A Nonlinear Measurement and Sound Quality Tuning Method for Loudspeaker System

A loudspeaker, nonlinear technology, applied in the direction of sensors, transducer circuits, sensor components, etc., to achieve the effect of improving harmony

Active Publication Date: 2021-04-13
NINGBO SOUNDKING ELECTRONICS
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The invention designs a method for nonlinear measurement and sound quality tuning of a loudspeaker system, which solves the difficulties and problems of the nonlinear distortion compensation technology of the traditional loudspeaker system

Method used

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  • A Nonlinear Measurement and Sound Quality Tuning Method for Loudspeaker System
  • A Nonlinear Measurement and Sound Quality Tuning Method for Loudspeaker System
  • A Nonlinear Measurement and Sound Quality Tuning Method for Loudspeaker System

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Embodiment 1

[0065] Such as Figure 5 As shown, the loudspeaker system nonlinear distortion and sound quality evaluation module in the present invention includes the generation of nonlinear distortion test signals, the transmission and reception of test signals, the spectrum analysis of test signals, the analysis display and data storage of nonlinear distortion evaluation results.

[0066] The hardware circuit implementation of the speaker system nonlinear distortion and sound quality evaluation module includes the following parts:

[0067] 1.1. Input signal: 1 Mic input signal enters the nonlinear distortion evaluation module;

[0068] 1.2. Main functions: This module provides a measurement mode for harmonic composite sound test signals: send harmonic composite sound signals to a certain speaker system to be tested successively, and perform harmonic spectrum calculation on the harmonic composite sound collected by the microphone to generate Corresponding harmonic modulation data sheet; ...

Embodiment 2

[0076] Such as Figure 6 Shown, the hardware circuit realization of the nonlinear sound quality tuning module of loudspeaker system in the present invention comprises the following parts:

[0077] 2.1. Input signal: According to the selection of two function modes of this module, one channel of actual audio signal is sent to the tuning sub-module of short-time Fourier transform, or the tuning sub-module of dynamic harmonic equalization, and only one of them can be selected. .

[0078] 2.2. Main functions: After 1 channel of actual audio signal enters the nonlinear sound quality tuning module, it will output 1 channel of audio signal after corresponding real-time processing and calculation. The real-time processing calculation process includes a sound quality tuning mode based on short-time Fourier transform analysis of the input audio stream signal, harmonic spectrum correction and Fourier inverse transform synthesis.

[0079] 2.3. Output signal: 1 channel output corresponds...

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Abstract

The invention relates to a nonlinear distortion measurement and sound quality tuning method of a loudspeaker system. It explores the commonality between the harmonic distortion characteristics of the loudspeaker system and the harmonic characteristics of instrumental music / speech sound at the physical level and the auditory psychological level. According to the sound The theoretical basis of harmony, through innovative audio signal processing algorithms, real-time nonlinear pre-regulation of the input audio stream signal of the speaker system, so that the harmonic characteristics of the input audio signal and the nonlinear characteristics of the speaker system can be tuned To realize the harmonious change of the output sound signal of the speaker system, thereby improving the pleasing feeling of the sound reproduced by the speaker system. On the premise of not changing the physical structure and technology of the speaker system, the present invention realizes the nonlinear sound quality tuning of the speaker system, not only controls the production cost of the speaker, but also effectively improves the distorted sense of hearing of the speaker system, and at the same time can give full play to the digital The flexibility and versatility of an audio signal processing platform.

Description

technical field [0001] The invention relates to the innovative technical field of nonlinear distortion measurement and sound quality hearing compensation of a sound system, in particular to a method for measuring nonlinear distortion and sound quality tuning of a loudspeaker system. Background technique [0002] Such as figure 1 As shown, the low-frequency and high-frequency nonlinear distortion of the speaker system is a very common phenomenon, which is also the essential reason for its poor sound quality. The traditional way to improve the sound quality of loudspeakers is to improve the materials, structures and processes of the loudspeakers, but this method will be restricted by other technical fields and economic costs after reaching a certain level. With the wide application of DSP technology, it is an inevitable trend to perform speaker sound quality compensation through audio signal processing. [0003] At present, most of the discussions on speaker nonlinear distor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00
CPCH04R3/00H04R2430/00
Inventor 张婧颖
Owner NINGBO SOUNDKING ELECTRONICS
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