What are good Sones ratings?

Sound levels are rated in sones where the lower the rating number, the quieter the fan. Typical economy fans are rated at about 4.0 sones or more while any fan rated 1.0 sones or less is very quiet (1.0 sones is roughly equivalent to a modern refrigerator).Click to see full answer. Similarly one may ask, what are Sones ratings?A sone is a linear measurement of loudness based on how an average listener senses sound. It is different than decibels and volume, which are most commonly used to measure the intensity of audio. For instance, a bathroom fan with a sone rating of 0.3 is considered to be very quiet.Similarly, how many Sones is a quiet bathroom fan? One sone is equivalent to the sound of a quiet refrigerator. A quiet bathroom fan will be rated at about 1.5 sones or less. Furthermore, what does 1 Sones sound like? Sones are not decibels or volume, but rather how sound is sensed. Sones are a linear measurement, like inches. Doubling the sone value is equivalent to doubling the loudness (i.e. one to two, two to four is doubling the sound level twice). One sone is equivalent to the sound of a quiet refrigerator in a quiet kitchen.What are Sones and CFM?CFM, which is the measurement unit for exhausting air flow, stands for cubic feet per minute. If the number of sones is doubled, the loudness of a noise is also doubled (i.e., if a unit produces 2 sones of noise and another unit produces 4 sones, the second unit is twice as noisy as the first).