Method for detecting water supplying/draining noise of sanitary wares by A-weighted sound power level measurement method

Abstract

The invention relates to a method for detecting water supplying / draining noise of sanitary wares. The detection includes the following steps: sample installation and debugging; sound source referencebody and parallelepiped measurement surface determination; sound pressure level measurement; sound power level calculation and background noise, test environment and meteorological condition correction; and result evaluation. The method is characterized in that slow-time weighting characteristic ''S'' of an A-weighted equivalent sound level of a sound level meter is used to precisely and quantitatively detect the water supplying / draining noise of the sanitary wares characterized by a cumulative percentage sound power level L<WA(50)> on a parallelepiped measurement surface. The method of the invention prescribes the determination of A-weighted cumulative percentage time average sound pressure levels L'<pAi(ST)(50)h>, L'<pAi(ST)(50)c> and L<pAi(B)(50)> of the water supplying / draining noise and background noise of the sanitary wares on the parallelepiped measurement surface under specific flow rate and water temperature conditions, calculates the sound power level L<WA(50)> in a completehot and cold cycle water injection period, and provides a result evaluation basis. The method for detecting the water supplying / draining noise of the sanitary wares by an A-weighted sound power levelmeasurement method fills the blank in the technical field of detection of water supplying / draining noise of sanitary wares, realizes the scientificity of the method and the comparability of results, and can provide detection technical support for relevant production enterprises to improve product quality and environmental protection departments to improve law enforcement effectiveness.

Description

Technical field [0001] The present invention relates to a noise quantitative test method, in particular to a slow-time weighting characteristic "S" that uses a sound level meter A to weight the equivalent sound level to a cumulative percentage sound power level L on a parallelepiped measurement surface WA(50) The characterization method for detecting the water supply / drainage noise of sanitary ware belongs to the technical field of sanitary ware physical and chemical performance detection. Background technique [0002] Biological studies have shown that environmental noise has a significant impact on the human body: when the noise is greater than 45dB(A), it will affect sleep; when the noise is greater than 55dB(A), it will cause emotional anxiety; when the noise is greater than 75dB(A), it will reduce learning and work efficiency ; When the noise is greater than 90dB(A), it will cause temporary hearing threshold shift; when it is greater than 140dB(A), it will cause acute ear tra...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a slow time weighting characteristic "S" of the equivalent sound level of the weighted equivalent sound level of the sound level meter to the cumulative percentage sound power level L on the parallelepiped measurement surface. WA(50) The method of detecting the water supply / drainage noise of the characterized sanitary ware can solve the problem of accurate quantitative testing of the water supply / drainage noise of the sanitary ware and even the flushing noise of the toilet

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