For reducing the power consumption of a hearing aid system, an internal or external
hearing aid signal source with a signal line for the transmission of a signal to
a hearing aid amplifier and a control device for the connection and disconnection
of the hearing aid signal source is provided in the hearing aid. A monitoring logic
monitors the signal line and supplies a switch signal to the control device, so
that the hearing aid signal source can be connected and disconnected on the basis
of the switch signal. Each signal source can thus be individually connected and
disconnected without employing additional connections from the hearing aid system
to the signal source.
