How many DBs is twice as loud?

[fecupe2001]

yep we all know that

[Watch the bass]

I learned 10 db louder/Volume 10 times power, like 1 w 90 dB, 10 w 100 dB, 100 watt 110 dB

[cqtama]

I´ve gained 1.5 db by x3 the power before, so those 3 dbs by doubling the power isn´t a rule at all

well its not just power, in order to gain 3 db i believe its double power along with double the output source (2nd of the same woofer) so for example if you have 1 15 on 2000 watts in order to gain 3 db you need to add another of the same 15 in the same type of box with the same power effectively doubling your output source adding 3 db to your total output.

[dog24fret]

If I may ask a question about this subject. I'll be going from 500 watts to 2000 watts. From 4 to 8 12" subs. I am not at all sure what the gain would be on that application.

[Stephen]

Simple question....

I read somewhere on here that every 10dbs is twice as loud acoustically..

and twice as loud with 3dbs to the ear? or something i know this is wrong....

But what is it?

http://www.animations.physics.unsw.edu.au/jw/dB.htm

[ALPINE408]

if you go from 147 dbs to 150 it sounds 2 times as loud as the 147 by ear.. 140 to a 150 sounds 10 times as loud to me by ear

but im not gonna argue the math

[Stereolab]

I think bass at ultra-high decibels is perceived differently, it's not heard so much as it's felt, and 150db certainly feels much more than twice as strong as 140db...

Edited November 4, 2011 by Merzbow

[woodzyspl]

with 4 12's we got a 149-150 from less then 3k then a 152.2 from 9k.

yet with 2 15s in slightly diffren't box the 3k did a 142 then 9k did 153.4

then with 1 15 3k and 9k was only 1db diff, don't remember scores tho..

yeh teammate loves building 100's of boxes 2 days before a comp and we try build a wall in under 2 days, still got a 152 lol our first wall

so i suppose every box diff lol

[Wicks]

If I may ask a question about this subject. I'll be going from 500 watts to 2000 watts. From 4 to 8 12" subs. I am not at all sure what the gain would be on that application.

Theoretically,

With doubling your power from 500W to 1000W, you get +3dB.

Doubling again to 2000W gives another +3dB.

Doubling your cone area, another +3dB.

Total = +9dB.

There are MANY other factors that play into this as well. Box type, box size, cabin gain, EQ settings, etc...

[dog24fret]

Thanks Wicks for the info. I'll be posting the box in a few.