WebMar 9, 2024 · The maximum sound source level can reach a value of 228 dB. In the same frequency band, the sensitivity of the receiving array can reach a value of 184 dB, and the fluctuation is less than 5 dB. Compared with the narrowband 1-3 composite array of the same size, the acoustic performance of this sub-array has obvious advantages. WebMar 14, 2024 · Based on these, we propose an underwater acoustic structure, which can improve and obtain low-frequency and broadband sound absorption performance by embedding local resonators into FGMs. To reveal the sound-absorbing mechanism and further optimize the low-frequency absorption performance of the structure, we conduct …
Bilayer ventilated labyrinthine metasurfaces with high sound …
WebSep 1, 2024 · Those metamaterials were designed to absorb sounds with frequencies above the cut-off frequency of 345 Hz, and a resistive layer (an acoustic sponge) was placed in front of the metamaterial. It was shown that such absorber with the thickness of λ /7 exhibited great absorbing performance above the cut-off frequency. WebDec 1, 2024 · Many studies have also embedded various acoustic metamaterials in viscoelastic polymers to enhance low-frequency and broadband sound absorption through local resonance. ... Influence of... pineland money
Phys. Rev. Applied 13, 044028 (2024) - Broadband Acoustic …
WebIn summary, we have theoretically demonstrated a broadband low-frequency soundproof ventilation channel with a structural thickness of only 120 mm (about λ/6), which can … WebMay 16, 2024 · To realize efficient low-frequency underwater broadband sound absorption, as shown in Fig. 1 (a), a deep subwavelength acoustic meta -structure is … WebNov 13, 2024 · We successively demonstrate three ultra-broadband functionalities, including acoustic beam steering, focusing and levitation, featuring record-breaking relative bandwidths of 93.3%, 120% and... pineland mental health vidalia georgia