青云翻译

This measurement method is generally used to measure single-frequency source, the measurement procedure more complicated, and because the cavity after perforation plate limits the measurement frequency range is relatively narrow;

The measurement is generally measured using single frequency sources, measurement procedures more cumbersome, and because of perforated cavity after limiting the frequency of measurement is relatively narrow in scope;

This measuring technique is generally uses the monofrequent acoustic source to carry on the survey, the survey step quite is tedious, after because simultaneously the perforation plate the cavity limit survey frequency range quite is also narrow;

This measurement method is generally used for surveying, single-frequency sound source measure steps, and at the same time as cumbersome cavity perforated board after the limit frequency of measurement is also relatively narrow scope;

The measurement is generally measured using single frequency sources, measurement procedures more cumbersome, and because of perforated cavity after limiting the frequency of measurement is relatively narrow in scope;