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The radio Shack has two small amplifier that are useful. On has an amplifier about the size of a deck of cards that is spoken into and connects to head phones. I find this works very well in the car. I think it was designed for listening to TV. A second one from Radio Shack has a very small microphone with the amplifier about the same size as above, which is held to the ear. Also good for one-to-one conversation. Both of these have mediocre fidelity but do the job. A much better one -- and much more expensive -- is called a Voicette and is made by Luminaid, 8688 Tyler Blvd., Mentor, OH 44060. The amplifier is about 6.5 x 6.0 x 3.0. The microphones come in different styles: clip-on, head set, for example. This is good for conversing with three or four people at a time. It has excellent fidelity and was the best of three that we tried. You may be able to get one for trial. Hope this is helpful.