Method for detecting flushing noises of pedestal pan by sound power level parallelepiped measurement surface method

Abstract

The invention relates to a method for detecting flushing noises of a floor type ceramic pedestal pan. The detection steps include sample installation and debugging, determination of a sound source reference body and a parallelepiped measurement surface, sound pressure level measurement, sound power level calculation and background noise, test environment and weather condition correction, and result evaluation. The method is specially characterized in that the flushing noises of the pedestal pan, represented by the cumulative percent sound power level LWA(50), on the parallelepiped measurementsurface are accurately and quantitatively detected by applying a slow time weighting characteristic "S" of the A weighting equivalent sound level of a sound level meter. It is stipulated that the A weighting cumulative percent time average sound pressure levels L'pAi(ST)(50) and LpAi(B)(50) of the flushing noises and background noises on the parallelepiped measurement surface are measured; the sound power level LWA(50) of the flushing noises in a normal flushing period is calculated; and meanwhile, a result evaluation basis is provided. The method fills the blank of the technical field of pedestal pan flushing noise detection; the scientificity of the method and the comparability of a result are achieved; and the technical support can be provided for ceramic enterprises to improve production processes and standardize market order.

Description

technical field [0001] The present invention relates to a noise quantitative testing method, specifically a slow-time weighting characteristic "S" of a sound level meter A-weighted equivalent sound level to measure the sound power level L by a cumulative percentage on a parallelepiped surface. WA(50) The invention discloses a method for detecting the flushing noise of a characterized floor-type ceramic toilet, and belongs to the technical field of ceramic physical and chemical performance detection. Background technique [0002] The noise generated during the toilet flushing process belongs to the category of liquid dynamic noise, which is roughly composed of three parts: the structural vibration noise of the pipeline, the fluid noise of the water and the cavitation noise. In the area, the pipeline forms mechanical vibration under the action of the excitation force; while the fluid noise comes from the pressure and flow velocity changes of the liquid, mainly including the no...

AI Technical Summary

Problems solved by technology

[0004] 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 flushing noise of the characterized toilet can solve the problem of accurate quantitative testing of the flushing noise of the floor-mounted ceramic toilet and even the water inlet / drainage noise of sanitary ceramics

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