At its core, sound is energy made by vibrations. When something vibrates—be it a speaker, a car or truck engine, or your neighbor’s vocal cords—it results in waves that travel in the air. Check with concerns, share strategies, and get notified of latest Discussion board posts by signing up for https://fireresistance49117.blogsvirals.com/31528951/not-known-factual-statements-about-noise-pollution