An experimental analysis of the sound reduction characteristics of air transparent noise barriers

Chan-Jae  Park; Yong-Soo  Ji; Jae-Hyun  Lim; Chan-Hoon Haan

doi:10.7776/ASK.2016.35.6.491

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2016 Vol.35, Issue 6 Preview Page Next Page

An experimental analysis of the sound reduction characteristics of air transparent noise barriers 통기형 방음벽의 음향감쇠 특성에 대한 실험적 분석

30 November 2016. pp. 491-500

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Abstract

The present study describes the acoustical characteristics of the new noise barriers which can control not only noise but also wind pressure by allowing air flow through barriers. In order to investigate the sound reduction index of the air transparent noise barrier, 17 models in total were examined with various size of openings and the volume of the resonators. As a result, it was found that the sound reduction index varies with the volume of the resonator and the area of the openings. Also, it was revealed that double layer of units has more sound reduction index than the single layer of unit at the frequency band from 400 Hz to 1250 Hz. This denoted that physical features of openings and resonators affect the sound reduction index of the air transparent noise barrier.

Keywords

Air transparent noise barrier

Opening

Resonator

Sound reduction index

Acoustic experiment

본 논문에서는 공기를 통과시켜 풍압을 저감하면서 소음을 제어할 수 있는 새로운 개념의 방음벽의 음향감쇠 특성을 분석하였다. 통기형 방음벽의 소음저감 특성을 조사하기 위하여 우선 개구부의 크기 및 공명기의 체적 등을 변화시켜 총 17가지 방음벽 모델의 음향감쇠계수를 측정하였다. 실험결과 공명기의 체적과 개구부의 면적에 따라 음향감쇠계수 값이 달라지고 있으며, 목표 주파수대역(400 ~ 1250 Hz)에서 단일 방음벽보다 이중 방음벽의 음향감쇠계수가 더 높게 나타났다. 이를 통해 개구부 및 공명기의 물리적 특성이 통기형 방음벽의 차음특성에 영향을 미친다는 점을 밝혀냈다.

키워드

통기형 방음벽

개구부

공명기

음향감쇠계수

음향실험

References

1.Ministry of Environment of Korea, Noise and Vibration Control Act (in Korean), Act No.13805, 2016.

2.Environmental Dispute Resolution Commission, http:// ecc.me.go.kr, 2016.

3.Ministry of Environment of Korea, “Operating report for envi-ronmental noise measuring network in 2013,” (in Korean) Ministry of Environment, 2014.

4.Ministry of Environment of Korea, “Noise and vibration management policy: The actual progress report for local government in 2014,” (in Korean) Ministry of Environment, 2016.

5.Ministry of Environment of Korea, “Noise and vibration management policy: The actual progress report for local government in 2004,” (in Korean) Ministry of Environment, 2005.

6.S. H. Kim and S. H. Lee, “Air transparent soundproof window,” AIP Advances, 1-4 (2013).

7.T. M. Kim and J. T. Kim, “Noise protection roof: Partial opening effect for noise reduction” (in Korean), J. Kr. Soc. Railway. 18, 522-532 (2015).

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9.Ministry of Environment of Korea, Standard of the acoustical performance and installation of noise barrier (in Korean), Notification No.2002-184, 2002.

10.KS F 2808, Laboratory Measurements of Airborne Sound Insulation of Building Elements (in Korean), Korea Standard, 2011.

11.ISO 10140-5, Acoustics - Laboratory Measurement of Sound Insulation of Building Elements, American National Standard, 2010.

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 : 35
No :6
Pages :491-500
Revised Date : 2016-10-31
Accepted Date : 2016-11-25
DOI :https://doi.org/10.7776/ASK.2016.35.6.491

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

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