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Decibel scale definition3/29/2024 ![]() ![]() ![]() It is a system to tell how loud a sound feels to humans. Sones are not a physical measurement like decibels. The sones rating system is a way to measure or express perceived loudness. For every 3 decibel increase or decrease, you are adding or dropping 50% of the sound pressure levels your ears are exposed to. A simplified explanation is the 3 Decibel Rule. In some ways sone noise levels are easier to understand then decibel levels.ĭecibel levels use a logarithmic scale like the Richter earthquake scale. 2 sones are twice as loud as 1 sone and 4 sones are twice as loud as 2 sones. This means that doubling the number of sones doubles the noise level. If you know what a sone represents in the real world (See chart below.), you will be better able to know what the machine will sound like. ![]() But some electrical or mechanical equipment like range hoods and bathroom fans give sound value in sones. Most sound levels for equipment such as lawn mowers or compressors are given in decibels. Not very helpful? Please read on for real information that you can use when confronted with noise levels expressed in sones. Phon: a unit of the perceived loudness of sounds. Sone: a unit of subjective loudness, equal to 40 phons. Here is the Concise Oxford Dictionary definition. But when a measurement of noise level is expressed in sones, we might be a little confused. Most people have at least a rough idea of what a decibel is. ![]()
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