A Mathematical Images Group Model to Estimate the Sound Level in a Close-Fitting Enclosure

Figure 3

Plan view of the 𝑥-𝑦 plane showing image groups. (Main group 1 from Figure 2 for multiple machine radiating surface and enclosure front wall images. It can be viewed as a discrete line-type source.) (Group A) The ceiling (A4) and floor (A5) images of the main group 1. (Group B) The left bulkhead (B3) and right bulkhead (B2) images of the main group 1. (Group C) The ceiling (C8) images of the left bulkhead image group (B3) with ceiling image group (A4). The floor (C9) images of the left bulkhead image group (B3) with floor image group (A5). (Group D) The ceiling (D6) images of the right bulkhead image group (B2) with ceiling image group (A4). The floor (D7) images of the right bulkhead image group (B2) with floor image group (A5). Each group can be viewed as distinct line-type sources perpendicular to the layout page. The main group is one distinct line-type source.