starkey Equalizer. To use, you held the Equalizer 2 to 3 inches from each hearing aid in turn. If the tone sounded the same volume in both ears, your aids were adjusted properly. If one was louder than the other, then you adjusted the volume on your hearing aid until it matched the other one. This way you could ensure that both ears were hearing sound equally which gave you the best binaural hearing possible. |  | Click picture for larger view | | | |
| The Starkey Equalizer used the pocket clip as the on-off switch. Pressing on it closed the contact and turned the unit on for as long as the clip was pressed. |  | Click picture for larger view | | | |
| The Starkey Equalizer pulled apart to access the battery compartment. It used two AAA batteries. |  | Click picture for larger view | | | |
| The bottom end of the Starkey Equalizer. You can learn more about the Starkey Equalizer and how it worked by reading the papers filed with the patent application. Patent No. 5,081,441 was granted on January 14, 1992.
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