Phone Amplifiers
Telephone amplifiers allow the user to amplify incoming sounds from 12dB to 40dB. There are telephone amplifiers for corded, cordless and cell phones. Some phone amplifiers have tone control to adjust for clarity of speech.
Most phone amplifiers are made for corded telephones. However, there are many models for cell phones; and some are Bluetooth and some are hard-wired. The cell phone amplifiers work only with t-coil equipped hearing aids.