Triangular foam acoustical lining inside the railroad tracks at CTA Yellow Line Skokie Swift Dempster Street Station.

---

Size: 5184px × 3456px
Location: Skokie, Illinois, USA
Photo credit: © Chocoholic / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: acoustic, acoustical, area, authority, chicago, control, controls, cta, deadens, dempster-skokie, foam, gray, grey, illinois, line, lining, manipulates, metamaterial, noise, public, rail, rails, rapid, reduction, repetitious, repetitive, skokie, sonic, sound, station, stiff, swift, terminal, terminus, tracks, train, transit, transport, transportation, triangular, waves, yellow