N2 - Research on acoustical hoods used in industry has been widely discussed; however, the assessment of shape optimization on space-constrained close-fitting acoustic hoods by adjusting design parameters has been neglected. Moreover, the acoustical performance for a one-layer acoustic hood used in a high intensity environment seems to be insufficient. Therefore, an assessment of an optimally shaped acoustical hood with two layers will be proposed. In this paper, a numerical case for depressing the noise level of a piece of equipment by optimally designing a shaped two-layer close-fitting acoustic hood under a constrained space will be introduced. Furthermore, to optimally search for a better designed set for the multi-layer acoustical hood, an artificial immune method (AIM) has been adopted as well. Consequently, this paper provides a quick and effective method to reduce equipment noise by optimally designing a shaped multi-layer close-fitting acoustic hood via the AIM searching technique. L1 - http://www.czasopisma.pan.pl/Content/101588/PDF/06_paper.pdf L2 - http://www.czasopisma.pan.pl/Content/101588 PY - 2012 IS - No 2 EP - 188 DO - 10.2478/v10168-012-0024-5 KW - Multi-layer KW - close-fitting acoustical hood KW - artificial immune method A1 - Chiu, Min-Chie PB - Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics VL - vol. 37 DA - 2012 T1 - Shape Optimization of Two-layer Acoustical Hoods Using an Artificial Immune Method SP - 181 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/101588 T2 - Archives of Acoustics