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An audio fixed-point delivery method based on an ultrasonic wave

A delivery method, ultrasonic technology, applied in business, instruments, data processing applications, etc., can solve problems such as audio leakage

Active Publication Date: 2019-02-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In view of the fact that the existing ultrasonic-based audio delivery can only achieve directional delivery, and there is an audio leakage problem, the present invention further proposes an ultrasonic-based audio fixed-point delivery method, which further improves the accuracy of audio fixed-point delivery and user experience

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  • An audio fixed-point delivery method based on an ultrasonic wave
  • An audio fixed-point delivery method based on an ultrasonic wave

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0017] The method of the present invention uses two ultrasonic arrays to send modulated 40kHz ultrasonic signals and original 40kHz ultrasonic signals respectively, utilizes the mutual demodulation effect of ultrasonic waves in the air, and realizes fixed-point delivery of audio at the intersection of ultrasonic waves, such as figure 1 shown.

[0018] The method can use two 10×10 ultrasonic arrays, and each point on the array is an ultrasonic probe with a frequency response of 40 kHz. The ultrasonic array is equipped with an all-round electric pan / tilt, which can control the left and right, up and down rotation of the ultrasonic array, so as to realize the fixed-point delivery of audio at any position, such as figure 2 shown.

[0019] Ultrasonic array No. 1 in the two ultrasonic arrays sends unmodulated original 40kHz ultrasonic signal u 1 (t), ...

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Abstract

The invention discloses an audio fixed-point delivery method based on an ultrasonic wave, which comprises the steps of modulating an audio signal to an ultrasonic signal, sending out through two ultrasonic arrays, and realizing audio fixed-point delivery by utilizing mutual demodulation effect of ultrasonic waves in air. Compared with the existing all-directional audio delivery method, the methodmakes use of the directionality of ultrasonic, and can realize the audio delivery of a specific location, thereby avoiding interference to the users in other locations. Compared with the existing audio delivery method based on ultrasonic wave, the method modulates different ultrasonic signals through two ultrasonic arrays, realizes audio delivery at fixed point instead of traditional directional delivery, avoids audio leakage existing in the traditional directional delivery, and improves user experience.

Description

technical field [0001] The invention belongs to the technical field of emerging industries, and relates to an ultrasonic-based audio fixed-point delivery method. Background technique [0002] With the continuous development of technology and economy, fixed-point audio delivery has become a need. Audio fixed-point delivery can be widely used in application scenarios such as advertising, museum explanations, and music playback. For example, shopping malls can place fixed-point advertisements according to the product area where customers are located. Compared with the traditional all-region, indiscriminate advertisement, this method can simultaneously place different advertisements for customers in different regions without causing mutual interference. , which improves the pertinence of advertising and user experience, and has a strong market demand. In view of the fact that the existing ultrasonic-based audio delivery can only achieve directional delivery, and there is an au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q30/02
CPCG06Q30/0251
Inventor 徐文渊冀晓宇程雨诗
Owner ZHEJIANG UNIV