Anechoic noise-attenuating device for liquid ducting as well as method and circuit using it to measure the energy emitted by hydraulic equipment

摘要

The invention relates to monitoring and measuring the noise in hydraulic ductings. Anechoic device comprising an open rigid tube 1 whose perforated wall 3 is covered with an elastic membrane 4, and which is inserted into an outer tube 5 of greater diameter. Application especially to noise attenuation in hydraulic ductings and to measurement of the noise emitted by hydraulic equipment apparatus. IMAGE