In article -
september.org, says...

Ralph Mowery wrote:

One Db is not vety much in sound level. To the ear it should be just
the minimum change that you can detect with average hearing. To get a
an idea about db, for 3 db of change double the distance. Say listen to
something at 2 feet away and then back up 2 more feet. At 8 feet it
would be 6 db of difference and to get to 10 db you have to back up to
20 feet.

Doubling original distance should be 6 dB change. 3 dB is a change of power
by 1/2 or double. SPL is a level specified by power. To double intensity,
like a voltage level, it takes 6 dB or four times the power. Similar to car
acceleration. It takes four times the HP to double acceleration.

Greg

Yes, I was off by half or double. Anyway for sound that the ear hears,
going only a few DB will not sound much different.