Method for testing an audio signal system and aircraft comprising an audio signal system

A method for testing an audio signal system having a multiplicity of connection sockets for audio components, each connection socket having at least one audio signal interface connected to a ground interface of the connection socket via a series circuit comprising a resistor and a capacitor, the method having the following steps:

• feeding, by means of a signal processing device, a time domain reflectometry test signal into a wired network of the audio signal system, in which the connection sockets are connected to the signal processing device via electrical lines of different lengths;
• detecting in a temporally resolved manner, by means of the signal processing device, test return signals as time domain reflectometry test signals reflected at the multiplicity of connection sockets;
• comparing the detected temporally resolved test return signals with a temporally resolved reference pattern for test return signals, which reference pattern was created for the audio signal system under predefined boundary conditions;
• and
• determining a faulty connection of a connection socket to the wired network if the step of comparing the detected temporally resolved test return signals with the reference pattern reveals a deviation above a predefined threshold value.