How loud is LOUD?

[mrray13 10+ year member]

by osha standards..85db is loud. loud enough to mandate earplugs inthe work place...

130db, ear damage occurs instantly, IIRC.....

so, what is loud?

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee //content.invisioncic.com/y282845/emoticons/peace.gif.2db28b618ed8d1964ebbe2f5021d2c39.gif

 

[JimJ 5,000+ posts]

85dBA...//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Jesse98 10+ year member]

Well....that's as accurate as anybody can get //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Only way to find out is to get 'er on a mic.

lol yea i knew that was the answer but i was hoping for a guess based on a similar setup some one may have seen.

 

[OnYrMrk 10+ year member]

//content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif
3db increase is technically twice the acoustical power (twice as "loud"). However, human's have very inaccurate/insensitive hearing, and perceive "twice as loud" to occur at around a 10db increase.

So;

3db increase = twice the acoustical power (technical doubling of sound)

10db increase = perceived as twice as loud by human's

It has nothing to do with needing to double the actual decibels (120 * 2) to be twice as loud.

doubling the power...but not doubling the sound.

Technically 3 db is considered a huge increase, but by no means is it doubling the sound.

but then again, I am looking at it through math, not technical mumbo jumbo.

I do know what over 130db can do to a person's ear drums, and have witnessed an MI caused by 140 db. MI is Myocardial Infarction to those not medically inclined. (Heart Attack)

Audible perception aside, since not everyone is the same, this is truly a moot point between two people of varied backgrounds. You sir, are a technical person, I on the other hand a medical person, so through my medical background, I would have to say that anything over 100db is detrimental to your over all health.

What did this post accomplish, nothing except that I typed it in under 2 minutes.

 

[klassic 10+ year member]

Bottom line

>125 not quiet but not loud to many

>130 loud

>140 very loud

>150 loud as hell!

 

[squeak9798 5,000+ posts]

doubling the power...but not doubling the sound.
Technically 3 db is considered a huge increase, but by no means is it doubling the sound.

but then again, I am looking at it through math, not technical mumbo jumbo.

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Mathmatically 3db increase is still a doubling of sound intensity;

10log(2/1) = 3.0103db

If something is 3db louder, it would have double the sound intensity.

But we human's don't hear too well in the grand scope of things; so we generally consider a 10db increase to be perceived as twice as loud.

 

[nauc 10+ year member]

Bottom line>125 not quiet but not loud to many

>130 loud

>140 very loud

>150 loud as hell!

x2

i heard a car last week, does 152, id have to say its was loud as hell

 

[mrray13 10+ year member]

85dBA...//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

picky,picky,picky....

so, what's the difference? the difference between db, dba and dbc? (i believe it's c, and i think i know the difference, but i want to "c" how close i am..lol)

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[JimJ 5,000+ posts]

It's a weighting scale, simply to equalize our ears' differing sensitivity to varying frequencies.

I know I've posted a link to a physics page explaining the scales, but since I'm lazy today I'll wait for James to do it //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[squeak9798 5,000+ posts]

Yup Yup.

Since 150db @ 25hz is different than 150db @ 10khz.

 

[Raven 10+ year member]

Didn't I say that in my post? Phon = dBA.

And for everyone arguing against a 12 guage being twice as loud as a .22, just take a 357 magnum, fire off a 38 round, then fire off a 357 round. It's a greater difference than that.

 

[mrray13 10+ year member]

It's a weighting scale, simply to equalize our ears' differing sensitivity to varying frequencies.
I know I've posted a link to a physics page explaining the scales, but since I'm lazy today I'll wait for James to do it //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

"A" scale is for "noise", 500hz to 10khz, which is the area of greatest sensitivity for human ears. which is why OSHA uses the "A" scale. most noise at work falls well within this range.

"C" scale is for the full frequency range, typically from 32hz thru 10khz. this is the scale used in musical applications....

so, from my reading last night, i get this....150db is 150db regardless of frequency, BUT due to the human ear's sensitivity,150db anywhere in the A scale can cause more damage(both would cause instant hearing loss, but the higher frequency would be percieved to cause more as that's where our hearing is). and that's the only reason that 150db @25hz would be different then 150db @500hz...other then percieved sound.

btw, most hearing loss, in manufactoring enviroments anyway, starts in the 4khz range..i'll get more info on this as my annual hearing test at work should be due...

how close is that?

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[mrray13 10+ year member]

Didn't I say that in my post? Phon = dBA.
And for everyone arguing against a 12 guage being twice as loud as a .22, just take a 357 magnum, fire off a 38 round, then fire off a 357 round. It's a greater difference than that.

end of arguement coming up...

Table 2. SHOTGUN NOISE DATA (DECIBEL AVERAGES)

.410 Bore 28" barrel 150dB

26" barrel 150.25dB

18 " barrel 156.30dB

20 Gauge 28" barrel 152.50dB

22" barrel 154.75dB

12 Gauge 28" barrel 151.50dB

26" barrel 156.10dB

18 " barrel 161.50dB

CENTERFIRE RIFLE DATA

.223, 55GR. Commercial load 18 " barrel 155.5dB

.243 in 22" barrel 155.9dB

.30-30 in 20" barrel 156.0dB

7mm Magnum in 20" barrel 157.5dB

.308 in 24" barrel 156.2dB

.30-06 in 24" barrel 158.5dB

.30-06 in 18 " barrel 163.2dB

.375 18" barrel with muzzle brake 170 dB

CENTERFIRE PISTOL DATA

.25 ACP 155.0 dB

.32 LONG 152.4 dB

.32 ACP 153.5 dB

.380 157.7 dB

9mm 159.8 dB

.38 S&W 153.5 dB

.38 Spl 156.3 dB

.357 Magnum 164.3 dB

.41 Magnum 163.2 dB

.44 Spl 155.9 dB

.45 ACP 157.0 dB

.45 COLT 154.7 dB

Recall that sounds over 85-90 dB can lead to permanent hearing damage without hearing protection. As can be

seen from Table 2, even firing a .22LR (134 dB) has the potential of causing permanent, irreversible, inner ear

damage.

for the rest of the article...

read this

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[Jesse98 10+ year member]

can i borrow some of you guys that have so much time on your hands, i have a yard that needs mowing.

j/k //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

i love the long drawn out scientific answers that no one really understands //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Spkrman]

can i borrow some of you guys that have so much time on your hands, i have a yard that needs mowing.

j/k //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

i love the long drawn out scientific answers that no one really understands //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

hell yea...

someone cut mah grass