The Study on Feasibility of the Beamforming based Acoustic Camera to Detect Air Infiltration of an Apartment Building

Byung-Chang Kwag; Gil-Tae Kim; Won-Gil Ji; Tae-Min Kim

doi:10.22696/jkiaebs.20200057

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2020 Vol.14, Issue 6 Preview Page Next Page

Research Article

The Study on Feasibility of the Beamforming based Acoustic Camera to Detect Air Infiltration of an Apartment Building 빔포밍 방식 음향 카메라를 활용한 공동주택 기밀성능 측정 연구

30 December 2020. pp. 674-686

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Abstract

The purpose of this paper was to investigate the feasibility of the beamforming algorithm-based acoustic method with a microphone array to analyze the airtightness of buildings. Performing the field tests, the impacts of various factors related to the acoustic and airtightness performances were analyzed. From the analysis, it was found that high frequency sound waves were feasible to detect air leakage spots on the exterior wall for the acoustic approach. When comparing the sound pressure levels detected by the acoustic camera with a calibrated microphone for the verification analysis, the averaged percent differences between two instruments was 3% proving the reliability of the acoustic camera method. However, in order to produce the reliable results, this paper also found that it needs to combine the sound pressure levels of the leakage spots detected by the acoustic camera. Based on these results, this paper could conclude that it is possible to evaluate the airtightness of an exterior wall using a microphone array, based on the resulting correlation between the changes in air leakages and sound pressure level differences.

Keywords

Apartment house

Infiltration

Acoustic approach

Beamforming algorithm

키워드

공동주택

기밀

음향기법

빔포밍 알고리즘

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Information

Publisher :Korean Institute of Architectural Sustainable Environment and Building Systems
Publisher(Ko) :한국건축친환경설비학회
Journal Title :Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
Journal Title(Ko) :한국건축친환경설비학회논문집
Volume : 14
No :6
Pages :674-686
Received Date : 2020-10-27
Revised Date : 2020-11-26
Accepted Date : 2020-11-28
DOI :https://doi.org/10.22696/jkiaebs.20200057

Journal of Korean Institute of Architectural Sustainable Environment and Building Systems ISSN:1976-6483(Print) 2586-0666(Online) 한국건축친환경설비학회논문집

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