One of those occurs with loud noise exposure. While the ears are excellent at discerning the differences between sounds, it is not without its shortcomings. The ears take the external stimulus of the changes in pressure and convey that into neurological impulses that are then interpreted by the brain. When a sound is created, it acts as the drop of water, and the subsequent sound created can be thought of as the ripples in the water. When something makes a noise, it can be thought of as a water drop hitting a still pond and emanating outwards in all directions. Sound at its most fundamental level is a series of pressure waves caused by the compression of air. Many people take the sense of sound for granted, but when you really sit down and think about it, an immense amount of complexity goes into sensing and perceiving sound. It states that the minimum increase of sound will produce a perceptible increase of sound that is proportional to the pre-existent stimulus.” - Drew Sutton, MD, Board-Certified Otolaryngologist This is known as the Weber-Fechner law which applies to all of our senses. Something that is perceived as louder, may actually be extremely loud. The point is that the human perception of the intensity of sound is not linear. Decibel originates from efforts to quantify telegraph and telephone circuits in the early 20th Century to express these very large ratios. “A decibel is a measure of 1/10 of a bel, using a logarithmic scale, meaning it is a way to express very large numbers in a convenient way.
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