Abstract:A tunable liner (TL) based on the inverse piezoelectric effect is developed to tackle the shortage of traditional liners, such as unchangeable structure and uncontrollable sensitive frequency. It consists of a neck, resonant chamber and piezoelectric patch which forms a Helmholtz resonator. The finite element modeling (FEM) is used to calculate the resonant frequency and sound pressure distribution of the acoustic system. The transmission loss measurement is carried out in an impedance tube to demonstrate the broadband noise control effect of the linear system. The result indicates that the TL peak frequency remains linear to the drive voltage and the sensitivity is measured to be 0.1 Hz/V. A DC amplifier circuit using photoresistor is designed to construct the function of control voltage, driving voltage, and noise frequency. The control algorithm is developed by LabVIEW software. When the noise frequency drifts from 746 Hz to 788 Hz, the driving voltage can be modulated automatically from 110 to 420 V, and the liner keeps resonating. The adaptive noise control is realized to reduce broadband noise.