sentences:  straddling a corner also helps to ensure it protrudes more into the room where there is more air velocity, improving its velocity-based absorption and extending its bandwidth while inducing some ripple in its absorption spectrum.Resonant bass trap absorbers need to be at a pressure maximum and tend to be thinner, so they are more conveniently and effectively positioned flat against a wall in a corner where the pressure is maximum, rather than straddling a corner where there is more velocity.Standard practice is to investigate the applicability of porous bass trap absorbers before investigating resonant or hybridized bass trap absorbers.