<p>An augmentor liner (10) is provided that includes an annulus (22) disposed between a first wall (18) and a second wall (20), and a plurality of baffles (34). The first wall (18) is disposed radially inside of the second wall (20). The plurality of baffles (34) extend heightwise between the first wall (18) and the second wall (20), and are circumferentially spaced apart from one another by a distance (40). The distance (40) between adjacent baffles (34) is such that an acoustic wave (42) entering an annulus compartment will travel between the first wall (18) and second wall (20) in a direction having a radial component that is substantially greater than a circumferential component. The baffle spacing (40) may alternatively be described as being such that the circumferential component of the acoustic wave is substantially damped and therefore does not materially contribute to undesirable screech.</p>