| 摘 要： | The acoustic impedance caused by sound radiation at the terminals ofthe aperturc on cylindrical surface is analyzed based upon rigorous soundtheory.In low frequency range,the approximate solution of the specific acousticresistance is derived.Special treatments are introduced in order to simplify the so-lution of the specific acoustic reactance.It is verified that the specific acousticreactancc of such an aperture is equal to that of a similar aperture on the infinitelylarge plane when the small quantities of high order are neglected.
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