Full band natural sound effect audio directional loudspeaker

An audio directional, full-band technology, applied in the direction of frequency response correction, etc., can solve the problems of weakening the frequency domain response of low-band or high-band signals, difficult to achieve full-bandwidth compensation of audio directional speakers, unnatural sound, etc.

Active Publication Date: 2007-08-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a full-band natural sound audio frequency directional loudspeaker that can be compensated in the full-band range and processed with natural sound effects, so as to solve the problem caused by the fact that the 12dB / octave frequency response inclination is difficult to realize full-bandwidth compensation. The frequency domain response weakening and distortion of the low frequency band or high frequency band signal output by the audio frequency directional speaker
[0008] Another object of the present invention is to provide a kind of equipment that produces high directivity direct sound, early reflection sound and reverberation sound to synthesize natural sound, solves the problem that audio frequency directional loudspeaker produces high directivity sound because there is only direct sound, there is no or only very small early stage Unnatural sounding caused by reflections and reverberation

Method used

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  • Full band natural sound effect audio directional loudspeaker
  • Full band natural sound effect audio directional loudspeaker
  • Full band natural sound effect audio directional loudspeaker

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Embodiment Construction

[0030] Fig. 1 shows a schematic hardware structure of a full-band audio frequency directional speaker. The full-band audio frequency directional loudspeaker is composed of low-pass filter 1, AD converter 2, signal processing system 3, signal post-processing system and power amplifier 4, DA converter group 5, signal reconstruction filter group 6 and transducer group 7 . The first major component that an audio directional loudspeaker makes contact with the outside world is the low-pass filter 1. The audio signal passes through the low-pass filter 1 to filter out the out-of-band components of the audio signal, and is input to the audio directional speaker system. The audio signal whose out-of-band components are filtered out is in the range of 20Hz~20kHz or 0~20kHz, and is converted into a digital signal by the AD converter 2 . The signal processing system behind the AD converter 2 can be composed of a single-chip microcomputer, a signal processing chip (DSP) or a field program...

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Abstract

The invention relates to one whole frequency band natural audio direction microphone, which comprises low pass filter, AD converter, signal process system, signal back process system and power amplifier, DA conversion set, re-set filter sets and energy conversion, wherein, the above signal process system comprises more than three frequency division digital filter and more than three filters with inclination and supersonic modulation. The invention can compensate audio signals in whole frequency band range for natural audio effect program to realize whole frequency output.

Description

technical field [0001] The invention relates to an audio-frequency directional loudspeaker, in particular to a high-directivity loudspeaker capable of performing frequency compensation on the full frequency band of audio and processing natural sound effects. Background technique [0002] The audio frequency directional loudspeaker is a new type of loudspeaker that uses the nonlinear propagation effect of ultrasonic waves in the air to produce high-directional audible sound. After the audio signal is processed, it forms an ultrasonic wave containing the audio signal information, and the ultrasonic wave is emitted into the air by the sound-generating device of the audio-directional speaker-the transducer, and then the ultrasonic wave will self-demodulate the audio contained in it in the air signal, forming a highly directional audible sound signal. [0003] In 1965, H.O.Berktay proposed a more accurate parametric array theoretical model than that proposed by Peter Westervelt,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/04
Inventor 徐利梅陈敏王祎李学生李辉
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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