The cover image is from Figures 8 through 11 of “Apparatus for three-dimensional emission pattern estimation of acoustic emitters,” by Alberto Yoshihiro Nakano, Artur Adolfo Falkovski, Mayconvorgel Ibrahim Ribeiro, and Felipe Walter Dafico Pfrimer. Editor in Chief Jim Lynch says about the feature article: The 3-D directional pattern of an acoustic emitter is a key piece of its characterization, but not so simple to obtain with simple equipment and processing. In the article by Nakano et al, a relatively simple single sensor device mounted on a circular swivel is described, which allows very precise measurements to be made. The measurement is slower than a 3-D spherical enclosure, but has a great advantage in simplicity and cost.
- From Architectural Acoustics, “Singing in different performance spaces: The effect of room acoustics on singers’ perception,” by Yvonne Gonzales Redman, Joshua D. Glasner, Dario D’Orazio, and Pasquale Bottalico
- From Education in Acoustics, “What is silence? Therefore, what is sound?,” by William A. Yost.
- From Psychological and Physiological Acoustics, “Effects of hearing loss, age, noise exposure, and listening skills on envelope regularity discrimination,” by Christian Füllgrabe, Lionel Fontan, Élodie Vidal, Hugo Massari, and Brian C. J. Moore.
- From Signal Processing in Acoustics, “Mid-frequency acoustic localization of breaking waves,” by Ryan Saenger, Luc Lenain, and William S. Hodgkiss.
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/154/4.