Audio playing device and mobile terminal

Abstract

The invention discloses an audio playing device and a mobile terminal. The audio playing device comprises at least two loudspeakers, wherein sound waves sent by each loudspeaker are coherent waves, a phase difference of the sound waves which are sent by any two loudspeakers and arrive at a first target region is an integer multiple of 2pi, and the phase difference of the sound waves arriving at a second target region is an odd number of pi. Therefore, the coherent phase of the sound waves sent by the loudspeakers in the first target region is long, the sounding power of each loudspeaker is superimposed efficiently, the loudness of the sound in the target region is improved, the sound effect of the region is enhanced greatly, consequently, the peak power of single loudspeaker can be reduced, the user experience is improved, and the energy is saved. The coherence of the sound waves sent by the loudspeakers is cancelled in the second target region, so that the sound in the target region is suppressed, directional propagation of the sound is realized, avoiding of accidental leakage of information is benefited, privacy of a user is protected, and meanwhile other persons are also prevented from being disturbed.

Description

technical field [0001] The invention relates to the technical field of audio playback, in particular to an audio playback device and a mobile terminal. Background technique [0002] Audio playback devices are widely used in equipment such as mobile terminals, computers, televisions, and stereos, and are used to transmit sound when people use the above equipment to make calls, watch videos, and listen to music. The audio playback device sends out sound waves through its loudspeaker to transmit sound. The audio playback device of a mobile terminal usually has only one speaker, and the loudness of the sound it transmits is small. To increase the loudness, it is necessary to increase the peak power of the loudspeaker, thereby increasing energy consumption. Even so, the increase in volume is not obvious, so the sound effect is not good, and it cannot meet people's needs for sound effect. [0003] Two or more loudspeakers are usually arranged in the audio playback devices of equi...

AI Technical Summary

Problems solved by technology

However, due to the lack of consideration of the coherence, cancellation and coherence of the sound waves emitted by multiple speakers, the volume is only doubled, and sometimes the power of some sound waves is offset because of the coherence and cancellation of the sound waves emitted by some speakers. Therefore, The volume boost effect is not obvious

[0004] To sum up, the existing audio playback devices have poor sound effects, the peak power of a single speaker is high, and the energy loss is relatively large

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