AI Article Synopsis
- The study presents a new type of acoustic metasurface that can steer sound waves in one direction while preventing reflection in the opposite direction.
- This is achieved through a design that uses asymmetric phase modulation, combining a phase array with a material that has near-zero index properties.
- The research also demonstrates practical applications of this metasurface through effects like anomalous refraction, wave splitting, and converting sound waves into surface waves, which could enhance sound manipulation in fields such as ultrasonic imaging and therapy.
Article Abstract
We theoretically design and numerically demonstrate an acoustic one-way metasurface, which is a planar and acoustically subwavelength layer behaving like a nearly-reflectionless surface with arbitrary wave-steering capability for incident wave impinging on one side, while virtually blocking the reversed wave. The underlying mechanism is based on an asymmetric phase modulation by coupling a phase array and a near-zero-index medium. We exemplify a metastructure-based implementation by combining the hybrid metastuctures and labyrinthine structures. Moreover, the performance of the proposed implementation is demonstrated via three distinct phenomena of anomalous refraction, wave splitting and conversion of propagation wave to surface wave. Our findings may offer more possibilities for sound manipulation and improve the application potential of acoustic artificial devices in situations such as ultrasonic imaging and therapy.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4910075 | PMC |
| http://dx.doi.org/10.1038/srep28023 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Harmonic-to-noise ratio as speech biomarker for fatigue: K-nearest neighbour machine learning algorithm.
Med J Armed Forces India
December 2024
Associate Professor, Dayanand Sagar Univerity, Bengaluru, India.
Background: Vital information about a person's physical and emotional health can be perceived in their voice. After sleep loss, altered voice quality is noticed. The circadian rhythm controls the sleep cycle, and when it is askew, it results in fatigue, which is manifested in speech.
View Article and Find Full Text PDFA sound approach for ova denudation.
F S Sci
December 2024
The Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine, Weill Cornell Medicine, New York, NY, 10021, USA. Electronic address:
Article Synopsis
- Developed a non-contact method using acousto-hydrodynamic tweezers (AHT) for denuding cumulus-oocyte complexes (COCs), showing higher efficiency compared to traditional manual methods.
- Tested on mice, the method demonstrated no damage to oocytes and reduced denudation time by 46% while maintaining embryo development rates.
- Findings suggest that using acoustic waves can significantly improve the denudation process for intracytoplasmic sperm injection (ICSI), potentially enhancing fertility treatment procedures.
[Influence of etiology on the efficacy of ansa cervicalis anterior root-recurrent laryngeal nerve anastomosis in the treatment of unilateral vocal ford paralysis].
Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
December 2024
Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Naval Medical University (Changhai Hospital), Shanghai200433, China.
To explore the efficacy of ansa cervicalis anterior root-recurrent laryngeal nerve (RLN) anastomosis in the treatment of unilateral vocal fold paralysis (UVFP) and to analyze the effect of different pathogenic factors on efficacy. From January 2010 to January 2022, 428 patients (187 males and 241 females) at Changhai Hospital with UVFP who underwent ansa cervicalis anterior root-RLN anastomosis due to thyroid surgery, thoracic surgery, idiopathic vocal ford paralysis or high cranial base injury were analyzed. The course of nerve injury ranged from 6 to 24 months.
View Article and Find Full Text PDFEffect of Natural Fiber and Biomass on Acoustic Performance of 3D Hybrid Fabric-Reinforced Composite Panels.
Materials (Basel)
November 2024
Razi Metallurgical Research Center, No. 8, Fernan St., HajGhasem Asghari Blvd., Shahre Ghods Entrance (Sorkhe Hesar), Tehran P.O. Box 39, Iran.
This research investigated the sound insulation performance of 3D woven hybrid fabric-reinforced composites using natural fibers, such as jute, along with E-glass and biomass derived from agro-waste, e.g., coffee husk and waste palm fiber.
View Article and Find Full Text PDFThe Effect of Erosive Media on the Mechanical Properties of CAD/CAM Composite Materials.
J Funct Biomater
October 2024
Division of Dentistry, School of Medical Sciences, University of Manchester, Manchester M13 9PL, UK.
This study aimed to investigate the effect of acidic media storage (gastric acid and Coca-Cola) on the mechanical properties of CAD/CAM materials. Three types of materials were tested: a polymer-infiltrated ceramic network (PICN) (Vita Enamic (En), VITA Zahnfabrik, Germany), a resin composite block (RCB) (Cerasmart (Cs), GC Corp, Japan), and a conventional resin-based composite (Gradia direct (Gr), GC Corp, Japan), which was used as a control. Beam-shaped specimens of each material, with dimensions of 16 mm × 4 mm × 1.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!