Please wait a minute...
Chin. Phys. B, 2022, Vol. 31(11): 114301    DOI: 10.1088/1674-1056/ac6b20
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

An improved lumped parameter model predicting attenuation of earmuff with air leakage

Xu Zhong(仲旭), Zhe Chen(陈哲), and Dong Zhang(章东)
Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China
Abstract  Since air leakage is inevitable when earmuffs are worn improperly or together with safety glasses in factory or military, it is required to be considered to accurately predict earmuff attenuation. Besides unwanted air leakage, under controlled air leakage is introduced to earmuff to achieve adjustable attenuations in different signal-to-noise ratios (SNRs) and balance between attenuation and speech intelligibility. This work is to develop an improved lumped parameter model (LPM) to predict earmuff attenuation with consideration of air leakage. Air leakage paths are introduced into conventional LPM without air leakage, and air leakage path impedance is analytically described by Maa's microperforated tube impedance. Earmuff passive attenuation behavior can be analytically described and analyzed with the improved LPM. Finally, the validity of improved LPM is verified experimentally. The results indicate that the improved LPM can predict earmuff attenuation with air leakage, and air leakage deteriorates earmuff attenuation and turns resonance frequency higher.
Keywords:  earmuff      lumped parameter model      air leakage      attenuation  
Received:  05 January 2022      Revised:  22 April 2022      Accepted manuscript online:  28 April 2022
PACS:  43.20.+g (General linear acoustics)  
  43.20.Rz (Steady-state radiation from sources, impedance, radiation patterns, boundary element methods)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11934009 and 11874216).
Corresponding Authors:  Dong Zhang     E-mail:  dzhang@nju.edu.cn

Cite this article: 

Xu Zhong(仲旭), Zhe Chen(陈哲), and Dong Zhang(章东) An improved lumped parameter model predicting attenuation of earmuff with air leakage 2022 Chin. Phys. B 31 114301

[1] Carillo K, Sgard F and Doutres O 2018 Appl. Acoust. 134 25
[2] Bai M R, Pan W and Chen H 2018 J. Acoust. Soc. Am. 143 1613
[3] Zwislocki J 1955 J. Acoust. Soc. Am. 27 146
[4] Shaw E A G and Thiessen G J 1958 J. Acoust. Soc. Am. 30 24
[5] Shaw E A G and Thiessen G J 1962 J. Acoust. Soc. Am. 34 1233
[6] Du Y and Homma K 2009 Noise Control Eng. J. 57 459
[7] Zhong X and Zhang D 2021 Appl. Acoust. 176 107870
[8] Wang C, Zhou Y Q, Shen G W, Wu W W and Ding W 2013 Chin. Phys. B 22 124601
[9] Gaudreau M A, Sgard F, Laville F and Nélisse H 2017 Appl. Acoust. 119 66
[10] Li Y M, Li B K, Qi F S and Wang X C 2017 Chin. Phys. B 26 024701
[11] Boyer S, Doutres O, Sgard F, Laville F and Boutin J 2014 Appl. Acoust. 83 76
[12] Allen C H and Berger E H 1990 Noise Control Eng. J. 34 97
[13] Paakkonen R 1992 Noise Control Eng. J. 38 59
[14] Paurobally M R and Pan J 2000 Appl. Acoust. 60 293
[15] Kalb J T 2013 https://apps.dtic.mil/dtic/tr/fulltext/u2/a598427
[16] Maa D Y 1998 J. Acoust. Soc. Am. 104 2861
[17] Fernandes J C 2003 Appl. Acoust. 64 581
[18] Pan J, Hansen C H and Bies D A 1992 J. Sound Vib. 156 349
[19] M?yński R and Koz?owski E 2013 Int. J. Occup. Saf. Ergon. 19 127
[20] Xie S H, Fang X, Li P Q, Huang S, Peng Y G, Shen Y X, Li Y and Zhu X F 2020 Chin. Phys. Lett. 37 054301
[21] Luo Y T, Li P Q, Li D T, Peng Y G, Geng Z G, Xie S H, Li Y, Alú A, Zhu J and Zhu X F 2020 Research 2020 8757403
[22] Shen Y X and Zhu X F 2022 J. Acoust. Soc. Am. 151 96
[1] Measuring stellar populations, dust attenuation and ionized gas at kpc scales in 10010 nearby galaxies using the integral field spectroscopy from MaNGA
Niu Li(李牛) and Cheng Li(李成). Chin. Phys. B, 2023, 32(3): 039801.
[2] Effect of porous surface layer on wave propagation in elastic cylinder immersed in fluid
Na-Na Su(苏娜娜), Qing-Bang Han(韩庆邦), Ming-Lei Shan(单鸣雷), and Cheng Yin(殷澄). Chin. Phys. B, 2023, 32(1): 014301.
[3] Effect of viscosity on stability and accuracy of the two-component lattice Boltzmann method with a multiple-relaxation-time collision operator investigated by the acoustic attenuation model
Le Bai(柏乐), Ming-Lei Shan(单鸣雷), Yu Yang(杨雨), Na-Na Su(苏娜娜), Jia-Wen Qian(钱佳文), and Qing-Bang Han(韩庆邦). Chin. Phys. B, 2022, 31(3): 034701.
[4] Protein-membrane interactions investigated with surface-induced fluorescence attenuation
Li Ma(马丽), Ying Li(李颖), Ming Li(李明), Shuxin Hu(胡书新). Chin. Phys. B, 2017, 26(12): 128708.
[5] Gamma-radiation effects in pure-silica-core photonic crystal fiber
Wei Cai(蔡伟), Ningfang Song(宋凝芳), Jing Jin(金靖), Jingming Song(宋镜明), Wei Li(李伟), Wenyong Luo(罗文勇), Xiaobin Xu(徐小斌). Chin. Phys. B, 2017, 26(11): 114211.
[6] Effect of radiation-induced color centers absorption in optical fibers on fiber optic gyroscope for space application
Jing Jin(金靖), Ya Li(李亚), Zu-Chen Zhang(张祖琛), Chun-Xiao Wu(吴春晓), Ning-Fang Song(宋凝芳). Chin. Phys. B, 2016, 25(8): 084213.
[7] Properties of sound attenuation around a two-dimensional underwater vehicle with a large cavitation number
Ye Peng-Cheng (叶鹏程), Pan Guang (潘光). Chin. Phys. B, 2015, 24(6): 066401.
[8] Relationships of the internodal distance of biological tissue with its sound velocity and attenuation at high frequency in doublet mechanics
Cheng Kai-Xuan (程凯旋), Wu Rong-Rong (吴融融), Liu Xiao-Zhou (刘晓宙), Liu Jie-Hui (刘杰惠), Gong Xiu-Fen (龚秀芬), Wu Jun-Ru (吴君汝). Chin. Phys. B, 2015, 24(4): 044302.
[9] Passive decoy-state quantum key distribution using weak coherent pulses with modulator attenuation
Li Yuan (李源), Bao Wan-Su (鲍皖苏), Li Hong-Wei (李宏伟), Zhou Chun (周淳), Wang Yang (汪洋). Chin. Phys. B, 2015, 24(11): 110307.
[10] Radiation-induced attenuation self-compensating effect in super-fluorescent fiber source
Yang Yuan-Hong (杨远洪), Suo Xin-Xin (索鑫鑫), Yang Wei (杨巍). Chin. Phys. B, 2014, 23(9): 094213.
[11] A generalized method of converting CT image to PET linear attenuation coefficient distribution in PET/CT imaging
Wang Lu (王璐), Wu Li-Wei (武丽伟), Wei Le (魏乐), Gao Juan (高娟), Sun Cui-Li (孙翠丽), Chai Pei (柴培), Li Dao-Wu (李道武). Chin. Phys. B, 2014, 23(2): 027802.
[12] Absorption characteristic of arc plasma in the infrared region
Chen Yun-Yun(陈云云),Song Yang(宋旸), Li Zhen-Hua(李振华),and He An-Zhi(贺安之). Chin. Phys. B, 2011, 20(3): 034201.
[13] Evolution of sum-chirp in polarization multiplexed communication system
Wang Jing (王晶), Wang Zhen-Li (王珍丽). Chin. Phys. B, 2004, 13(6): 877-881.
No Suggested Reading articles found!