I’m sure many of you picked up in this in the news today that there is talk of a new acoustic camera system going to be trialled in the UK. No information on dB limits or distance they will be tested at but it would be good to get an understanding of what the dB of many of the popular exhaust systems are so that we know which may fall foul.
My system is a Pettit/Milltek with high flow cat. I also have the revi air intake system. Has anyone had this setup measured on a drive by at a track? If so what was the dB and distance?
Do we know what the dB limit and anything else such as distance of measurement for these new “cameras”?
Acoustic “Camera”
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delta0
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Acoustic “Camera”
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warpc0il
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Re: Acoustic “Camera”
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- delta0 (Mon Jun 10, 2019 11:01 pm)
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delta0
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Re: Acoustic “Camera”
Thanks. We can focus this thread on specific exhaust and intake setup dB values.
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New Duke
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Re: Acoustic “Camera”
Indicative values. Expect some margin. As every db check I've had done on track has given different readings. There's over 10db between the highest and lowest readings.
Only a precious few will have your fancy exhaust setup delta. Am curious to see if anyone with it will post. And yes I'm jealous
Only a precious few will have your fancy exhaust setup delta. Am curious to see if anyone with it will post. And yes I'm jealous
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- delta0 (Tue Jun 11, 2019 7:57 am)
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TerryH
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Re: Acoustic “Camera”
No drive by data.
Only info I currently have since REVi intake and RAM Air being fitted was the static test a Combe on 1st June. 86dB at 4.5k.
However was black flagged at Brands a couple of years back as (with standard intake) the drive by noise limit was being triggered now and again on the start finish straight.
Only info I currently have since REVi intake and RAM Air being fitted was the static test a Combe on 1st June. 86dB at 4.5k.
However was black flagged at Brands a couple of years back as (with standard intake) the drive by noise limit was being triggered now and again on the start finish straight.
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- delta0 (Tue Jun 11, 2019 7:57 am)
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Milltek Pettit Exhaust ( Decat/ Highflow Cat)
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mi60o0
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Re: Acoustic “Camera”
84 on mine full petit and aem intake
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- delta0 (Tue Jun 11, 2019 7:57 am)
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Done exhaust and work wheels
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Done exhaust and work wheels
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Re: Acoustic “Camera”
full bridge engine, faking beat scoop, k&n filter, ghetto decat and borla exhaust, 91 db static.
edit, also toyo clone header with a modified collector (y’know so it fits!)
edit, also toyo clone header with a modified collector (y’know so it fits!)
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GreySilver Beast
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Acoustic “Camera”
Standard Gearbox 'D' Mode : On the JDM Session at Castle Combe my reading for Full Custom Built Exhaust System was 83db at 4.5k Revs 
The System is set to give readings from 82db to 92db in Sport Gearbox 'D' Mode
The System is set to give readings from 82db to 92db in Sport Gearbox 'D' Mode
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Dr. FrankenRex
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Re: Acoustic “Camera”
Mine is loud... I'll just say that.
I'm doing work to reduce volumes.
Driving about on a normal road and normal road speeds then mine is within tolerance. On track I set off a 100db meter at Castle Combe, on drive by with the sound guy about 10-15 metres from track side...
I'm doing work to reduce volumes.
Driving about on a normal road and normal road speeds then mine is within tolerance. On track I set off a 100db meter at Castle Combe, on drive by with the sound guy about 10-15 metres from track side...
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mi60o0
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Re: Acoustic “Camera”
I'm really happy with my 192 84db at 4.5k full pettit well made exhaust IMHO
LEXUS LS430 4.3 v8 family car
Done exhaust and work wheels
Mx5 nd soul red Mike daily and work horse
Jessy’s Jaguar xkr 4.2 supercharged for fun family days
Done exhaust and work wheels
Mx5 nd soul red Mike daily and work horse
Jessy’s Jaguar xkr 4.2 supercharged for fun family days
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Dr. FrankenRex
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Re: Acoustic “Camera”
Not fantastically made, and when coupled with their dual res decat and an RB mani, no overly quiet either... 
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Juey
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Re: Acoustic “Camera”
Recall my Pettit cat back with RB dual res decat, std mani, std intake was 88 static at 4500 (Castle Combe)
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I can explain it, but I can't understand it for you.
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I can explain it, but I can't understand it for you.
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Re: Big Brother will soon be listening.
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delta0
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Re: Big Brother will soon be listening.
At least we have slightly more clarity on the dB limit. 90 dB for a forward facing camera. I think a straight pipe would be needed to trigger that.Delanor wrote: ↑Mon Nov 25, 2019 1:24 pmHows your RX-8 decibel limit? Acoustic camera test
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Del.
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geofftl1000r
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Re: Acoustic “Camera”
When 2 vehicles are caught in the same speed trap they use the 'ladder' on the road to confirm which vehicle tripped the speed camera.
I don't see how you can acoustically isolate a single motorcycle in a group of bikes?
Safety in numbers?
I don't see how you can acoustically isolate a single motorcycle in a group of bikes?
Safety in numbers?
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warpc0il
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Re: Acoustic “Camera”
Speed cameras use radar to trigger but the radar isn't certified to measure speed for prosecution.
The cameras take two photos, with a calibrated delay, and the position of the car across the grid between the two shots is the evidence of speed. It's surprising how many people pay the speeding ticket without ever being shown the two photographs that are required. It's also surprising how many times that people ask to see the photos and the speeding fine is dropped in favour of "a warning".
"Average speed cameras" also use two images, on consecutive cameras and a central system calculates the time/distance=speed.
We have lots of average speed cameras in NI, and there's many an idiot that brakes for each one, then accelerates between, somehow thinking that beats the system, either that or they keep changing lanes, as if that would work
Anyway, if the acoustic camera ever comes off then a front-facing camera isn't going to catch any bikes; with only rear numberplates
The cameras take two photos, with a calibrated delay, and the position of the car across the grid between the two shots is the evidence of speed. It's surprising how many people pay the speeding ticket without ever being shown the two photographs that are required. It's also surprising how many times that people ask to see the photos and the speeding fine is dropped in favour of "a warning".
"Average speed cameras" also use two images, on consecutive cameras and a central system calculates the time/distance=speed.
We have lots of average speed cameras in NI, and there's many an idiot that brakes for each one, then accelerates between, somehow thinking that beats the system, either that or they keep changing lanes, as if that would work
Anyway, if the acoustic camera ever comes off then a front-facing camera isn't going to catch any bikes; with only rear numberplates
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New Duke
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Re: Acoustic “Camera”
Oh they'll find a way to get bikers (and drivers) to feed the council coffers. All this will be working (and legal in no time). Whether it's by attaching a second camera that captures the rear numberplate once the vehicle has passed, or another method. No way they'll let that juicy money supply from motorists slip by. Will just take them a while to perfect their methods that's all. Lots of companies and councils have too much at stake.