FALL ISSUE

The first article in this issue of Acoustics Today (AT) is by Jamilla Balint, Marco Berzborn, Mélanie Nolan, and Michael Vorländer. The authors write about sound absorption in different types of rooms and discuss the issues that make measuring sound absorption under different conditions a very substantial challenge. They also discuss the quite interesting history of measurements of sound absorption, starting when investigators had a person sitting in a room listening to the sound.

In our second article, Ewa Jacewicz, Joshua M. Alexander, and Robert A. Fox consider the range of frequencies needed for human speech. Although we tend to think of human speech as requiring sounds up to perhaps 5 kHz, the authors focus on higher frequencies and demonstrate that they add great value to speech comprehension

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