The cover image is Figure 1, of “Microstructure-based modeling to characterize low pore density open-cell foams and its experimental validation,” by Swati Sachan and Sripriya Ramamoorthy. The top portion features the unit cell of a body-centered-cubic microlattice and the 3D periodic sample created by its spatial repetition, while the bottom shows samples of varying pores per inch.

Some other research was also highlighted on the January JASA cover:

• From Computational Acoustics, “Topology optimization of a waveguide acoustic black hole for enhanced wave focusing,” by Abbas Mousavi, Martin Berggren, Linus Hägg, and Eddie Wadbro
• From Physical Acoustics, “An acoustic investigation of the near-surface turbulence on Mars ,” by Baptiste Chide, Philippe Blanc-Benon, Tanguy Bertrand, Xavier Jacob, Jérémie Lasue, Ralph D. Lorenz, Franck Montmessin, Naomi Murdoch, Jorge Pla-Garcia, Fabian Seel, Susanne Schröder, Alexander E. Stott, Manuel de la Torre Juarez, and Roger C. Wiens
• From Signal Processing in Acoustics, “Improving onset picking in ultrasonic testing by using a spectral entropy criterion,” by Benjamin Bühling and Stefan Maack
• From Acoustic Standards and Practice, “Sound power determination by intensity—Are field indicators and criteria in ISO 9614 meaningful?,” by Volker Wittstock. Spyros Brezas, and Fabian Heisterkamp

All the articles from the cover are free to read for a month after the cover is released, so be sure to check them out! You can find the whole issue at https://pubs.aip.org/asa/jasa/issue/155/1.