[SOLVED] How loud is 86DBA?

A difference of 10 decibels should be perceived as sounding about twice as loud, since human hearing and doesn't follow a linear scale. A 6 decibel difference like that should sound about 50% louder, so it would be a pretty significant difference. Of course, the frequency of the sound and other characteristics can affect how loud something sounds as well. A particular hair dryer and lawn mower might have around the same decibel output, for example, but one may be perceived as sounding notably louder than the other.

It's also worth noting that you should avoid long-term exposure (like multiple hours every day) to sounds around 85 decibels and higher, and should avoid sounds above 100 decibels for more than a matter of minutes each day since those sound levels can potentially cause damage to hearing.
 
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