Time-domain tracking filter fast detecting acoustic response parameter of sounding body and system

Abstract

The invention proposes a method and system for applying a time-domain tracking filter technique in a conventional audio measurement unit for measuring the audio response parameter of a sound producer. The present invention adopts a special signal to excite the sound producer to be tested; after testing the voltages at both ends of the sound producer and the sound pressure signals, the invention can use the time-domain tracking filter to track the base frequency variation in the audio response; the invention can obtain various audio response parameter results curve such as base frequency response, each harmonic response, total harmonic distortion+noise response, total harmonic distortion response and the like by processing such as equivalent low pass filtering, band-pass filtering, band elimination filtering, high-pass filtering and the like. The invention has superiority which lies in that it can separate and obtain the base frequency and subfrequency response in the audio response ofthe sound producer to be tested in a short time based on the time-domain, which can greatly enhance the test efficiency to the audio response parameter of the sound producer in the R&D stage and the quality management stage.

Description

technical field [0001] The invention relates to a method and a test system for detecting acoustic response parameters of a sounding body. After the acoustic response of the sounding body is obtained by exciting a special signal to the sounding body under test, the time-domain tracking filter mentioned in this paper can be used to track the change of the fundamental frequency in the acoustic response. Various result curves such as fundamental frequency response, harmonic response, total harmonic distortion + noise response, total harmonic distortion response, etc. Background technique [0002] Significance of rapid measurement of sounding body acoustic response parameters: [0003] The linear acoustic response parameters of the sounding body play an important role in the design, manufacture, and quality control of the sounding body. As the name implies, the sound emitter is a kind of transducer that emits sound, so the most important indicator of the sound emitter is the ac...

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: 1. When using discrete frequency measurement, there is a great contradiction between improving the accuracy of the test and speeding up the test; 2. When more harmonics need to be solved, the complexity of the calculation will increase significantly. Higher hardware requirements

This method requires dual-channel analysis, which limits the possibility of measuring multiple electro-acoustic parameters at one time. At the same time, the objective consistency of this method has not been recognized by the industry.

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