WO2010101910A2 - Solid-state acoustic metamaterial and method of using same to focus sound - Google Patents
Solid-state acoustic metamaterial and method of using same to focus sound Download PDFInfo
- Publication number
- WO2010101910A2 WO2010101910A2 PCT/US2010/025909 US2010025909W WO2010101910A2 WO 2010101910 A2 WO2010101910 A2 WO 2010101910A2 US 2010025909 W US2010025909 W US 2010025909W WO 2010101910 A2 WO2010101910 A2 WO 2010101910A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- propagation
- speed
- sound waves
- sound
- phononic
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
- G10K11/165—Particles in a matrix
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/24—Methods or devices for transmitting, conducting or directing sound for conducting sound through solid bodies, e.g. wires
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
Definitions
- the present invention is directed to an acoustic metamaterial and more particularly to an acoustic metamaterial having a solid-solid phononic crystal.
- the present invention is further directed to a method of using such a metamaterial to focus sound.
- a solid phononic crystal for sound deadening is disclosed in PCT International Patent Application No. PCT/US2008/086823, published on July 9, 2009, as WO 2009/085693 Al, whose disclosure is hereby incorporated by reference in its entirety into the present disclosure.
- phononic crystal is adapted to perform a function, namely, sound deadening, which is wholly different from that with which the present invention is concerned.
- the phononic crystal disclosed in that application comprises a first medium (rubber) having a first density and a substantially periodic array of structures disposed in the first medium, the structures being made of a second medium (air) having a second density different from the first density.
- the present invention is directed to a phononic crystal in which the fluid of the above-cited Sukhovich et al reference is replaced by a solid material whose longitudinal speed of sound (C;) approaches that of a fluid (e.g., 1500 m/sec for water) and whose transverse speed of sound (C,) is smaller than the longitudinal speed of sound (e.g., less than 100 m/sec).
- a solid material behaves like a fluid because its transverse speed of sound is much lower than its longitudinal speed of sound.
- An example of such a solid material is organic or inorganic rubber. Being made only of solid components, this type of solid metamaterial is a more practical solution for numerous applications.
- the inclusions can be cylindrical (with any shape for the cross section) to form so-called 2D phononic structures or could be spheres (cubes or any other shapes) for making 3D solid/solid metamaterials.
- the tunability of frequency at which metamaterials behave as desired is done by controlling the properties of the constitutive materials as well as the size and geometry of the phononic crystal.
- Fig. 1 is a plot showing the absolute value of pressure, averaged over one period;
- Fig. 2 is a plot showing the instantaneous pressure field;
- Fig. 3 is a plot showing the vertical component of energy flux;
- Fig. 4 is a plot showing a vertical cut through the image;
- Figs. 5A-5C are plots showing bound modes;
- Fig. 6 is a photograph showing construction of a phononic crystal
- Fig. 7 is a schematic diagram showing a holograph acoustic imaging system.
- Figure 1 we report the absolute value of the pressure, averaged over one period.
- the image spot is on the right on the lens.
- Figure 1 shows that the rubber/steel lens exhibits the phenomenon of negative refraction leading to an image of the source.
- a vertical cut (parallel to the surface of the lens) through the image reveals a half width of the image which is smaller than the wavelength of the signal in water, ⁇ (as shown in Figure 4).
- ⁇ the wavelength of the signal in water
- the vertical axis measures intensity of pressure.
- the horizontal axis is a measure of length (m).
- the lower curve is a fit to a Sine function.
- the width of the first peak along the horizontal axis is calculated to be 2 mm.
- Figs. 5A-5C We confirm the existence of slab (lens) bound modes in the rubber/steel system that lead subwavelength imaging, (see Figs. 5A-5C).
- the band structure of a methanol/steel phononic crystal in water is shown in Figs. 5A and 5B (see paper by Sukhovich et at).
- Fig. 5C is the same as Fig. 5A, but for a rubber/steel crystal immersed in water.
- Potential applications include the following.
- Non-invasive imaging techniques such as ultrasound
- ultrasound are relied upon by the medical community for both diagnosis and treatment of numerous conditions. Therefore, improvements in non-invasive imaging techniques result in better health care for patients.
- a potential application is the use of acoustic metamaterial films for imaging the mechanical contrast in organs and tissues. This is an ultrasonic approach that can provide measurements of tissues and organs in any dimension. This technique would complement current imaging techniques such as Doppler ultrasound, which evaluates blood pressure and flow, and Magnetic Resonance Imaging (MRI).
- Doppler ultrasound which evaluates blood pressure and flow
- MRI Magnetic Resonance Imaging
- Holographic imaging with phononic metamaterials has a variety of applications including detecting changes in blood vessel diameter due to clots or damage, measuring arterial stenosis and determining organ enlargement (hypertrophy or hyperplasia) or diminishment (hypotrophy, atrophy, hypoplasia or dystrophy).
- the basic concept of this application would be to design a membrane composed of acoustic metamaterials that upon contact with a tissue and immersion in water can create a detectable holographic image in the water.
- the mechanical contrast in the tissue can be reconstructed by creating a sound grid raster image via a piezoelectric or photoacoustic probe in the water.
- the use of several acoustic metamaterial films, which can image the tissue at various wavelengths (i.e. length scales), can be used to construct a multi-resolution composite image of the tissue through multi-scale signal compounding methods.
- FIG. 7 The concept is illustrated in Figure 7.
- the primary or secondary sound source S in a tissue is imaged through a metamaterial 702 to form an image / in an easily probed medium 706 (e.g., water).
- the narrow arrows show the path of acoustic waves refracted negatively.
- the broad arrows feature some object of interest imaged by the film and illustrate the shape inversion of the object and image.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011553037A JP2012519058A (en) | 2009-03-02 | 2010-03-02 | Solid acoustic metamaterial and how to use it to focus sound |
US13/254,112 US8596410B2 (en) | 2009-03-02 | 2010-03-02 | Solid-state acoustic metamaterial and method of using same to focus sound |
EP10749198A EP2404295A2 (en) | 2009-03-02 | 2010-03-02 | Solid-state acoustic metamaterial and method of using same to focus sound |
KR1020117022775A KR20130020520A (en) | 2009-03-02 | 2010-03-02 | Solid-state acoustic metamaterial and method of using same to focus sound |
CN201080014100XA CN102483913A (en) | 2009-03-02 | 2010-03-02 | Solid-state acoustic metamaterial and method of using same to focus sound |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20892809P | 2009-03-02 | 2009-03-02 | |
US61/208,928 | 2009-03-02 | ||
US17514909P | 2009-05-04 | 2009-05-04 | |
US61/175,149 | 2009-05-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2010101910A2 true WO2010101910A2 (en) | 2010-09-10 |
WO2010101910A3 WO2010101910A3 (en) | 2011-01-13 |
Family
ID=42710188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2010/025909 WO2010101910A2 (en) | 2009-03-02 | 2010-03-02 | Solid-state acoustic metamaterial and method of using same to focus sound |
Country Status (6)
Country | Link |
---|---|
US (1) | US8596410B2 (en) |
EP (1) | EP2404295A2 (en) |
JP (1) | JP2012519058A (en) |
KR (1) | KR20130020520A (en) |
CN (1) | CN102483913A (en) |
WO (1) | WO2010101910A2 (en) |
Cited By (3)
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JP2014215617A (en) * | 2013-04-25 | 2014-11-17 | トヨタ モーター エンジニアリング アンド マニュファクチャリング ノース アメリカ,インコーポレイティド | Process of attenuating elastic and/or acoustic band gap frequency in phononic metamaterial devices and phononic devices |
JP2018142223A (en) * | 2017-02-28 | 2018-09-13 | 旭化成株式会社 | Design method of cloaking element, cloaking element, design system for cloaking element and program |
CN112836416A (en) * | 2021-02-27 | 2021-05-25 | 西北工业大学 | Phononic crystal structure optimization design method for inhibiting elastic wave propagation |
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ATE526658T1 (en) * | 2007-12-21 | 2011-10-15 | 3M Innovative Properties Co | VISCOELASTIC PHONOMIC CRYSTAL |
US8833510B2 (en) * | 2011-05-05 | 2014-09-16 | Massachusetts Institute Of Technology | Phononic metamaterials for vibration isolation and focusing of elastic waves |
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US10065367B2 (en) | 2015-03-20 | 2018-09-04 | Chevron Phillips Chemical Company Lp | Phonon generation in bulk material for manufacturing |
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2010
- 2010-03-02 EP EP10749198A patent/EP2404295A2/en not_active Withdrawn
- 2010-03-02 KR KR1020117022775A patent/KR20130020520A/en not_active Application Discontinuation
- 2010-03-02 WO PCT/US2010/025909 patent/WO2010101910A2/en active Application Filing
- 2010-03-02 CN CN201080014100XA patent/CN102483913A/en active Pending
- 2010-03-02 US US13/254,112 patent/US8596410B2/en not_active Expired - Fee Related
- 2010-03-02 JP JP2011553037A patent/JP2012519058A/en active Pending
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WO2007084318A2 (en) * | 2006-01-13 | 2007-07-26 | The Regents Of The University Of California | Pulse trapping composite granular medium and methods for fabricating such medium |
WO2008097495A1 (en) * | 2007-02-02 | 2008-08-14 | Massachusetts Institute Of Technology | Three-dimensional particles and related methods including interference lithography |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2014215617A (en) * | 2013-04-25 | 2014-11-17 | トヨタ モーター エンジニアリング アンド マニュファクチャリング ノース アメリカ,インコーポレイティド | Process of attenuating elastic and/or acoustic band gap frequency in phononic metamaterial devices and phononic devices |
JP2018142223A (en) * | 2017-02-28 | 2018-09-13 | 旭化成株式会社 | Design method of cloaking element, cloaking element, design system for cloaking element and program |
CN112836416A (en) * | 2021-02-27 | 2021-05-25 | 西北工业大学 | Phononic crystal structure optimization design method for inhibiting elastic wave propagation |
CN112836416B (en) * | 2021-02-27 | 2023-02-28 | 西北工业大学 | Phononic crystal structure optimization design method for inhibiting elastic wave propagation |
Also Published As
Publication number | Publication date |
---|---|
US20120000726A1 (en) | 2012-01-05 |
JP2012519058A (en) | 2012-08-23 |
EP2404295A2 (en) | 2012-01-11 |
KR20130020520A (en) | 2013-02-27 |
CN102483913A (en) | 2012-05-30 |
US8596410B2 (en) | 2013-12-03 |
WO2010101910A3 (en) | 2011-01-13 |
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