Why don't my hearing aids work with the telephone?
People who wear hearing aids often complain that holding the telephone over their hearing aid causes acoustic feedback (squeal). Some hearing aids can be ordered with a telephone switch. Those hearing aids have a coil inside which can pick up the electromagnetic field produced by a hearing aid compatible telephone. Hearing aid compatible means that the receiver in the telephone produces a magnetic field, which can be picked up by the telecoil in the hearing aid and then amplified. With this type of electromagnetic connection, there is no acoustic feedback.
If you have an older telephone in your home or business, you may need to purchase a new phone that will be compatible with the telephone switch on your hearing aid. The next time you purchase a hearing aid, you may want to consider an aid with a telephone switch, or order a hearing aid with circuitry that may be adjusted to keep the squealing to a minimum. Also, some new hearing aids are
Bluetooth compatible with cell phones and other Bluetooth devices.