I'm thinking about installing a different (and louder) horn--need to get the attention of some of these SA drivers. I did a search and couldn't find any threads on horn mods. Any ideas?
gandolphxx said:Here are some suggestions:
Truck Horns - 152 DB
The Best Darn Parts - by all means check out the Dukes of Hazard horn set.
Skidd said:I've got a set of air horns hooked up to my Silverado... loudest things on earth. ?Scares the sh*t outta people when they try and move over on you. ?To keep legal I have a two way switch on the dash that flips back to the normal car horn. ?
That train horn is a MUST for me! I wonder if I will mount it out for all to see or put it under the hood. Nah....keeping it under the hood. Now to find the $600 to get the horn and the compressor. Any suggestions on mounting locations. I was thinking opposite side from the under hood fuse box or down low somewhere.gandolphxx said:Here are some suggestions:
Truck Horns - 152 DB
The Best Darn Parts - by all means check out the Dukes of Hazard horn set.
ShapeShifter said:Be aware that dB is a logarithmic scale. Each 3dB is double the volume.
Take the Griot's at 135 dB as a reference. Then a horn that is 138 dB (135 + 3) would be twice as loud, and one at 141 dB (138 + 3) would be twice as loud as the 138. The horn at 141 would be four times as loud as the one at 135. The Hella horn should be almost 4 times as loud as the Griot's.
The train horn at 150 dB is 15 dB louder than the 135. That makes it 32 times louder than the 135 dB horn. (15 divided by 3 is 5, 2 raised to the fifth power is 32)
Also, there are different loudness scales, one of them is dBa, I don't remember the others) and numbers cannot be directly compared between them. (I'll let an audio expert come up with the conversion formulas.)
Finally, the sound level can be measured at different distances. The closer the measurment is made to the sound source, the louder the reading.
The only way to really compare sound levels is if they are measured on the same scale, and at the same distance. Unfortunately, must ads do not indicate the scale or distance, so direct comparisons are difficult.
It's just like with audio specs: you can compare the watt rating of two amplifiers, but unless you also know the distortion level and speaker impeadance, you really can't compare the numbers.
-- SS
This is a common misconception, going as far as several home and car audio magazines recognizing it. The truth is that every 10 dB is double the volume, not every 3 dB. But the general idea is there: 50 dB is not simply twice as loud as 25 dB.ShapeShifter said:Be aware that dB is a logarithmic scale. Each 3dB is double the volume.
I may be mistaken, but I stand by my earlier comments. Just to be sure, I looked up the definition again, and found this:Boar-Ral said:This is a common misconception, going as far as several home and car audio magazines recognizing it. ?The truth is that every 10 dB is double the volume, not every 3 dB. ?But the general idea is there: 50 dB is not simply twice as loud as 25 dB.
Just my two cents.
Now take the case where P2 is twice P1. The ratio P2/P1 will be 2. The log base 10 of 2 is 0.30103, and ten times that is 3.0103. (As a generalization, that's close enough to 3 for most people.) If P2 is four times P1, then 10 times the log of 4 is 6.0206. And so on.dB
Pronounced decibel or just dB. Gives a logarithmic relation between two powers. The scale follows the relation:
db = 10 * log10(P2 / P1)
where
P1 is the reference or input power
P2 is the output power
0 dB means that the powers of P1 and P2 are equal. 10 dB means that the power P2 is 10 times higher than P1. 20 dB means that the power P2 is 100 times higher than P1 and in the same way -10 dB means that P2 is a tenth of the power of P1. Decibels is really a dimensionless scale, but it allways means the effective power ratio measured along a logarithmic scale.
Indeed. The problem with any formula such as this is that there are many variables, as you can see. (I do not mean ambient sound or other environmental variables. I mean concrete variables including voltage, etc.) Using the logarithmic forumula for dB, every 3 dB results in a doubling of the signal level, but to acknowledge a perceived doubling in volume requires 10 dB. This is because what we hear is not just the signal level. There are many variables between it and what we hear.ShapeShifter said:Now, all of that being said, there are some strange conventions with audio, and the standard engineering rules may not apply. If that is the case, I stand corrected. If you have a reference that indicates otherwise, please let me know. I'm always ready to learn something new.
OK, I get it. With a 3 dB increase, the power level (and presumably the sound pressure level) is indeed doubled. However, what I missed is that the human hearing response is apparently not linear!Boar-Ral said:Indeed. ?The problem with any formula such as this is that there are many variables, as you can see. ?(I do not mean ambient sound or other environmental variables. ?I mean concrete variables including voltage, etc.) ?Using the logarithmic forumula for dB, every 3 dB results in a doubling of the signal level, but to acknowledge a perceived doubling in volume requires 10 dB. ?This is because what we hear is not just the signal level. ?There are many variables between it and what we hear.
In my case, I'd probably say something like "Holy S---! That hurts!"Besides, how often do you go, 'Wow! ?That horn sounds like 150 dB!' ?More likely, you'd be comparing it to a train or something anyway.