Impact sound detection method and detection system
A detection method and impact sound technology, applied in voice analysis, instruments, etc., can solve the problems of short duration of impact sound, complicated operation, low frequency resolution, etc., and achieve the effect of improving accuracy and improving accuracy
Active Publication Date: 2014-06-25
SHANGHAI KEYGO TECH CO LTD
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[0003] However, the traditional impact sound detection method is to perform spectrum analysis on the sound under test. However, the operation is relatively complicated, and because the impact sound usually lasts for a short time and the frequency resolution is not high, the method of spectrum analysis is used for the detection of impact sound. has certain limitations
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[0012] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, some details irrelevant to the solutions of the embodiments of the present invention are omitted to prevent confusion to the understanding of the present invention.
[0013] In order to describe the implementation steps of the present invention clearly and in detail, the specific embodiments of the present invention are given below, which are applicable to impact sound detection. It should be noted that the present invention is not limited to this application, but is applicable to the detection of other related sounds.
[0014] figure 1 is a flow chart 100 of the impact sound detection method according to the embodiment of the present invention. First, in step 102, the sound under test is collected, and the sound pressure signal of the sound under test in the time domain is obtained.
[0015] In step 104, based on ...
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An impact sound detection method comprises the steps of acquiring detected sound and obtaining a sound pressure signal of the detected sound in a time domain; extracting a first characteristic of the detected sound based on the sound pressure signal of the detected sound; comparing the first characteristic of the detected sound with a first preset threshold value for the first time to judge whether the detected sound possibly includes impact sound or not; calculating an impact response spectrum of the sound pressure signal of the detected sound in the time domain if the detected sound possibly includes the impact sound, calculating correlation coefficients of the impact response spectrum of the detected sound and an impact response spectrum of a standard impact sound sample, comparing the correlation coefficients with a second preset threshold value for the second time and judging whether the detected sound includes the impact sound or not.
Description
technical field [0001] The present invention generally relates to the technical field of sound signal processing, and in particular to an impact sound detection method and detection system. Background technique [0002] On the automated production line, when related parts are combined, such as combining two buckles, if there is no error, the two buckles will lock each other according to the design requirements and are not easy to be separated. However, there are also cases where the two buckles are not locked according to the design requirements due to certain errors and are easily separated. However, it is time-consuming and labor-intensive to check each pair of buckles by manual means, and the efficiency is very low. Considering that when the two buckles are locked with each other according to the design requirements, a specific impact sound will be emitted, so it can be judged whether the two buckles are locked with each other according to the design requirements by dete...
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IPC IPC(8): G10L25/51G10L25/03
Inventor 张文彬魏敦楷
Owner SHANGHAI KEYGO TECH CO LTD