To provide a method for inputting an acoustic signal to an electric device where a function of a loudspeaker is enhanced by functioning as a microphone at the same time and to provide the electric device.

In the method of inputting an acoustic signal to an electric device 1, an acoustic signal, e.g. a sound signal is fed to a loudspeaker 5 belonging to the electric device 1, the loudspeaker 5 transduces the acoustic signal into an electric signal and gives the signal to signal output side 10 of the loudspeaker 5, an output signal of the loudspeaker 5 is compared with an evaluation signal to form a combined signal. The evaluation signal is led out through the input signal of the signal input side 15 of the loudspeaker 5 so as to reduce the effect of the input signal onto the combined signal by depending on a transfer function between the signal input 15 of the loudspeaker 5 and the signal output 10.