Sound reception system by an acoustic meta-lens

Sang Hoon Kim; Byeong Won Ahn; Kyung Min Park; Gung Su Lim; Mukunda P. Das

doi:10.1080/25725084.2021.1923933

Sound reception system by an acoustic meta-lens

Sang Hoon Kim^*, Byeong Won Ahn, Kyung Min Park, Gung Su Lim, Mukunda P. Das

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Applying the directionality of an acoustic meta-lens, a sound reception system for ships is designed. A two-dimensional disk shape acoustic meta-lens or an acoustic Luneburg lens made of 253 acrylic pipes of different radii which control the refractive index is used. The lens has the diameter of 180 cm and the thickness of 20 cm. Eight microphones were installed around the edges of the lens because the lens focuses the input signal into the edge of the other side of the lens. The sound reception ability of the lens was tested on the sea using the horn of a university training ship as an emitter and the lens loaded on a small boat as a receiver. Both are moving at 20 ~ 40 km/h at a distance between 300 ~ 700 m. The lens could focus to recognize the direction of the input sound in the frequency range between 300 and 900 Hz. ABBREVIATIONS IMO: International Maritime Organization ALL: Acoustic Luneburg Lens SRS: Sound Reception System.

Original language	English
Pages (from-to)	56-61
Number of pages	6
Journal	Journal of International Maritime Safety, Environmental Affairs, and Shipping
Volume	5
Issue number	2
DOIs	https://doi.org/10.1080/25725084.2021.1923933
Publication status	Published - 2021

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10.1080/25725084.2021.1923933

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title = "Sound reception system by an acoustic meta-lens",

abstract = "Applying the directionality of an acoustic meta-lens, a sound reception system for ships is designed. A two-dimensional disk shape acoustic meta-lens or an acoustic Luneburg lens made of 253 acrylic pipes of different radii which control the refractive index is used. The lens has the diameter of 180 cm and the thickness of 20 cm. Eight microphones were installed around the edges of the lens because the lens focuses the input signal into the edge of the other side of the lens. The sound reception ability of the lens was tested on the sea using the horn of a university training ship as an emitter and the lens loaded on a small boat as a receiver. Both are moving at 20 ~ 40 km/h at a distance between 300 ~ 700 m. The lens could focus to recognize the direction of the input sound in the frequency range between 300 and 900 Hz. ABBREVIATIONS IMO: International Maritime Organization ALL: Acoustic Luneburg Lens SRS: Sound Reception System.",

keywords = "Sound reception system, acoustic measurement, acoustic meta-lens, navigation safety",

author = "Kim, {Sang Hoon} and Ahn, {Byeong Won} and Park, {Kyung Min} and Lim, {Gung Su} and Das, {Mukunda P.}",

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T1 - Sound reception system by an acoustic meta-lens

AU - Kim, Sang Hoon

AU - Ahn, Byeong Won

AU - Park, Kyung Min

AU - Lim, Gung Su

AU - Das, Mukunda P.

PY - 2021

Y1 - 2021

N2 - Applying the directionality of an acoustic meta-lens, a sound reception system for ships is designed. A two-dimensional disk shape acoustic meta-lens or an acoustic Luneburg lens made of 253 acrylic pipes of different radii which control the refractive index is used. The lens has the diameter of 180 cm and the thickness of 20 cm. Eight microphones were installed around the edges of the lens because the lens focuses the input signal into the edge of the other side of the lens. The sound reception ability of the lens was tested on the sea using the horn of a university training ship as an emitter and the lens loaded on a small boat as a receiver. Both are moving at 20 ~ 40 km/h at a distance between 300 ~ 700 m. The lens could focus to recognize the direction of the input sound in the frequency range between 300 and 900 Hz. ABBREVIATIONS IMO: International Maritime Organization ALL: Acoustic Luneburg Lens SRS: Sound Reception System.

AB - Applying the directionality of an acoustic meta-lens, a sound reception system for ships is designed. A two-dimensional disk shape acoustic meta-lens or an acoustic Luneburg lens made of 253 acrylic pipes of different radii which control the refractive index is used. The lens has the diameter of 180 cm and the thickness of 20 cm. Eight microphones were installed around the edges of the lens because the lens focuses the input signal into the edge of the other side of the lens. The sound reception ability of the lens was tested on the sea using the horn of a university training ship as an emitter and the lens loaded on a small boat as a receiver. Both are moving at 20 ~ 40 km/h at a distance between 300 ~ 700 m. The lens could focus to recognize the direction of the input sound in the frequency range between 300 and 900 Hz. ABBREVIATIONS IMO: International Maritime Organization ALL: Acoustic Luneburg Lens SRS: Sound Reception System.

KW - Sound reception system

KW - acoustic measurement

KW - acoustic meta-lens

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JO - Journal of International Maritime Safety, Environmental Affairs, and Shipping

JF - Journal of International Maritime Safety, Environmental Affairs, and Shipping

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Sound reception system by an acoustic meta-lens

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