How diffraction limits ultrasonic screening in phononic plate composed of a periodic array of resonant slits

Aliyasin Elayouch; Mahmoud Addouche; Philippe Lasaygues; Younes Achaoui; Morvan Ouisse; Abdelkrim Khelif

doi:10.1016/j.crhy.2016.02.006

How diffraction limits ultrasonic screening in phononic plate composed of a periodic array of resonant slits

Aliyasin Elayouch^*, Mahmoud Addouche, Philippe Lasaygues, Younes Achaoui, Morvan Ouisse, Abdelkrim Khelif

^*Corresponding author for this work

Research output: Contribution to journal › Short survey › peer-review

1 Citation (Scopus)

Abstract

We explore experimentally the role played by diffraction in the phenomenon of acoustic shielding provided by a plate that is periodically perforated with subwavelength slits and immersed in water. We carried out ultrasonic transmission measurements for all directions of propagation in order to check the omnidirectionality of acoustic shielding. While a single slit acts as a Fabry–Perot resonator in the frequency range of interest, the coupling between adjacent slits provides an attenuation frequency band centered around the resonant frequency that is mostly independent of the angle of incidence. Beyond the incident angle of 45 degrees, however, we observe the appearance of scattered radiation that limits the attenuation of ultrasound. This spurious scattering is shown to arise from diffraction by the grating of slits.

Original language	English
Pages (from-to)	518-523
Number of pages	6
Journal	Comptes Rendus Physique
Volume	17
Issue number	5
DOIs	https://doi.org/10.1016/j.crhy.2016.02.006
Publication status	Published - 2016
Externally published	Yes

Keywords

Acoustic metamaterials
Acoustic screening
Diffraction
Fabry–Perot acoustic resonator

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10.1016/j.crhy.2016.02.006

Cite this

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title = "How diffraction limits ultrasonic screening in phononic plate composed of a periodic array of resonant slits",

abstract = "We explore experimentally the role played by diffraction in the phenomenon of acoustic shielding provided by a plate that is periodically perforated with subwavelength slits and immersed in water. We carried out ultrasonic transmission measurements for all directions of propagation in order to check the omnidirectionality of acoustic shielding. While a single slit acts as a Fabry–Perot resonator in the frequency range of interest, the coupling between adjacent slits provides an attenuation frequency band centered around the resonant frequency that is mostly independent of the angle of incidence. Beyond the incident angle of 45 degrees, however, we observe the appearance of scattered radiation that limits the attenuation of ultrasound. This spurious scattering is shown to arise from diffraction by the grating of slits.",

keywords = "Acoustic metamaterials, Acoustic screening, Diffraction, Fabry–Perot acoustic resonator",

author = "Aliyasin Elayouch and Mahmoud Addouche and Philippe Lasaygues and Younes Achaoui and Morvan Ouisse and Abdelkrim Khelif",

note = "Publisher Copyright: {\textcopyright} 2016 Acad{\'e}mie des sciences",

year = "2016",

doi = "10.1016/j.crhy.2016.02.006",

language = "English",

volume = "17",

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journal = "Comptes Rendus Physique",

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TY - JOUR

T1 - How diffraction limits ultrasonic screening in phononic plate composed of a periodic array of resonant slits

AU - Elayouch, Aliyasin

AU - Addouche, Mahmoud

AU - Lasaygues, Philippe

AU - Achaoui, Younes

AU - Ouisse, Morvan

AU - Khelif, Abdelkrim

PY - 2016

Y1 - 2016

N2 - We explore experimentally the role played by diffraction in the phenomenon of acoustic shielding provided by a plate that is periodically perforated with subwavelength slits and immersed in water. We carried out ultrasonic transmission measurements for all directions of propagation in order to check the omnidirectionality of acoustic shielding. While a single slit acts as a Fabry–Perot resonator in the frequency range of interest, the coupling between adjacent slits provides an attenuation frequency band centered around the resonant frequency that is mostly independent of the angle of incidence. Beyond the incident angle of 45 degrees, however, we observe the appearance of scattered radiation that limits the attenuation of ultrasound. This spurious scattering is shown to arise from diffraction by the grating of slits.

AB - We explore experimentally the role played by diffraction in the phenomenon of acoustic shielding provided by a plate that is periodically perforated with subwavelength slits and immersed in water. We carried out ultrasonic transmission measurements for all directions of propagation in order to check the omnidirectionality of acoustic shielding. While a single slit acts as a Fabry–Perot resonator in the frequency range of interest, the coupling between adjacent slits provides an attenuation frequency band centered around the resonant frequency that is mostly independent of the angle of incidence. Beyond the incident angle of 45 degrees, however, we observe the appearance of scattered radiation that limits the attenuation of ultrasound. This spurious scattering is shown to arise from diffraction by the grating of slits.

KW - Acoustic metamaterials

KW - Acoustic screening

KW - Diffraction

KW - Fabry–Perot acoustic resonator

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U2 - 10.1016/j.crhy.2016.02.006

DO - 10.1016/j.crhy.2016.02.006

M3 - Short survey

AN - SCOPUS:84959419321

SN - 1631-0705

VL - 17

SP - 518

EP - 523

JO - Comptes Rendus Physique

JF - Comptes Rendus Physique

IS - 5

ER -

How diffraction limits ultrasonic screening in phononic plate composed of a periodic array of resonant slits

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