Abstract: In order to improve the sound control performance of the traditional Herschel-Quincke (HQ) tube with a fixed natural frequency, and to make the HQ tube applicable in a complex noise frequency environment, a mounted ball valve is used to adjust the natural frequency of HQ tube for making the HQ tube tunable. Based on impedance theory model, the maximum tunable frequency range is derived. To further analyze the sound control performance of the proposed tunable HQ tube, the sound transmission loss is calculated by using COMSOL software. Finally, the tunable HQ tube is designed and verified by experiments. The calculated and experimental results show that the natural frequency of the HQ is increased linearly with the opening cross-section area. It is also found that the tunable frequency range is from 187.5 to 296 Hz, i e. the adjustable frequency band-width is 108.5 Hz for the proposed tunable HQ tube.