![]() Sometimes it can be noise and sometimes it can be a pleasant sound. Then what about the sound produced by vocal cords or a violin? Well, it depends. It is an unwanted sound that lacks musical quality or is simply unpleasant. So, what is acoustic noise, and what is sound? Yes, noise is sound. No cars, no cell phones, no planes passing overhead, no TVs, no construction machines, no wind turbines, no roaring motorcycles! Just the whisper of the wind in the trees. Only church bells and muezzin calls to prayer broke the silence from time to time. Imagine, some two hundred years ago there was almost no noise. It is 62 dB noise in the office where I write this article and 61 dB in the “quiet” residential street where I live. Low nocturnal noise can disrupt your sleep and well-being. Noise pollution is not necessarily connected to loud noise. We cannot escape it and noise pollution has long ago become a public health issue. It is everywhere! It is part of our lives. ![]()
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