Acoustic system

An acoustic system and ultrasonic technology, applied in the direction of frequency/direction characteristic device, etc., can solve the problems of occupying space and the number of components, and achieve the effect of saving space and reducing the number

Inactive Publication Date: 2013-11-20
AAC TECH NANJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the acoustic system of this structure needs to use other audio devices to realize the output of the audio signal. The number of devices used in this structure is relatively large and it takes up space

Method used

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  • Acoustic system
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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1 Shown is a system block diagram of an embodiment of the acoustic system of the present invention, the acoustic system has the function of gesture recognition, which includes:

[0028] The audible audio application module is used to send out audio signals, and the audio signals are generally lower than 18kHz;

[0029] an audible sound segment audio signal mixer, configured to receive and output the audio signal mixed by the audible audio application module;

[0030] Ultrasonic segment processing module 10 and ultrasonic signal transmitter group, described ultrasonic segment processing module 10 is used for controlling described ultrasonic signal transmitter group to send ultrasonic signal, and described ultrasonic signal transmitter group is a continuous wave generator, and the ultrasonic signal transmitter group that sends The ...

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Abstract

The invention provides an acoustic system which is provided with an audible audio application module, an audible sound band audio signal mixer, an ultrasonic band processing module, an ultrasonic signal transmitter group, an adder, a digital/analog converter, a power amplification module, a loudspeaker, a microphone, a microphone signal amplification module, an analog/digital converter and an audible audio filter module. According to the acoustic system disclosed by the invention, the loudspeaker can be used for playing audio files and can also be used as a transmitting unit of the ultrasonic band processing module.

Description

【Technical field】 [0001] The invention relates to an acoustic system, in particular to an acoustic system capable of simultaneously emitting ultrasonic signals and audible audio signals. 【Background technique】 [0002] With the continuous development of personal electronic products, the way people interact with electronic devices is also changing, from keyboard input at the beginning to touch input, and now there is a new non-contact gesture recognition or finger positioning human interaction model. [0003] The acoustic system related to the present invention adopts an independent ultrasonic transducer unit, transmits ultrasonic signals through a plurality of ultrasonic transducer units, and then uses a microphone to receive echo signals for gesture recognition. However, the acoustic system of this structure needs to use other audio devices to realize the output of the audio signal, and the number of devices used in this structure is relatively large, and it takes up space...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/20
Inventor 唐琪冯声振
Owner AAC TECH NANJING
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