Method for canceling unwanted loudspeaker signals

Method for canceling unwanted signals according to anyone of the preceding claims, characterized in that, while known unwanted signals from the at least one external sound source are suppressed, unknown unwanted, particularly environmental noise signals are reduced by deriving from the microphone signals further signals which, after being converted into sound signals represent in anti-phase said unknown unwanted signals.

Method for canceling unwanted signals from at least one external sound source, according to anyone of the preceding claims, characterized in that, while unwanted signals from the at least one external sound source are suppressed, a further audio input signal is supplied to the headphones and a correction signal is applied to the microphone signal, said correction signal being derived from said further audio input signal such that the corrected microphone signals are still minimized or become still substantially zero.

Sound reproducing system, for applying the method of any one of the preceding claims, comprising headphones with sound generating means and with microphones, and control means, the control means being provided with a filter device to control the sound signal generated by said sound generating means to simulate at least one external sound source in response to a known audio input signal and with regulation means to regulate said filter device such that the signals supplied by the microphones and fed to the control means are minimized or substantially zero when said known audio input signal is also supplied to said at least one external sound source.