The fixed and narrow working frequency bandwidth limits the use of most acoustic absorbers in a dynamic acoustic environment. Shrestha and colleagues designed a tunable acoustic absorber capable of absorbing sound with varying frequency bands using dielectric elastomer bending actuators. The triangular petal-like structure actively reconfigures its shape by voltage activation to shift the noisy absorption spectrum, offering a practical solution for real-time outdoor noise absorption.
- M. Shrestha
- G. K. Lau
- Z. B. Lu
