"The whole strata community owes a huge debt of gratitude to you and the OCN executive. Much appreciated."
2.3 What is noise?
Sound is what we hear. Noise is unwanted sound. Noise is an important form of pollution caused by unwanted sound. The difference between sound and noise depends upon the listener and the circumstances. Rock music can be pleasurable sound to one person and an annoying noise to another. In either case, it can be hazardous to a person's hearing if the sound is loud and if he or she is exposed long and often enough.