The Acoustics Abnormal Reflection Based on the Generalized Snell's Law

Based on the generalized Snell's reflection law, an acoustic artificial structure was designed to utilize the spatial distribution of the reflection phase to steer the outgoing direction of the reflected acoustic wave. The reflected acoustic field of this acoustic structure is studied by simulation and measurement. The experimental results well match the theoretical predictions, proving that the designed acoustic structure can effectively produce different deviation angles under normal incident condition, leading the reflected wave to propagate along the abnormal reflection angle as anticipated. This study may have potential applications in various fields such as music hall design and ultrasound medical treatment.