Actually, it depeneds on the frequency. Humans are least sensitive to the bass frequencies and high frequencies, so we're more apt to notice changes in the midrange. (2500-5000hz is the range we are most sensitive to, due to the resonance of our ear canal). See this page for more info: http://hyperphysics.phy-astr.gsu.edu/hbase/sound/eqloud.html
So what makes sense is that in the upper midrange, 2-3db might sound twice as loud, but for us to make the same distinction for the very high or very low frequencies, it may require a 6db difference or more.
“An engineer explained to us that hundreds of ear impressions were gathered in the name of research, and while each one obviously boasted its own unique shape and size, one single characteristic remained uniform across the board: the entrance into the ear canal is not a perfect circle, it's an oval.”
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Actually, I believe it's a 6 db increase that's equal to a 100% increase in percieved loudness.
Actually, it depeneds on the frequency. Humans are least sensitive to the bass frequencies and high frequencies, so we're more apt to notice changes in the midrange. (2500-5000hz is the range we are most sensitive to, due to the resonance of our ear canal). See this page for more info: http://hyperphysics.phy-astr.gsu.edu/hbase/sound/eqloud.html
So what makes sense is that in the upper midrange, 2-3db might sound twice as loud, but for us to make the same distinction for the very high or very low frequencies, it may require a 6db difference or more.