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2020 Vol.52, Issue 1 Preview Page
Sound Absorption Coefficient and Sound Transmission Loss of Porous Sponge Attached Corrugated Cardboard of Noise Insulation Cover

다공스펀지 부착 골판지 소음저감덮개의 흡음률과 음향투과손실

Chun-Won Kang1
,
Mina K. Kim2
,
Eun-Suk Jang3‡
,
Yong-Hun Lee4
,
Sang-Sik Jang5†
강춘원 1
,
김미나경민 2
,
장은석 3‡
,
이용훈 4
,
장상식 5†
1Dept. of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Jeonbuk Natl. Univ.
2Dept. of Food Science & Human Nutrition, and Research Institute of Human Ecology, College of Human Ecology, Jeonbuk Natl. Univ.
3Dept. of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Jeonbuk Natl. Univ.
4Dept. of Mathematics, College of Natural Science, Jeonbuk Natl. Univ.
5Dept. of Biobased Materials, College of Agriculture & Life Sciences, Chungnam Natl. Univ.
1전북대학교 생활과학대학 주거환경학과, 교수
2전북대학교 생활과학대학 식품영양학과, 교수
3전북대학교 생활과학대학 주거환경학과, 학생
4전북대학교 자연과학대학 수학과, 교수
5충남대학교 농업생명과학대학 환경소재공학과, 교수
†Corresponding author: E-Mail: ssjang@cnu.ac.kr (Address: Dept. of Biobased Materials, College of Agriculture & Life Sciences, Chungnam Natl. Univ., Daejeon, 34134, Republic of Korea)
‡Co-corresponding Author: E-Mail: esjang@sambosc.com (Address: Dept. of Housing Environmental Design, and Research Institute of Human Ecology, College of Human Ecology, Jeonbuk Natl. Univ., Jeonju, 54896, Republic of Korea)
28 February 2020. pp. 38-44
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Abstract

The objective of this study is to estimate the noise control capability of a sound barrier developed using a porous sponge attached to a corrugated cardboard (CC) specifically for household blender (BL). The sound absorption coefficient and transmission loss of a triple tri-wall CC are estimated by the transfer-function and transfer-matrix methods, respectively. The sound pressure levels of the BL, CC-covered BL, and porous sponge attached to the CC-covered BL are estimated using a 1/3-octave sound pressure level meter. The mean sound absorption coefficients of a double-layered 1.5 cm thick CC and 3 cm thick porous sponge attached to a double-layered 1.5 cm thick CC are 0.10 and 0.58, respectively. In the case of the porous sponge attached to the CC-covered BL, the sound absorption coefficient value reached 0.82 in the frequency range 3–4 KHz. The mean sound transmission loss of the CC and porous sponge attached to the CC-covered BL are 50.70 and 64.74 dB, respectively. The sound pressure level of the BL, CC, and porous sponge attached to the CC-covered BL are 82.9, 65.7, and 61.2 dB, respectively. The difference in the sound pressure level between the BL and the porous sponge attached to the CC-covered BL is about 20 dB. The findings from this study can be used in potential applications for using porous sponges attached to a CC-covered BL as a noise insulation cover for household BL.

Keywords
Corrugated cardboard
porous sponge
sound absorption coefficient
sound transmission loss
transfer function method
transfer matrix method
References

Literature Cited

1

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2

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3

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 52
  • No :1
  • Pages :38-44
  • Received Date : 2020-01-14
  • Revised Date : 2020-02-13
  • Accepted Date : 2020-02-14
  • DOI :https://doi.org/10.7584/JKTAPPI.2020.02.52.1.38
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