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Shop Talk
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| dlampe |
07-12-2010 07:22 PM |
What is a good DB sound level?
How loud is the typical cobra pipe? What about open pipes? Is 5 db's a noticeable difference?
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| greg schroeder |
07-12-2010 09:23 PM |
Every 3 db is double the volume or if 3 db less then half the volume.
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| Clois Harlan |
07-13-2010 04:12 AM |
I like about 15 db's :) :)
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| Hotfingrs |
07-13-2010 05:14 AM |
Quote:
Far spread is still the
theory of psycho-acoustic pioneer Stanley Smith Stevens, indicating that the doubling or halving the
sensation of loudness corresponds to a level difference of 10 dB
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That being said, my car at 30 feet at idle, was measured at 104 DB |
| Roscoe |
07-13-2010 05:51 AM |
What???????????????????????????
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| greg schroeder |
07-13-2010 06:19 AM |
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| Bobcat |
07-13-2010 06:30 AM |
I believe db levels are measured on a logarithmic scale ... which means things aren`t linear . Therefore as , as Greg , said , a small db change means a fairly significant in sound level .
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| CBattaglia |
07-13-2010 06:34 AM |
Quote:
Originally Posted by Roscoe
(Post 1064439)
What???????????????????????????
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Huh? You will have to say it in my right ear please. |
| rustyBob |
07-13-2010 07:52 AM |
when i was drag raceing they measured the db level at 50 feet.....
if you where over 96db at the start line at wide open throttle....
no raceing for you.....to loud and you went on the trailer....
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| Skuzzy |
07-13-2010 09:39 AM |
Yep, for example, going from 96db to 104dB makes that 104dB pressure level 12 times higher/louder than the 96dB pressure level.
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| jhv48 |
07-13-2010 10:49 AM |
I just kept raising the decibel level till my wife stopped trying to talk over them.
Just right now!
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| 951mat |
07-13-2010 11:50 AM |
You're getting old Dean. You don't want to choke your engine do you?
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| jdean |
07-13-2010 01:04 PM |
I cut off the standard mufflers and put on the Classic Chambered. Less restriction and less noise.....until you really hit it.
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| Silverback51 |
07-13-2010 01:35 PM |
When your ears bleed,:eek: go back to the prior setup.:D
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| Dwight |
07-13-2010 04:56 PM |
80 db and you need, by law, hearing protection.
I think a lot of states require a car to be 80 db or less.
In the gun world, I hear that a 2 db reduction in sound, you heard half as much noise.
Dwight
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| STL Mark |
07-13-2010 07:43 PM |
Jet engine = about 135+ db
AC/DC concert from 10th row = about 110 db
Cobra with straight pipes = ?
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| dlampe |
07-13-2010 07:54 PM |
Here is the story behind the question. I didn't communicate clearly with the fabricator at Hurricane and as a favor to me he was willing to cut out the standard baffle and weld in the Classic Chamber system before it was all ceramic coated. He was half right. I have a beautiful set of ceramic coated side pipes with a 3.5 inch straight tube through the muffler. Yeah, thats right, wide a$$ open! I know it will be loud but how loud? It is only about 10.7 to 1 compression but still, wide open?
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| blykins |
07-14-2010 05:31 AM |
I had Howe racing mufflers on my Cobra....which were basically straight through, big ID mufflers. They were 98dB mufflers. You couldn't talk to the passenger easily while cruising.
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| Hotfingrs |
07-14-2010 05:48 AM |
Quote:
You couldn't talk to the passenger easily while cruising.
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That means you weren't going fast enough, the sound was still beside you, GO FASTER, put the sound behind you. |
| jdean |
07-14-2010 07:52 AM |
Dean, it will basically be the same as the Howe muffler I would guess. Very loud. I had them on my CR and folks would put their hands over their ears when I passed them.
Best example is John Ross. You can hear him coming for miles...and you can hear him leaving for days!
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