Interactions in an acoustic world

TL;DR

This paper explores the interactions within an acoustic medium, analyzing how wave packets induce inhomogeneities, behave as lenses or black holes, and extend previous work on the acoustic world.

Contribution

It advances the understanding of acoustic interactions by analyzing wave-induced inhomogeneities and their complex behaviors like lensing and black hole analogies.

Findings

Wave packets induce medium inhomogeneities.

Spherical wave packets act as acoustic lenses.

Under certain conditions, wave packets mimic black holes.

Abstract

The present paper aims to complete an earlier paper where the acoustic world was introduced. This is accomplished by analyzing the interactions which occur between the inhomogeneities of the acoustic medium, which are induced by the acoustic vibrations traveling in the medium. When a wave packet travels in a medium, the medium becomes inhomogeneous. The spherical wave packet behaves like an acoustic spherical lens for the acoustic plane waves. According to the principle of causality, there is an interaction between the wave and plane wave packet. In specific conditions the wave packet behaves as an acoustic black hole.