Australian Wood Review Issue 120, September 2023 In this article I introduce sound pressure waves and relative sound levels in a typical workshop. There are numerous personal hearing protection options available, include earplugs, earmuffs, and active noise control (ANC). Beware the dangers of in-ear playback at damaging sound levels. I also cut through the jargon with definitions for ANC, class rating, decibel, decibel A filter, pressure wave, SLC80, SPL, etc. Read Article