@article {Park:2023:0736-2935:4239,
title = "Movement tracking using asymmetric impedance meta-surface based on Helmholtz resonator",
journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings",
parent_itemid = "infobike://ince/incecp",
publishercode ="ince",
year = "2023",
volume = "268",
number = "4",
publication date ="2023-11-30T00:00:00",
pages = "4239-4244",
itemtype = "ARTICLE",
issn = "0736-2935",
url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2023/00000268/00000004/art00028",
doi = "doi:10.3397/IN_2023_0599",
author = "Park, Jaehyeon and Kim, Jedo",
abstract = "Acoustic sensors are one of the most commonly used sensors for detecting obstacles in mobile robots and vehicles by providing distance information of the obstacles in their path. However, although a single sensor can determine an object's distance, two or more sensors must be used to
detect the movement of an object. Here, we propose a method to determine the distance and direction of an object traveling to a single sensor using an asymmetrically formed acoustic field. The acoustic field is formed by impedance-varying acoustic meta-surface using an asymmetric Helmholtz
resonator array. We present multi-physics simulations using COMSOL and experimental results which show the movement of an acoustic source using a single microphone. Also, we present, explicitly, the effective material parameter variation made by the meta-surface with varying degrees of internal
neck lengths.",
}