brianG 3 Report post Posted January 1, 1970 The minimum increase in volume which the human ear can perceive is 3 dB. For reference, a 3db increase is twice as loud and requires twice as much amplifier power to create this increase. For people, however, a 3db change is the minimum noticeable change. It takes a 10db increase for a speaker to "sound" twice as loud. And this 10db increase requires over 8 times more power to create. 2x power for 3db, 4x power for 6db, 8x power for 9db, 16x power for 12db... -------------------------------------------------------------------------------------------- Decibel (dB) 1 1 1 Aaron Clinton, Piorwvlowl and MJS_IraggiAlts reacted to this Share this post Link to post Share on other sites
AdrianD 6 Report post Posted January 1, 1970 Another great post Brian ! +1 for you Share this post Link to post Share on other sites
Aaron Clinton 18 Report post Posted January 1, 1970 Nice post for sure. Share this post Link to post Share on other sites
brianG 3 Report post Posted January 1, 1970 thanks guys Share this post Link to post Share on other sites
Toyota Thundra 0 Report post Posted January 1, 1970 Great post bro, its nice to have that here, so we all dont end up retyping it 1000 times. Share this post Link to post Share on other sites
AdrianD 6 Report post Posted January 1, 1970 I just remembered I have a whole page in a physics manual with a couple additions to this info Share this post Link to post Share on other sites
Aaron Clinton 18 Report post Posted January 1, 1970 Is it a bunch to type out? Share this post Link to post Share on other sites
AdrianD 6 Report post Posted January 1, 1970 Link to picture of some info : http://i25.tinypic.com/mtbci8.jpg There's lots more...I'll try to summarize it in a post, so it's easier for anyone who wants to read. Share this post Link to post Share on other sites
brianG 3 Report post Posted January 1, 1970 If you would like i can add more to it.Including any physics you'd like,and sound perception at differant frequecies including decibel differances between them Share this post Link to post Share on other sites
AdrianD 6 Report post Posted January 1, 1970 Add them if you can The more tech info, the better. Share this post Link to post Share on other sites
geolemon 0 Report post Posted January 1, 1970 One of the things I always find myself harping on (on other forums) is very much related to this thread: "It takes nearly a 5x increase in power to effect just a 2x increase in loudness." ..and actually worse, if you consider human perception rather than actual "sound pressure"! I feel like I say that 10 times a day, some days... lol I usually end up spitting that out when some kid wants to buy a big-ass sub, throw it in a prefab box and is shopping for a 5,000w amp or something ludicrous... :sick: Power isn't the way to get loud. And if you are wondering where I get 5x from - it is actually only a 4x requirement in the theoretical world (for 6dB - as stated in the first post)... but that doesn't factor in additional efficiency losses due to heat in the voice coil. The more power you send in, the more heat you get, the less efficient it is. 1 Aaron Clinton reacted to this Share this post Link to post Share on other sites
geolemon 0 Report post Posted January 1, 1970 Thought this might be useful here too: http://www.betteraudio.com/geolemon/Phasing/Phasing.htm Pardon the ugly formatting on that, I haven't updated it in years. And pardon me if this thread was more aimed to dB and SPL - my article here was aimed more at SQ, imaging, and how to control perceptual issues... some people don't realize some of the inherent flaws they have with their speaker locations/counts that often have to be undone (or at least controlled) before other issues can be tackled! On page 2 I have some response graphs that show the ugliness that can happen, and how hard it is to actually dial out. ;-) I love this stuff! :drinks: 1 Aaron Clinton reacted to this Share this post Link to post Share on other sites
Aaron Clinton 18 Report post Posted January 1, 1970 Thanks for the link geolemon. Glad you found CA-F. Share this post Link to post Share on other sites
brianG 3 Report post Posted January 1, 1970 mabye this will help explain............http://hyperphysics.phy-astr.gsu.edu/hbase...con.html#soucon ..............briang 1 Aaron Clinton reacted to this Share this post Link to post Share on other sites
Deephaven 12 Report post Posted December 9, 2010 The minimum increase in volume which the human ear can perceive is 3 dB. For reference, a 3db increase is twice as loud and requires twice as much amplifier power to create this increase. For people, however, a 3db change is the minimum noticeable change. It takes a 10db increase for a speaker to "sound" twice as loud. And this 10db increase requires over 8 times more power to create. 2x power for 3db, 4x power for 6db, 8x power for 9db, 16x power for 12db... -------------------------------------------------------------------------------------------- Decibel (dB) � a unit for measuring loudness of sound. It can be confusing, because it is used in two different ways; one comparative and the other used as a rating scale. First, it is the standard for measuring relative loudness or intensity of sounds. One decibel is approximately the smallest change in level ordinarily detectable by the human ear. Second, this usage is derived from the first. By referring this comparative unit to a �reference intensity level� of 10-16 watts per square centimeter, a scale of sound pressure levels is obtained, ranging from 1 (considered the lowest value that the human ear can detect) to and beyond 130 (considered the �threshold of pain�). -------------------------------------------------------------------------------------------- The important thing to know about decibels is this: if a sound increases by 10 decibels, it doubles in loudness as we perceive it. It sounds twice as loud to us. If a sound decreases by 10 decibels, it seems as if the sound has been reduced to half the volume. Perceived Change in Loudness by Decibel Level This chart shows the change in decibel sound level and how it is perceived by the human ear: +,- 1 dB Not perceptible +,- 3 dB Threshold of perception +,- 5 dB Clearly noticeable +,-10 dB Twice as loud or 1/2 as loud +,-20 dB Four times as loud or 1/4 as loud +,-30 dB Eight times as loud or 1/8 as loud ------bG Should replace the comma's with the word or Share this post Link to post Share on other sites
RoyGgs 0 Report post Posted September 14, 2012 (edited) Pardon the ugly formatting on that, I haven't updated it in years. And pardon me if this thread was more aimed to dB and SPL - my article here was aimed more at SQ, imaging, and how to control perceptual issues... some people don't realize some of the inherent flaws they have with their speaker locations/counts that often have to be undone (or at least controlled) before other issues can be tackled! Edited September 14, 2012 by Aaron Clinton spam link Share this post Link to post Share on other sites
Aaron Clinton 18 Report post Posted September 14, 2012 Thanks for joining and your post, but try it again with out the crap spam links. Share this post Link to post Share on other sites
brianG 3 Report post Posted September 30, 2012 Pardon the ugly formatting on that, I haven't updated it in years. And pardon me if this thread was more aimed to dB and SPL - my article here was aimed more at SQ, imaging, and how to control perceptual issues... some people don't realize some of the inherent flaws they have with their speaker locations/counts that often have to be undone (or at least controlled) before other issues can be tackled! YOUR POST? perhaps I am misunderstanding since I've been putting post up to help ppl since this site was first started..... welcome back me 1 Aaron Clinton reacted to this Share this post Link to post Share on other sites
Cablguy184 49 Report post Posted September 30, 2012 Pardon the ugly formatting on that, I haven't updated it in years. And pardon me if this thread was more aimed to dB and SPL - my article here was aimed more at SQ, imaging, and how to control perceptual issues... some people don't realize some of the inherent flaws they have with their speaker locations/counts that often have to be undone (or at least controlled) before other issues can be tackled! YOUR POST? perhaps I am misunderstanding since I've been putting post up to help ppl since this site was first started..... welcome back me Checking the Moderator stats ... I'm thinking that post was a spammer post. Welcome back to CA-F !!! Share this post Link to post Share on other sites
Aaron Clinton 18 Report post Posted December 17, 2012 Posted this on our CarAudioResources FB page. Share this post Link to post Share on other sites
