Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Solid-state acoustic metamaterial and method of using same to focus sound

一种声音、声子晶体的技术，应用在声学超材料领域，能够解决降低声子晶体实践性等问题

Inactive Publication Date: 2012-05-30
THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIV OF ARIZONA
View PDF13 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the use of fluids reduces the practicality of this phononic crystal in terms of fabrication and use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Solid-state acoustic metamaterial and method of using same to focus sound
  • Solid-state acoustic metamaterial and method of using same to focus sound
  • Solid-state acoustic metamaterial and method of using same to focus sound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0019] Simulates the behavior of a steel rubber lens at 520kHz. All geometric parameters are the same as in the paper by Sukhovich et al. The only difference is that methanol (fluid) is replaced by C l = 1200m / s and C t = 20m / s rubber (solid) instead. Viscoelasticity is not involved for now. The sound source is the same as Sukhovich et al., located to the left of the lens.

[0020] figure 1 The absolute value of the pressure averaged over a period of time is given in . The image point is to the right of the lens. figure 1 showed that the rubber / steel lens exhibits negative refraction to obtain the image of the source.

[0021] figure 2 The instantaneous pressure field is given in and shows the near-spherical waves emanating from the source and the image. exist image 3 The same focusing is observed in the image 3 The vertical co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A phonemic crystal is made of a first solid medium having a first density and a substantially periodic array of structures disposed in the first medium, the structures being made of a second solid medium having a second density different from the first density. The first medium has a speed of propagation of longitudinal sound waves and a speed of propagation of transverse sound waves, the speed of propagation of longitudinal sound waves being approximately that of a fluid, and the speed of the propagation of transverse sound waves being smaller than the speed of propagation of longitudinal sound waves.

Description

[0001] References to related applications [0002] This application claims priority to US Provisional Applications 61 / 208,928, filed March 2, 2009, and 61 / 175,149, filed May 4, 2009, the disclosures of both of which are incorporated by reference in their entirety into this disclosure. field of invention [0003] The present invention relates to acoustic metamaterials, and more particularly to acoustic metamaterials with solid phononic crystals. The invention also relates to methods of focusing sound using such metamaterials. Background technique [0004] Sukhovich et al. in "Experimental and theoretical evidence for subwavelength imaging in phonic crystals", Physical Review Letters 102, 154301 (2009) (which is hereby incorporated by reference in its entirety) disclose a To obtain super-resolution phononic crystals. The phononic crystal comprises a triangular lattice containing stainless steel rods in a space filled with methanol. When surrounded by water, the phononic cry...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/18G10K11/24G10K11/00
CPCG10K11/26G10K11/165G10K11/00G10K11/18G10K11/24
Inventor 皮埃尔·A·戴米耶海梅·布贾伊巴萨姆·梅尔赫布
Owner THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIV OF ARIZONA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com