Simultaneous realization of large sound insulation and efficient energy harvesting with acoustic metamaterial

Abstract

Acoustic metamaterials, capable of both sound insulation and energy harvesting, composed of Helmholtz resonators and built-in decorated membranes are proposed. It is theoretically and experimentally proved that the proposed metamaterial can obtain two sound insulation bands where the sound energy is also efficiently harvested at the same frequency simultaneously. The peak of the output power can reach up to 244 nW when the incident sound pressure is 1 Pa, which is about 14 times larger than structures composed of single membrane reported before with the same input. Moreover, considerable energy harvesting with average output power of about 20 nW can be achieved within wider frequency ranges (with bandwidth up to 90 Hz) by choosing proper parameters. Additionally, the hybrid resonance mechanism of the proposed metamaterials is explained well with an equivalent theoretical model. These novel properties of the proposed metamaterial can be applied in many potential applications in noise control and energy harvesting.

Fabricating and Assembling Acoustic Metamaterials and Phononic Crystals

“…Acrylic plates were mechanically fastened together using bolts to construct the resonator for sound insulation ( Figure 7a) and energy-harvesting applications. [18] A major advantage of using adhesives is the ability to bond different types of materials together. Other membrane-type AMMs have bonded material layers such as polycarbonate and porous fiberglass wool (Figure 7b), [39] polyurethane and plastic, [26] or latex rubber on aramid fiber sheets.…”

“…Reproduced with permission. [18] Copyright 2018, IOP Publishing Ltd. b) Layered membrane-type AMM for absorption and broadband insulation. Reproduced with permission.…”

“…[6][7][8] While these exotic structures have been well explored through theoretical and numerical analysis, [9][10][11][12][13] their physical realization is an important topic that is rarely discussed.Considering the ubiquity of sound and the powerful capabilities of AMMs and PCs, the impact of these acoustic structures could be phenomenal. Across the full acoustic frequency spectrum, practical applications such as noise cancellation, [14] underwater detection, [15] medical imaging, [16] and energy harvesting [17,18] could benefit key sectors in our society like healthcare, well-being, environmental sustainability, and security. Moreover, AMMs and PCs can help to usher in next-generation technologies for personalized, immersive multisensory [19][20][21][22] experiences.…”

Recent Developments of Acoustic Energy Harvesting: A Review

“…Zhang et al [68] proposed another type of acoustic metamaterial for simultaneous noise insulation and energy harvesting. The proposed structure is composed of a Helmholtz resonator and a built-in decorated membrane; the schematic diagram is shown in Figure 25.…”

Binary-Like Topology Optimization of Piezoelectric Metamaterial Plate with Interface Circuits Using Extended Plane Wave Expansion Method

“…Later, Chen et al continued to build an elastic-electro-mechanical model of the PMP with interface circuits (PMPICs) [20]. Zhang et al proposed an acoustic metamaterial that had dual functionality of sound insulation and energy harvesting simultaneously [21]. Existing studies have shown that PMPs provide a promising way of harvesting structural vibrations.…”