Thermal tuning of acoustic transmission enhancement through a phononic crystal slab

2013 ◽  
Author(s):  
Chao-wei Xu ◽  
Fei-yan Cai ◽  
Shu-hong Xie ◽  
Jiang-yu Li ◽  
Hai-rong Zheng
Keyword(s):  
Phononic Crystal ◽  
Acoustic Transmission ◽  
Transmission Enhancement ◽  
Thermal Tuning

scholarly journals Tunable Fluid-Type Metasurface for Wide-Angle and Multifrequency Water-Air Acoustic Transmission

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Zhandong Huang ◽  
Shengdong Zhao ◽  
Yiyuan Zhang ◽  
Zheren Cai ◽  
Zheng Li ◽  
...  
Keyword(s):  
Incident Angle ◽  
Acoustic Energy ◽  
Wide Angle ◽  
Acoustic Metamaterials ◽  
Fluid Type ◽  
Acoustic Transmission ◽  
Interface Instability ◽  
Practical Applications ◽  
Air Interface ◽  
Transmission Enhancement

Efficient acoustic communication across the water-air interface remains a great challenge owing to the extreme acoustic impedance mismatch. Few present acoustic metamaterials can be constructed on the free air-water interface for enhancing the acoustic transmission because of the interface instability. Previous strategies overcoming this difficulty were limited in practical usage, as well as the wide-angle and multifrequency acoustic transmission. Here, we report a simple and practical way to obtain the wide-angle and multifrequency water-air acoustic transmission with a tunable fluid-type acoustic metasurface (FAM). The FAM has a transmission enhancement of acoustic energy over 200 times, with a thickness less than the wavelength in water by three orders of magnitude. The FAM can work at an almost arbitrary water-to-air incident angle, and the operating frequencies can be flexibly adjusted. Multifrequency transmissions can be obtained with multilayer FAMs. In experiments, the FAM is demonstrated to be stable enough for practical applications and has the transmission enhancement of over 20 dB for wide frequencies. The transmission enhancement of music signal across the water-air interface was performed to demonstrate the applications in acoustic communications. The FAM will benefit various applications in hydroacoustics and oceanography.

Acoustic transmission enhancement through a soft interlayer with a reactance boundary

2015 ◽  
Vol 138 (2) ◽  
pp. 782-790 ◽  
Author(s):  
Li Quan ◽  
Feng Qian ◽  
Xiaozhou Liu ◽  
Xiufen Gong
Keyword(s):  
Acoustic Transmission ◽  
Soft Interlayer ◽  
Transmission Enhancement

Thermal tuning of Lamb wave band structure in a two-dimensional phononic crystal plate

2011 ◽  
Vol 110 (12) ◽  
pp. 123503 ◽  
Author(s):  
Yuanwei Yao ◽  
Fugen Wu ◽  
Xin Zhang ◽  
Zhilin Hou
Keyword(s):  
Band Structure ◽  
Lamb Wave ◽  
Phononic Crystal ◽  
Crystal Plate ◽  
Wave Band ◽  
Two Dimensional ◽  
Thermal Tuning

scholarly journals Acoustic Transmission Enhancement through a Periodically Structured Stiff Plate without Any Opening

2010 ◽  
Vol 105 (7) ◽  
Author(s):  
Zhaojian He ◽  
Han Jia ◽  
Chunyin Qiu ◽  
Shasha Peng ◽  
Xuefei Mei ◽  
...  
Keyword(s):  
Acoustic Transmission ◽  
Transmission Enhancement

Tunable broadband unidirectional acoustic transmission based on a waveguide with phononic crystal

2016 ◽  
Vol 122 (8) ◽  
Author(s):  
Ailing Song ◽  
Tianning Chen ◽  
Xiaopeng Wang ◽  
Lele Wan
Keyword(s):  
Phononic Crystal ◽  
Acoustic Transmission

Thermal Tuning of Band Structures in a One-Dimensional Phononic Crystal

2013 ◽  
Vol 81 (4) ◽  
Author(s):  
Zuguang Bian ◽  
Wei Peng ◽  
Jizhou Song
Keyword(s):  
Band Gap ◽  
Acoustic Waves ◽  
Vibration Isolation ◽  
Phononic Crystal ◽  
Phononic Crystals ◽  
Band Gaps ◽  
Polybutylene Terephthalate ◽  
Band Structures ◽  
One Dimensional ◽  
Thermal Tuning

Phononic crystals make the realization of complete acoustic band gaps possible, which suggests many applications such as vibration isolation, noise suppression, acoustic barriers, filters, wave guides, and transducers. In this paper, an analytic model, based on the transfer matrix method, is developed to study the band structures of bulk acoustic waves including SH-, P-, and SV-waves in a one-dimensional phononic crystal, which is formed by alternating strips of two different materials. The analysis is demonstrated by the phononic crystal of Ba0.7Sr0.3TiO3 (BST) and polybutylene terephthalate (PBT), whose elastic properties depend strongly on the temperature. The results show that some band gaps are very sensitive to the temperature. Depending on the wave mode, the center frequency of the first band gap may decrease over 25% and band gap width may decrease over 60% as the temperature increases from 30 °C to 50 °C. The transmission of acoustic waves in a finite phononic crystal is also studied through the coefficient of transmission power. These results are very useful for the design and optimization of thermal tuning of phononic crystals.

Waveform-preserved unidirectional acoustic transmission based on impedance-matched acoustic metasurface and phononic crystal

2016 ◽  
Vol 120 (8) ◽  
pp. 085106 ◽  
Author(s):  
Ai-Ling Song ◽  
Tian-Ning Chen ◽  
Xiao-Peng Wang ◽  
Le-Le Wan
Keyword(s):  
Phononic Crystal ◽  
Acoustic Transmission

scholarly journals Non-reciprocal acoustics in a viscous environment

2020 ◽  
Vol 476 (2244) ◽  
pp. 20200657
Author(s):  
Hyeonu Heo ◽  
Ezekiel Walker ◽  
Yurii Zubov ◽  
Dmitrii Shymkiv ◽  
Dylan Wages ◽  
...  
Keyword(s):  
Time Reversal ◽  
Phononic Crystal ◽  
Circular Cylinders ◽  
Inviscid Fluid ◽  
Transmission Spectra ◽  
Acoustic Transmission ◽  
Viscous Losses ◽  
Anisotropic Solid ◽  
Reported Study ◽  
Passive Acoustic

It is demonstrated that acoustic transmission through a phononic crystal with anisotropic solid scatterers becomes non-reciprocal if the background fluid is viscous. In an ideal (inviscid) fluid, the transmission along the direction of broken P symmetry is asymmetric. This asymmetry is compatible with reciprocity since time-reversal symmetry ( T symmetry) holds. Viscous losses break T symmetry, adding a non-reciprocal contribution to the transmission coefficient. The non-reciprocal transmission spectra for a phononic crystal of metallic circular cylinders in water are experimentally obtained and analysed. The surfaces of the cylinders were specially processed in order to weakly break P symmetry and increase viscous losses through manipulation of surface features. Subsequently, the non-reciprocal part of transmission is separated from its asymmetric reciprocal part in numerically simulated transmission spectra. The level of non-reciprocity is in agreement with the measure of broken P symmetry. The reported study contradicts commonly accepted opinion that linear dissipation cannot be a reason leading to non-reciprocity. It also opens a way for engineering passive acoustic diodes exploring the natural viscosity of any fluid as a factor leading to non-reciprocity.

Thermal Tuning of Vibration Band Gaps in Thin Phononic Crystal Plates with Nitinol

2014 ◽  
Vol 597 ◽  
pp. 78-83 ◽  
Author(s):  
Hao Jiang Zhao ◽  
Rong Qiang Liu ◽  
Hong Wei Guo
Keyword(s):  
Plane Wave ◽  
Phononic Crystal ◽  
Band Gaps ◽  
Vibration Band ◽  
Plane Wave Expansion ◽  
Band Structures ◽  
Filling Fraction ◽  
Wave Expansion ◽  
Square Array ◽  
Thermal Tuning

Vibration band structures of thin phononic crystal plates (PCPs) with square array and graphite array of nitinol inserts are calculated by the plane wave expansion (PWE) method. The influences of filling fraction are considered when investigating the effects of the varying temperature on the band gaps. Vibration band gaps of these PCPs can be tuned by changing temperature. This study will be useful in designing PCPs with tunable gaps.

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