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A Method of Audio Fixed-point Delivery Based on Ultrasound

A delivery method and ultrasonic technology, applied in data processing applications, instruments, computing, etc., can solve problems such as audio leakage, achieve the effect of improving user experience and solving audio leakage problems

Active Publication Date: 2022-02-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A Method of Audio Fixed-point Delivery Based on Ultrasound
  • A Method of Audio Fixed-point Delivery Based on Ultrasound

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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 ultrasonic waves. The audio signal is modulated onto the ultrasonic signal, sent out through two ultrasonic arrays, and the audio fixed-point delivery is realized by utilizing the mutual demodulation effect of the ultrasonic waves in the air. Compared with the existing omni-directional audio distribution method, this method utilizes the directionality of ultrasonic waves, which can realize audio distribution at a specific location and avoid interference to users in other locations. Compared with the existing ultrasonic-based audio delivery method, this method modulates different ultrasonic signals through two ultrasonic arrays to achieve audio fixed-point delivery instead of traditional directional delivery, and avoids the audio leakage problem existing in traditional directional delivery, thereby improving 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 Patents(China)
IPC IPC(8): G06Q30/02
CPCG06Q30/0251
Inventor 徐文渊冀晓宇程雨诗
Owner ZHEJIANG UNIV