Yaris Sedan Deadening and Sound system upgrade

[derickveliz2]

It's hard to have a sense of scale with db (decibels) so I thought about what if I open the window at 80mph? almost 10 db more, but to my ears it was twice as much louder. It's interesting how these measurements work, we are used to grab a ruler and measure, but with decibels I guess it doesn't work the same way.

enjoy

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[talnlnky]

Originally Posted by derickveliz2

It's hard to have a sense of scale with db (decibels) so I thought about what if I open the window at 80mph? almost 10 db more, but to my ears it was twice as much louder. It's interesting how these measurements work, we are used to grab a ruler and measure, but with decibels I guess it doesn't work the same way.

enjoy

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the dB scale is exponential. either 0 or 1 dB is supposed to be the lowest volume of sound a human ear is supposed to be able to hear. Every increase of 3dB is technically a doubling in volume. HOWEVER, human ears suck as listening tools. Human ears usually perceive a 6 to 10dB increase as being a doubling in sound.

So, you saying that a 10dB increase felt like a doubling is within normal perception.

Also, once you start getting up past 120dB, the ears really can't tell what a doubling is... especially when you start getting in the 140+ range.

Another thing, there are many different decibel measurement tools out there. I know of only one that is accurate & consistent regardless of environmental conditions. Many are very liberal with their ratings (higher readings than they should be).