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Devices designed to improve hearing that are sold without a prescription are known as personal sound amplification products, or PSAPs, and are much less expensive than prescription hearing aids.

It turns out that some PSAPs are just as good as a prescription hearing aid, while others are not, according to independent tests comparing the prescription hearing aid Oticon Nera 2 to the following PSAPs: Sound World Solutions CS50+, Soundhawk, Etymotic BEAN, Tweak Focus, and MSA 30X Sound Amplifier. Sign in to read the full answer showing how the brands stack up >>

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