Comparative analysis of random incidence scattering coefficients for slat and slot structures with various geometric parameters

이효진 Lee

doi:10.7776/ASK.2026.45.5.521

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2026 Vol.45, Issue 5 Preview Page Next Page

Comparative analysis of random incidence scattering coefficients for slat and slot structures with various geometric parameters 슬랫 및 슬롯 구조의 기하학적 변수에 따른 랜덤입사 산란계수 비교 분석

30 September 2026. pp. 521-527

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Abstract

Panel type slat and slot structures have been widely used not only as architectural finishes but also as acoustic control elements. However, systematic studies on the effects of geometric parameters, including thickness and width, on sound scattering characteristics and their frequency dependence remain limited. This study investigated the scattering characteristics of slat and slot structures by comparing random incidence scattering coefficients obtained from wave based acoustic analysis. The results showed that random incidence scattering coefficients generally increased with increasing slat thickness and slot width. Regarding structural configuration, slat structures exhibited relatively smooth and flat frequency responses over the entire frequency range, whereas slot structures showed distinct peaks at specific frequency bands due to quarter wavelength resonance within the slots, resulting in greater variation with frequency. In addition, higher coverage and opening ratios tended to shift the dominant scattering band toward higher frequencies, while mid frequency scattering coefficients decreased markedly at 30 %. For a slat thickness and slot width of 3 cm, the highest scattering coefficients for both structures were observed at a coverage or opening ratio of 15 %.

Keywords

Slat and slot structures

Diffuser

Acoustic scattering

Scattering coefficient

Wave based acoustic analysis

최근 패널 형태의 슬랫 및 슬롯 구조가 건축 마감재를 넘어 음향 제어재로 광범위하게 활용되고 있으나, 이들 구조의 두께와 폭을 비롯한 기하학적 변수가 음향 산란 특성의 주파수별 변화에 미치는 영향에 관한 체계적인 연구는 여전히 미비한 실정이다. 이에 본 연구에서는 슬랫 및 슬롯 구조의 기하학적 변화에 따른 음향 산란 특성을 규명하고자 파동음향해석을 통해 랜덤입사 산란계수를 비교·분석하였다. 해석 결과, 슬랫의 두께와 슬롯의 폭이 커질수록 랜덤입사 산란계수가 전반적으로 상승하는 경향을 확인하였다. 구조 형태에 따른 특성을 살펴보면, 슬랫 구조는 전 주파수 대역에서 상대적으로 완만하고 평탄한 산란 분포를 나타낸 반면, 슬롯 구조는 내부의 λ/4 공명 특성으로 의해 특정 주파수 대역에서 뚜렷한 산란 피크가 형성되며, 산란계수의 주파수별 변동이 상대적으로 크게 나타났다. 아울러 피복률 및 개구율이 높아질수록 주요 산란 대역이 고주파수 측으로 이동하는 경향을 보였으며, 30 % 조건에서는 중주파수 대역의 산란계수가 크게 감소하였다. 특히 슬랫 두께와 슬롯 폭이 각각 3 cm인 조건에서는 두 구조 모두 피복률 또는 개구율이 15 %일 때 가장 높은 산란 성능을 나타냈다.

키워드

슬랫 및 슬롯 구조

확산체

음향 산란

산란계수

파동음향해석

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 45
No :5
Pages :521-527
Received Date : 2026-07-27
Accepted Date : 2026-08-19
DOI :https://doi.org/10.7776/ASK.2026.45.5.521

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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