Abstract
A hearing aid is provided with a switch that automatically, non-manually switches at least one of inputs, filters, or programmable parameters in the presence of a magnetic field. The magnetic field can be generated by a magnet in a telephone handset. The hearing aid further is programmed based on time-varying characteristics of the magnetic field. Wireless activation or deactivation of the hearing aid is also described. A magnetic field dependant switch turns the hearing aid on or off.
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