Voice frequency directional processing method and voice frequency directional processing device

Abstract

The invention discloses a voice frequency directional processing method and a voice frequency directional processing device. The voice frequency directional processing method comprises the steps of receiving typed-in user quantity and user position information; using a stereophonic sound modulating mode to modulate each route of voice frequency signal to an ultrasonic signal pointing to the same user when the user quantity is one; using a single track modulating mode to modulate the i route voice frequency signal to an ultrasonic signal pointing to the i user when the user quantity is larger than one and smaller than or equal to the number of ultrasonic transducers; using a surround modulating mode to modulate each route of voice frequency signal to an ultrasonic signal pointing to sound wave reflecting faces above the user and / or on two sides of the user when the user quantity is larger than the number of the ultrasonic transducers; and outputting each route of ultrasonic signal to a corresponding ultrasonic transducer. The non-linear propagation effect of ultrasonic waves in the air is used, and according to the actual quantity and the specific position information of the users, different voice frequency playing effects are decided, and the high directivity of audible voice frequencies is effectively improved.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to an audio directional processing method and device. Background technique [0002] Along with the years of development of sound equipment such as TV sets, existing broadcasting methods have been well known by consumers. In most audio equipment, electrodynamic speakers are usually used, that is, the effect of a magnetic field on a current-carrying conductor is used to realize electroacoustic energy conversion, such as a dynamic speaker. This traditional design method is poor in directivity because the sound field of the audio equipment radiates to all directions of the space when the user listens to the program, and the entire room or the entire broadcasting environment is full of sound. For example, when A is watching a TV program and B is doing other activities, such as surfing the Internet, reading books, etc., and B does not want to be disturbed by the TV program, the...

AI Technical Summary

Problems solved by technology

This traditional design method is poor in directivity because the sound field of the audio equipment radiates in all directions of the space when the user listens to the program, and the entire room or the entire broadcasting environment is filled with sound.

For example, when A is watching a TV program and B is doing other activities, such as surfing the Internet, reading books, etc., and B does not want to be disturbed by the TV program, the existing solution is that B leaves the room where the TV program is played, or A reduces the volume of the TV Or use earphones, but this way will bring great inconvenience to the user, or affect the normal viewing of TV programs by the user

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