Natural (volcanoes, earthquakes, severe storms, bolides, etc.) and anthropogenic (chemical and nuclear explosions, wind turbines, dams, etc.) sources often generate low frequency acoustic (“infrasound”) signals. The recent detection of Martian infrasound via the InSight lander highlights the future of acoustic monitoring on other solar system bodies. Acoustic signals are observed on traditional microbarometer sensors and often on seismic sensors. Seismo-acoustic studies have shown that the fusion of seismic and acoustic observations can contribute to a better understanding of the seismic source as well as seismo-acoustic coupling of energy. This session is dedicated to highlighting the depth and breadth of studies of acoustic waves on the Earth and beyond. We invite submissions detailing recent science results and research advances in infrasound, seismoacoustics, and similar multi-phenomenological research. Presentations that explore observations and/or interpretations of acoustic phenomena, existing and emerging source and propagation models, advances in instrumentation and signal analysis techniques are welcome.