Acoustics equations with standing-wave data,
solid walls at *x* = 0, *x* = 1, as specified in setrun.py.

Example [book/chap7/standing] to accompany the book Finite Volume Methods for Hyperbolic Problems by R. J. LeVeque.

Converted to Clawpack 5.0 form in 2013.

Converted to Clawpack 5.4.0 form in 2017.