Method for the identification of an earpiece, hearing aid system and earpiece set

A method for the identification of a receiver belonging to one of a plurality of receiver types in a hearing aid system, the method comprising the following steps:

• supplying an electrical input signal to the receiver for sound output;
• defining the input signal as a primary signal, and generating a secondary signal in dependence on the input signal based on the sound output;
• using a sensor to capture the secondary signal and using the sensor to generate an electrical sensor signal in dependence on the secondary signal;
• carrying out a phase measurement by determining a phase difference between the input signal and the sensor signal;
• identifying the receiver by assigning the receiver to one of the plurality of receiver types based on the phase difference;
• providing the receiver with two signal contacts;
• using the signal contacts to connect the receiver with reverse-polarity protection to a hearing device of the hearing aid system;
• and
• providing a difference between a first receiver type and a second receiver type of the plurality of receiver types by configuring the receiver types with mutually opposed reverse-polarity protection, for generating two phase differences by a receiver of the first receiver type and by a receiver of the second receiver type differing by 180°.