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Method and system for testing frequency response curve of parametric array loudspeaker

A technology of frequency response curve and test method, applied in frequency/direction characteristic devices, electrical components, etc., can solve the problems of noise in recording files, deviation of audible sound frequency response characteristic test results, etc., and achieve the effect of avoiding huge deviation

Pending Publication Date: 2022-06-03
AUDFLY TECH SUZHOU CO LTD
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Problems solved by technology

[0004] However, in the test of the frequency response characteristics of the audible sound demodulated by the parametric array loudspeaker, the modulated ultrasonic carrier modulation signal will directly radiate the microphone diaphragm, causing the microphone diaphragm to vibrate naturally, so the frequency response of the audible sound During the test of the characteristics, the microphone diaphragm will be in an abnormal working state, which will cause a huge deviation in the test results of the audible frequency response characteristics, and the recorded recording files will also produce additional noise due to the above situation

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  • Method and system for testing frequency response curve of parametric array loudspeaker
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  • Method and system for testing frequency response curve of parametric array loudspeaker

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Embodiment Construction

[0039] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0040] Unless expressly stated otherwise, throughout the specification and claims, the term "comprising" or its conjugations such as "comprising" or "comprising" and the like will be understood to include the stated elements or components, and Other elements or other components are not excluded.

[0041] The method and system for testing the frequency response curve of a parametric array loudspeaker disclosed in the present invention can obtain the compensation curve of the frequency response characteristic of the audible sound signal demodulated by the parametric array loudspeaker through measurement, and indirectly and accurately according to the compensation curve The frequency response curve of the audible acoustic signal demodulated by the parametric array loudsp...

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Abstract

The invention discloses a frequency response curve testing method and system of a parametric array loudspeaker. The method comprises the steps that a compensation curve of frequency response characteristics of audible sound signals demodulated by the parametric array loudspeaker is obtained through measurement; measuring to obtain a first frequency response curve of an audible sound signal demodulated by the parametric array loudspeaker under the condition of first shielding, wherein the first shielding at least shields and absorbs part of the ultrasonic signal and part of the audible sound signal emitted by the parametric array loudspeaker; and according to the compensation curve and the first frequency response curve, obtaining a frequency response curve of the audible sound signal demodulated by the parametric array loudspeaker under the condition of no shielding. According to the method, the frequency response curve of the audible sound signal demodulated by the parametric array loudspeaker under the condition of no shielding can be accurately measured.

Description

technical field [0001] The invention relates to the technical field of frequency response curve testing, in particular to a frequency response curve testing method and system of a parametric array loudspeaker. Background technique [0002] The principle of parametric array speakers is different from that of speakers in the general sense. The principle is to use the nonlinear effect of ultrasonic carrier waves to propagate in the air medium to generate audio signals. It can be perceived by the human ear, so as to realize the function of the speaker. [0003] The working principle of the parametric array speaker is mainly as follows: first, the input audio signal is preprocessed, and the preprocessed audio signal and the ultrasonic carrier signal are amplitude modulated to generate the ultrasonic carrier modulation signal; then the modulated signal is processed by a power amplifier. After the power is amplified, the ultrasonic wave is transmitted into the air through the ultr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/22H04R29/00
CPCH04R1/22H04R29/001
Inventor 匡正毛峻伟顾振荣
Owner AUDFLY TECH SUZHOU CO LTD
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