Soundhawk device sharpens hearing, but not all the time

Soundhawk device sharpens hearing, but not all the time
Those include the cheap $ 20 listening devices hawked on late-night TV commercials, but a step below the audiologist-fitted, in-ear hearing aids that can cost $ 3,000 to $ 5,000. … The battery is supposed to last up to nine hours in active listening mode.
Read more on SFGate

History This Week
1952 The first transistor hearing aid went on sale, the model 1010 manufactured by the Sonotone Corp. January 1 was a busy day! … 1962 The last signals from the OSCAR 1 satellite were received as its non-rechargeable battery failed. 1972 Coordinated …
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