音響インピーダンス測定装置の測定精度について

概要

論文の詳細を見る
The accuracy of the acoustic impedance and the absorption factor measured by the standing wave method was calculated theoretically, and the accuracy of the measuring apparatus Type 4002 made by Brüel & Kjaer was examined. The measuring frequecy range of the apparatus was from 250 cps to 4500 cps. Since an acoustic impedance accuracy of 2% in error was required theoretically, the measuring apparatus was examined for an accuracy of 2% in error. Some defects were found to be improved. 1) It was desirable to separate the impedance measuring tube from the speaker box. 2) It was desirable that the diameter of the probe tube was smaller than about 3 mm. 3) The type of the probe tube orifice should desirably be changed.
九州大学の論文