Editing Waveguide (section)

== Acoustic waveguides ==
{{Main|Waveguide (acoustics)}}

An ''acoustic waveguide'' is a physical structure for guiding sound waves. Sound in an acoustic waveguide behaves like electromagnetic waves on a [[transmission line]]. Waves on a string, like the ones in a [[tin can telephone]], are a simple example of an acoustic waveguide. Another example are pressure waves in the pipes of an [[Pipe organ|organ]]. The term ''acoustic waveguide'' is also used to describe elastic waves guided in micro-scale devices, like those employed in piezoelectric delay lines and in [[stimulated Brillouin scattering]].