well i finally got some time to go to the audio shop in burnsville (
BZ3 CAR AUDIO) and they have a audiocontrol mic there. i hit a 144.8 at the begining of hynotize sealed up with the mic at the kicks. and a 144.3 with the mic on the dash.
airforces also hit a 144.5 at the kicks and 144.2 at the dash all sealed up. i actually lost DBs opening the windows. is that weird?
i know i have no proof of this but i just thought i would post it up. i completely forgot my camera.....
set up is:
single 12" Fi Car Audio BL, box tuned to 34hz
Rockford Fosgate 1500-1BD
Pioneer 6000UB Headunit
Polk audio Component set.
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is that a bad mic?
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did you block off the Vent thats in the back of the car ? gotta figure ur car acts like a sealed or ported box in ways, windows up more bass cuz theres no way for it to get out , windows down less bass cuz the sound is just venting out
Edited 1 time(s). Last edited Saturday, April 18, 2009 3:06 PM
ShowOff Customz
03 Cavalier
73 Beetle
68 Fairlane 500
Anton Miller wrote:is that a bad mic?
reads considerably higher than the Termlab.
JokerAKA Showoff03LS wrote:did you block off the Vent thats in the back of the car ? gotta figure ur car acts like a sealed or ported box in ways, windows up more bass cuz theres no way for it to get out , windows down less bass cuz the sound is just venting out
Both my truck and my car are louder with the window down. around 2.5 more DB difference
who knows. my Escort hit pretty nice though i never got it DBed wish i would have
ShowOff Customz
03 Cavalier
73 Beetle
68 Fairlane 500
what do you mean considerably higher? and i lost 1 db from rolling the windows down. but it was higher frequencies that lost the db im sure lower frequencies like a 32 or so would gain because of the sheet metal.
im going to try to go to a different shop to see if they can get a reading as well.
click sig for my car audio videos
dyno matted? id try got sealing up the vent in the trunk it might help u gain some more
ShowOff Customz
03 Cavalier
73 Beetle
68 Fairlane 500
sigh...
ThErS nO WaY 4 tha bass 2 leev tha car with the winders down, g0t that sumbitch cornered.
JBOvert wrote:sigh...
ThErS nO WaY 4 tha bass 2 leev tha car with the winders down, g0t that sumbitch cornered.
lol......
but seriously why does everyone else hit higher numbers wiith the windows down but not me?
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its not with both windows down. just to give you an idea of what my car did
142 sealed up on the Termlab mic on dash
144.6 drivers window down passenger up mic still on dash
140.x (dont remember) passenger window down mic still on dash.
Anton Miller wrote:what do you mean considerably higher? and i lost 1 db from rolling the windows down. but it was higher frequencies that lost the db im sure lower frequencies like a 32 or so would gain because of the sheet metal.
im going to try to go to a different shop to see if they can get a reading as well.
The AC reads about 5 or so DB higher than the termlab. Explain to me your sheet metal theory, I need a good laugh.
Lanman31337 - Cavfire wrote:Anton Miller wrote:what do you mean considerably higher? and i lost 1 db from rolling the windows down. but it was higher frequencies that lost the db im sure lower frequencies like a 32 or so would gain because of the sheet metal.
im going to try to go to a different shop to see if they can get a reading as well.
The AC reads about 5 or so DB higher than the termlab. Explain to me your sheet metal theory, I need a good laugh.
lol ok.
the sheet metal acts as a passive radiator when the windows or doors are open. so its just more surface area to move air and create pressure. thats is also why if you dynomat it may reduce your decibles, because it weighs it down so it cant move. however it may increase the decibels by stopping sound from escaping. or canceling noises from getting in.
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What about the guys who fill their panels with concrete? Are they killing decibels?
lol. i didnt know people do that.....
and i said the benifits if you reread what i said about stopping sound from getting out and stopping cancelation noises from getting in.
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Interesting.
However. Think outside the box, or actually inside the box.
So what kinda mic does DBDrag use? Dont mean to thread jack.
Termpro. Second, it doesn't act as a passive radiator, all it does is bounce waves everywhere. Less things resonating, less cancellation, higher numbers.
When you crack your window and certain frequencies get louder, welcome to a 6th order bandpass. It's generic, very inefficient, but that's what you got.
Anton Miller wrote:Lanman31337 - Cavfire wrote:Anton Miller wrote:what do you mean considerably higher? and i lost 1 db from rolling the windows down. but it was higher frequencies that lost the db im sure lower frequencies like a 32 or so would gain because of the sheet metal.
im going to try to go to a different shop to see if they can get a reading as well.
The AC reads about 5 or so DB higher than the termlab. Explain to me your sheet metal theory, I need a good laugh.
lol ok.
the sheet metal acts as a passive radiator when the windows or doors are open. so its just more surface area to move air and create pressure. thats is also why if you dynomat it may reduce your decibles, because it weighs it down so it cant move. however it may increase the decibels by stopping sound from escaping. or canceling noises from getting in.
STOP TALKING LIKE A GODDAMN PRO. THE LAST THING ANY INFORMATIONAL FORUM NEEDS IS SOMEONE WHO DOES NOT KNOW WHAT HE TALKING ABOUT ACTING SMART! YOU ARE 150% WRONG HERE.
On the other hand....you have other fingers.
In my family we teach that boys have a God-stick and girls have a Shame Cave. -John Stewart
JokerAKA Showoff03LS wrote:did you block off the Vent thats in the back of the car ? gotta figure ur car acts like a sealed or ported box in ways, windows up more bass cuz theres no way for it to get out , windows down less bass cuz the sound is just venting out
btw, you are also wrong. Spend some time talking to SPL competitors who do everything they can to squeeze more out of the meter before acting like you can give advice on the subject please. No more misinformation. Owning subs does not make you a car audio expert, people.
On the other hand....you have other fingers.
In my family we teach that boys have a God-stick and girls have a Shame Cave. -John Stewart
^^ Agreed.
And DbDrag uses a Termlab, or TL for short.
One hand is on a club for baby seals, the other is clenched to punch myself in the face.
You gotta stop that man, 1. PETA is going to get pissed eventually, and 2. your face is ugly enough, stop breaking it!
On the other hand....you have other fingers.
In my family we teach that boys have a God-stick and girls have a Shame Cave. -John Stewart
hey i was asked to say that. i didnt say that just to say "i know this. its a fact"
jesus christ people settle down a little bit.
also if you didnt notice i was asking why it did this and i had to go and think up a reason why it did that. i remember reading somewhere that the sheet metal acts as a passive radiator when the windows or doors are open. which got me to thinking. hey another port. therefor it would create more sound.
obviously i was wrong.
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