Sound masking method and device and terminal equipment

The invention discloses a sound masking method and device and terminal equipment. When the terminal device uses the receiver as the output end of the audio signal, the masking sound signal is determined based on the audio signal, and then the masking sound signal is emitted through the loudspeaker. The masking sound signal is determined according to the audio signal, and the distance difference between the loudspeaker and the receiver relative to the far field is small, so that the masking sound signal can better mask the sound leakage of the receiver, and the information leakage in the call voice is prevented. Besides, as the masking sound signal and the sound signal are respectively output by the loudspeaker and the receiver, when the listener listens to the sound signal through the receiver, the distance difference between the loudspeaker and the receiver and the ears of the listener is large, the interference of the masking sound signal on the listener to listen to the sound signal is small, and the call