Asymmetric acoustic field generation using asymmetrical impedance meta-surface

Asymmetric acoustic field generation using asymmetrical impedance meta-surface

Blog Article

In this study, we design and demonstrate an Asymmetrical Impedance Meta-surface (AIM), developed from Helmholtz resonators with variable internal coiling structures, to generate an asymmetrical acoustic field.We predict the phase delay characteristics of individual unit cells within these resonators through numerical simulations and strategically align them to ensure efficient linear variation in acoustic impedance at 5280 Hz.We validate the effectiveness of ngetikin AIM by measuring the Sound Pressure Level (SPL) distribution using both numerical and experimental methods.We demonstrate that the coiled subwavelength unit telemarkskongen flue cells contribute to the creation of artificial material properties, as evidenced by effective media numerical simulations.We anticipate that the use of AIM will enable the detection of lateral movements of sound sources using a single sensor, significantly reducing the need for multiple sensors and enhancing the efficiency of acoustic tracking.