A list of daily noise that we all have contact with -
0 decibels is the reference noise (the sound of soundlessness The loudest possible sound is rated at 194 dB. The sounds in red can be considered hearing hazards.
Sound Decibel Level
softest audible sound 0 dB normal breathing 10 dB rustling leaves 20 dB whispering 25 dB clothes dryer 60 dB normal conversation 60 dB dishwasher 65 dB car 70 dB
busy traffic 75 dB
alarm clock 80 dB noisy restaurant 80 dB average factory 85 dB screaming child 90 dB subway train 100 dB diesel truck 100 dB jackhammer 100 dB helicopter 105 dB power mower 105 dB shouting in ear 110 dB live rock music 90-130 dB football stadium 117 dB band concert 120 dB thunder 120 dB car horn 120 dB jackhammer 130 dB air raid siren 130 dB noisy squeeze toys 135 dB PAIN STARTS 140 dB gunshot 140 dB jet engine 140 dB rocket launching 180 dB loudest sound 194 dB
quote:Originally posted by Magus2727Focus: here are some links for people to read up on if they dont know what they are talking about...220dB??right......
A list of daily noise that we all have contact with -
0 decibels is the reference noise (the sound of soundlessness The loudest possible sound is rated at 194 dB. The sounds in red can be considered hearing hazards.
Sound Decibel Level
softest audible sound 0 dB normal breathing 10 dB rustling leaves 20 dB whispering 25 dB clothes dryer 60 dB normal conversation 60 dB dishwasher 65 dB car 70 dB
busy traffic 75 dB
alarm clock 80 dB noisy restaurant 80 dB average factory 85 dB screaming child 90 dB subway train 100 dB diesel truck 100 dB jackhammer 100 dB helicopter 105 dB power mower 105 dB shouting in ear 110 dB live rock music 90-130 dB football stadium 117 dB band concert 120 dB thunder 120 dB car horn 120 dB jackhammer 130 dB air raid siren 130 dB noisy squeeze toys 135 dB PAIN STARTS 140 dB gunshot 140 dB jet engine 140 dB rocket launching 180 dB loudest sound 194 dB
Good list. I recall seeing a post earlier where someone said a gunshot was 170 db. If that were th case, your eardrums would tear any time someone within about 50 ft shot a gun
quote:Originally posted by Magus2727Focus: here are some links for people to read up on if they dont know what they are talking about...220dB??right......
A list of daily noise that we all have contact with -
0 decibels is the reference noise (the sound of soundlessness The loudest possible sound is rated at 194 dB. The sounds in red can be considered hearing hazards.
Sound Decibel Level
softest audible sound 0 dB normal breathing 10 dB rustling leaves 20 dB whispering 25 dB clothes dryer 60 dB normal conversation 60 dB dishwasher 65 dB car 70 dB
busy traffic 75 dB
alarm clock 80 dB noisy restaurant 80 dB average factory 85 dB screaming child 90 dB subway train 100 dB diesel truck 100 dB jackhammer 100 dB helicopter 105 dB power mower 105 dB shouting in ear 110 dB live rock music 90-130 dB football stadium 117 dB band concert 120 dB thunder 120 dB car horn 120 dB jackhammer 130 dB air raid siren 130 dB noisy squeeze toys 135 dB PAIN STARTS 140 dB gunshot 140 dB jet engine 140 dB rocket launching 180 dB loudest sound 194 dB
Sorry, but, I call bull**** since when did a squeeze toy become louder than a concert or air raid siren or a damn jack hammer? You can hear a concert damned blocks away (If open arena). You can't hear a squeeze toy in the other room... w/e though. Hey don't pick on the 220 thing aite? I'm clinically insane.
-------------------- Okay so look...I got fired, I need money...so...send it. Posts: 1448 | From: Florence | Registered: Apr 2003
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posted
194 db in air. And there is 3 weightings for measuring spl. Basically, low, mid, and high. Also, measurements at certain distances will measure differently. So, there really needs to be a set standard with which to measure different sounds at. Things such as one watt at one meter for speakers, etc. Hey - I can burp at 138.7 - with the mic at my mouth, but in the passenger seat and the mic on the dash- it's only 119. Ya get the point!
posted
Thanks for posting this man,. My buddy's not to bright when it comes to this stuff. He thinks people with bad competition subs can hit 220 with just one. I just keep my mouth shut.
Why is 194 the loudest possible though? I don't see why there couldn't be louder? Also on a side note, what's the loudest score ever in SPL compitetion?
Justin
-------------------- Hooked on sonics worked for me! Posts: 766 | From: Tucked65's Trunk | Registered: Mar 2003
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posted
Loudist SPL in comp I think was 179.something.
194 is the most I think in air because after a certain point the air can’t get compresses any more. there is a max that is possible with out using a entire Nuclear Power plant to push a piece of air to 195 dB. And why would they. Any thing over 180 would kill your hearing.
Other notes -
OK take the squeeze toy and put it 2 inches from your ear. Now go to a concert that goes from (90-130). The reason why the concert would be thought of as louder if because take the squeeze toy and be squeezing it for the 2+ hours you will be at the concert! now what will hurt more. It is Physically impossible to hit any thing over 200dB each dB is 10 times louder then the previous dB (think it is 10 - its in the range of 5-10 times) some one did not read the links...
every thing is relative .. I think some national studies would be a lot better then some guy talking about 220 dB. If it could be done It would be.
use conmen sense when looking at the dB. Since all of these are common day stuff - Jack hammer 4 feet away. When are you going to be closer then that to a jack hammer unless you’re using one. concert I doubt that you have your head right next to all 90 speakers the whole time, your in a crowd of 5,000+ people around you blocking the Sounds wave...Also Did you learn any thing in high school physics. Low sounds travel further the High.
ARG, I think you should get a Clue - JeremyD - 927 posts = good list team basket kase -636 posts = 194 dB in air Max SPL
do a little research on something before you start talking about something you Obviously don’t know any thing about
If you think what you say will make you sound stupid, then its better to keep silent, than to open your mouth and remove all doubt…
Sorry Admin you can edit what you want I Just needed to vent..
-------------------- Chris Miller Posts: 505 | From: Canton, MI | Registered: Mar 2003
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posted
You can not achieve a sound at sealevel any higher than 194.6db. There is a mathematical formula with a proof the explains it, but the concept can also be exlpained on the intuitive level as well.
if you look at a sound wave and how it travels throug the molecules of air, the leading edge of the sound wave is compressed and the trailing edge is "de-compressed" (lol) The more compression there is on the front of hte wave and the more decompression behind the wave, the louder the sound is. When you near 194.6, the area in front of the wave is highly compressed, but can still be compressed further. However, behind the wave is a different story all together. You are limited in the amount of decompression to the point of a vaccum. If you were to achieve a vaccum behind the pressure front of the wave, you'd achieve 194.6. Nature abhors a vaccum, and as such one cannot exist in a free atmosphere.
If you want to achieve higher than 194.6, you need to change atmoshperes. For instance the Navy has already achieved 220+ db with some of it's sonar systems.
Posts: 4518 | From: Land Lord of Iggy's Head Apart Complex Tower #2 | Registered: Jan 2000
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You can get higher than 194 dB, all you need to do is increase the compression part of the cycle more. It's not a clean tone, but who cares, it's louder.
C
-------------------- *hmm need to think of a new sig* Posts: 2999 | From: England | Registered: Oct 2000
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quote:Originally posted by Magus2727Focus: Loudist SPL in comp I think was 179.something.
194 is the most I think in air because after a certain point the air can’t get compresses any more. there is a max that is possible with out using a entire Nuclear Power plant to push a piece of air to 195 dB. And why would they. Any thing over 180 would kill your hearing.
Other notes -
OK take the squeeze toy and put it 2 inches from your ear. Now go to a concert that goes from (90-130). The reason why the concert would be thought of as louder if because take the squeeze toy and be squeezing it for the 2+ hours you will be at the concert! now what will hurt more. It is Physically impossible to hit any thing over 200dB each dB is 10 times louder then the previous dB (think it is 10 - its in the range of 5-10 times) some one did not read the links...
every thing is relative .. I think some national studies would be a lot better then some guy talking about 220 dB. If it could be done It would be.
use conmen sense when looking at the dB. Since all of these are common day stuff - Jack hammer 4 feet away. When are you going to be closer then that to a jack hammer unless you’re using one. concert I doubt that you have your head right next to all 90 speakers the whole time, your in a crowd of 5,000+ people around you blocking the Sounds wave...Also Did you learn any thing in high school physics. Low sounds travel further the High.
ARG, I think you should get a Clue - JeremyD - 927 posts = good list team basket kase -636 posts = 194 dB in air Max SPL
do a little research on something before you start talking about something you Obviously don’t know any thing about
If you think what you say will make you sound stupid, then its better to keep silent, than to open your mouth and remove all doubt…
Sorry Admin you can edit what you want I Just needed to vent..
1. I haven't taken physics yet 2. If you are talking about different distances then none of these are right at all. It isn't fair to say a squeeze toy is 120 at your ear and a rocket launching is 30 4 miles away. It doesn't work that way.
-------------------- Okay so look...I got fired, I need money...so...send it. Posts: 1448 | From: Florence | Registered: Apr 2003
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quote:Originally posted by Magus2727Focus: It is Physically impossible to hit any thing over 200dB each dB is 10 times louder then the previous dB (think it is 10 - its in the range of 5-10 times)
Actually, you can't put decibels in a linear scale like that. And if you take a moment to think about what you just said, you'd realize how false it was. By "louder" if have to assume you're talking about sound intensity relative to human hearing. If a one decibel increase is ten times "louder", according to that chart, a car engine (70db) would be be 100,000 times louder than a dishwasher (65db) because of the five power increase in sound. This is obviously not true.
Posts: 136 | From: Oregon, USA | Registered: Mar 2003
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quote:Originally posted by Magus2727Focus: It is Physically impossible to hit any thing over 200dB each dB is 10 times louder then the previous dB (think it is 10 - its in the range of 5-10 times)
Actually, you can't put decibels in a linear scale like that. And if you take a moment to think about what you just said, you'd realize how false it was. By "louder" if have to assume you're talking about sound intensity relative to human hearing. If a one decibel increase is ten times "louder", according to that chart, a car engine (70db) would be be 100,000 times louder than a dishwasher (65db) because of the five power increase in sound. This is obviously not true.
magus...somebody caught an error (addressed below)
this is a simple concept like you said, but seems you don't have a perfect grasp on it yet either
you seem to be a bit on the harsh side here. Settle down a bit man...what you think is common sense isn't to others. Did you know everything about everything when you got into this? How long did it take you to learn what you know now? how much of that can be attributed to people you know personally who have helped show you how to do stuff? how much of that was learned on the internet? etc...etc...etc...
not everyone learns at the same rate, not everyone has read the same stuff you have, not everyone has had the same amount of time in this hobby to learn this stuff. simmer down. besides...i'm sure a few of the people here could pick apart some of your posts if you want to get down to the nitty-gritty. for starters i'll just add that if you are trying to be so specific and perfect you should have stated in your post what weighting scale was used for those measurements. was it A-weighted, B-weighted, or C-weighted? I know for almost a fact (didn't check sources) it wasn't unweighted...since the #'s in that list were prob taken in accordance with how OSHA meters stuff. it's still a good list tho, the fact that frequency plays a MAJOR role in how loud something is perceived should also have been mentioned in your post (as someone noted later)
many stuff way below 180dB would kill your hearing...
and a MAJOR error...
It is Physically impossible to hit any thing over 200dB each dB is 10 times louder then the previous dB (think it is 10 - its in the range of 5-10 times) some one did not read the links...
each dB is NOT 10 times louder...or even 5 times louder. There are equations out there that you can use to see how much of an increase a dB would give you in regards to power and whatnot. 1dB is the minimum change in perceived loudness that humans can detect (always will be slight variations, just like human hearing freq response). hint: 3dB is a doubling of energy, not a doubling of loudness. humans generally perceive an increase of ~10dB to be twice as loud. But as RIP said...this is not a linear scale, it is exponential.
sooo.... do a little research on something before you start talking about something you Obviously don’t know any thing about
If you think what you say will make you sound stupid, then its better to keep silent, than to open your mouth and remove all doubt…
your exact words directed to someone who didn't know as much as you...when in fact there is one blatant major mistake and a couple minor errors in your posts. Reread those links you posted...i didn't read them but maybe they contain wrong info lol i can give you some good ones if you want as i did a lil research on it a few years ago.
not tryin to sound harsh or condescending, just sayin if you're going to act like your smarter, make sure you're smarter
-------------------- "Those who give up liberty for the sake of security deserve neither liberty nor security" - Benjamin Franklin
DiRtY SoUtH DEAF SqUaD
Elemental Designs
To cheat is to admit defeat
--------------------------------- Loud...it's when you can see the ground move, it's when you have to force yourself to breath, it's when the rest of the world ceases to exist. Posts: 4136 | From: Lafayette, LA | Registered: Sep 1999
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posted
Some of y'all need to just calm down. Name calling will not be tolrerated. If the "stupid" comments, and telling others to "get a clue" continue, consider this closed.
I really suggest a few of you read a little more before you post. The knowledge of some of the senior members here is pretty strong, andf coming in here spouting off with some new found knowledge and name calling is a quick way to get the boot.
posted
Human hearing is much more sensitive to higher frequencies and alot of the comparisons are apples to oranges there is simply no good way to compare certain noises to others.
I would like to see how loud a F 15 jet would be inside a closed room
-------------------- Team Bass Coat
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In loving memory of my sister Kerry Ann Johnson 1970 - 2008
quote:Originally posted by alaska: each dB is NOT 10 times louder...or even 5 times louder. There are equations out there that you can use to see how much of an increase a dB would give you in regards to power and whatnot. 1dB is the minimum change in perceived loudness that humans can detect (always will be slight variations, just like human hearing freq response). hint: 3dB is a doubling of energy, not a doubling of loudness. humans generally perceive an increase of ~10dB to be twice as loud. But as RIP said...this is not a linear scale, it is exponential.
Each increase of 1 db is not 10 times louder, but it does represent a 10 fold increase in the intensity(or a tenfold decrease in area), as decibals area logarithmic function.
posted
I thought I read somehwere, that an increase of 20dB is double the amplitude. Don't know if it's true or not, but considering the exponential growth factor, it sounded legit at the time.
And for the frequency perception of loudness/ frying your eardrums at a higher frequency with a lower dB rating, I think I know why. Obviously, the higher frequecy is changing pressures faster, placeing more stress on the eardrums. So I'm guessing this is why people are more sensitive to higher pitched noises
Not to change the subject, but why is it they say that the lowest tone people can here is 20Hz? I'm a tuba player, and on my horn (20" bell, can't you tell I'm a basshead?) I can play some 'pedal tones', that equate to around 17Hz if I'm not mistaken. Also, i'm blowing my --- off to hit these, so does that mean with the energy being used, I'm really hitting like 155? Maybe I can buy a CRX and just toot my brains out.
-------------------- Hooked on sonics worked for me! Posts: 766 | From: Tucked65's Trunk | Registered: Mar 2003
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quote:Originally posted by Thedrumming2ba: And for the frequency perception of loudness/ frying your eardrums at a higher frequency with a lower dB rating, I think I know why. Obviously, the higher frequecy is changing pressures faster, placeing more stress on the eardrums. So I'm guessing this is why people are more sensitive to higher pitched noises
No thats not it. It has to do with th threshhold of hearing. Since decibels are a measure of "relative intensity", it is frequency dependandant. As frequency changes, the threshold of hearing changes and thus the relative intensity of the sound changes.
quote:Originally posted by alaska: each dB is NOT 10 times louder...or even 5 times louder. There are equations out there that you can use to see how much of an increase a dB would give you in regards to power and whatnot. 1dB is the minimum change in perceived loudness that humans can detect (always will be slight variations, just like human hearing freq response). hint: 3dB is a doubling of energy, not a doubling of loudness. humans generally perceive an increase of ~10dB to be twice as loud. But as RIP said...this is not a linear scale, it is exponential.
Each increase of 1 db is not 10 times louder, but it does represent a 10 fold increase in the intensity(or a tenfold decrease in area), as decibals area logarithmic function.
aye
10^(dB/10) = change in energy/power/etc
for instance...if you had one system doing 140dB and another doing 170dB you can use that equation to see how much louder the 170dB is. first you subtract 140 from 170 and get a 30dB difference.
10^(30/10) = 10^(3) = 1000 times more energy
or, if you wanted to see how much quieter the 140dB was...
10^(-30/10) = 10^(-3) = .001 which is same as 1000 times less.
now, unlike a textbook i'll give a less "rounded" example.
152dB vs 156dB
10^(4/10) = 10^(.4) = 2.5 times more
now....if you already know how much more it is, it's easy to convert to dB
10*log(X) = dB
so...from the first example:
10*log(1000) = 30dB
or from the last example:
10*log(2.5) = 4dB (rounded up from 3.98dB)
hope that makes sense, another one of my posts right after i get up and out the shower lol
maybe that'll help clear things up since now people can actually see where these numbers are coming from (and to help show where JeremyD was getting his 10X increase in intensity *which is not the same as loudness*.
-------------------- "Those who give up liberty for the sake of security deserve neither liberty nor security" - Benjamin Franklin
DiRtY SoUtH DEAF SqUaD
Elemental Designs
To cheat is to admit defeat
--------------------------------- Loud...it's when you can see the ground move, it's when you have to force yourself to breath, it's when the rest of the world ceases to exist. Posts: 4136 | From: Lafayette, LA | Registered: Sep 1999
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