The December JASA Express Letters cover features depictions of non-reciprocal Willis monatomic lattices. The cover images were created by the author of “Brillouin-zone definition in non-reciprocal Willis monatomic lattices,” Hasan B. Al Ba’ba’a. This article is also part of the Joint Special Issue on Wave Phenomena in Periodic, Near-Periodic, and Locally Resonant Systems.

This month’s issue also included a couple of Editor’s Pick you don’t want to miss:

• “Effects of sound segregation cues on multi-sound intensity discrimination,” by Kenta Watanabe, Ramesh Srinivasan, and Virginia M. Richards
• “Exploring effects of social information on talker-independent accent adaptation,” by Drew J. McLaughlin and Kristin J. Van Engen
• “Selective tuning of nasal coarticulation and hyperarticulation across slow-clear, casual, and fast-clear speech styles,” by Michelle Cohn and Georgia Zellou

Browse the rest of the issue at https://pubs.aip.org/asa/jel/issue/3/12.