@article {Oshima:2016:0736-2935:1629,
title = "Acoustic Absorption Mapping: Wide-area Estimation of Ground Acoustic Absorption Coefficient Using Airborne Hyperspectral Imagery",
journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings",
parent_itemid = "infobike://ince/incecp",
publishercode ="ince",
year = "2016",
volume = "253",
number = "7",
publication date ="2016-08-21T00:00:00",
pages = "1629-1636",
itemtype = "ARTICLE",
issn = "0736-2935",
url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2016/00000253/00000007/art00090",
author = "Oshima, Takuya and Hiraguri, Yasuhiro and Okuzono, Takeshi and Tomiku, Reiji and Okamoto, Noriko and Otsuru, Toru",
abstract = "Recent advances in outdoor acoustic simulation techniques and propagation modeling have enabled wide-area environmental noise assessment as notably represented by noise mapping. However, among main input information for such an assessment, ground acoustic properties are not available
as a geographical dataset whereas topography is readily obtainable as a digital surface model. In this paper, a wide-area estimation technique of the ground acoustic absorption coefficient using remote sensing is explored. The selected sensor is a CASI-3 airborne hyperspectral imager, which
provides high spectral and spatial resolutions in visible and near-infrared optical wavelengths. Hyperspectral images of 34 bands with a ground sampling distance of 1m were acquired for a region of approximately 3400 x 4200 square meters. Simultaneously, the ground acoustic properties were
measured using an in-situ technique at 8 locations in the imaged region, each of which has 36 measurement points. A modeling process using a multiple regression analysis derived a set of equations that estimates the acoustic absorption coefficient from the 160 to the 3150Hz one-third-octave
bands using the significant 3 bands of the optical spectral reflectance. The acoustic absorption map obtained by applying the derived model to the entire image qualitatively matches the known properties for various ground types.",
}