Low frequency sound absorption improvement in refrigerator using multi perforated plate

Ho-Jin Kwon; Hyoung-Jin Kim; Kyungjun Song; Tae-hoon Kim; Junhyo Koo

doi:10.7776/ASK.2022.41.6.723

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2022 Vol.41, Issue 6 Preview Page

Research Article

Low frequency sound absorption improvement in refrigerator using multi perforated plate 다공판을 활용한 냉장고 저주파 흡음개선

30 November 2022. pp. 723-729

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Abstract

In this study, the multi perforated plate is used to reduce the compressor noise in the low frequency band inside the refrigerator machine room. To predict the sound absorption results, the impedance of the sound absorption material is measured. Using the measured impedance results, it is confirmed that the results used for FEM analysis is almost similar to the experimental values. The sound-absorbing structure that can operate in the target frequency band inside the refrigerator machine room is designed by controlling the hole diameter and arrangement in the perforated plate. The effect of reducing noise in the low frequency band is confirmed by applying perforated plate-based sound absorbing structures to the machine room.

Keywords

Multi perforated plate

Absorption coefficient

Impedance

Finite Element Method (FEM)

본 논문은 냉장고 기계실 내부 압축기의 저주파 대역에서 소음을 줄이기 위해 다공판을 사용하는 연구이다. 흡음 결과를 예측하기 위해 흡음재의 표면 임피던스를 측정하여, 측정된 임피던스 결과를 이용하여 Finite Element Method(FEM) 분석에 사용된 결과가 실험값과 거의 유사함을 확인하였다. 다공판의 구멍 직경과 배치를 조절하여 냉장고 기계실 내부의 목표 주파수 대역에서 동작할 수 있는 흡음구조를 설계하였다. 기계실에 다공판과 흡음재를 결합한 흡음구조를 적용하여 기존의 흡음재의 주파수 대역보다 낮아진 저주파대역 소음저감 효과를 확인하였다.

키워드

다공판

흡음률

임피던스

유한요소해석

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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 : 41
No :6
Pages :723-729
Received Date : 2022-09-23
Revised Date : 2022-10-25
Accepted Date : 2022-11-01
DOI :https://doi.org/10.7776/ASK.2022.41.6.723

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

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