In physics and psychoacoustics, a is a unit of measurement for perceived loudness. It was introduced in 1936 by S.S. Stevens to measure how humans actually experience sound intensity, which differs from a purely physical measurement like decibels (dB). For context, a running refrigerator is about 1 sone, a quiet office is around 2 sones, and a normal conversation is roughly 4 or 5 sones. You might see this term on the packaging for household appliances like bathroom or kitchen fans to indicate how noisy they are. For example, search results for "Broan 162 White 70 CFM 4.0 Sone Ceiling Mounted Bath Fan with Heater" use the word in this context.
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(often stylized as Sone162) is a widely known online community and forum dedicated to high school students and teenagers in Vietnam. Community Focus In physics and psychoacoustics, a is a unit