Noise Emissions

[no.13]

Gidday Guys Donny here at Coffs we were asked to have some bikes tested on noise levels at the Nationals. Not official just to let everyone know this is coming.Everyone tested went over the limit. The noise meter is held stationary at rear of bike and bike had to be reved to xxx amount of revs which then gave a reading, revs are monitored through another dohicky near motor. Didnt watch this happen so i am a bit vage on it.

[Lozza]

G'day Donnie Yes we can all blame those f*^#!g 4 strokes.Just to show how silly things can get,when a Speedway was held at the Sydney Showgrounds there was strict noise limits all the little cars and bikes were lumbered with big 'Lukey' style mufflers (like the one pictured) while leaving we saw a EPA noise tester with his little meter.Being the inquisitive type I got him to give me a quick rundown on how the testing worked.Uh Mmm ....I see.... very interesting...uh huh.... and so on until I squeezed it out of him if anything had gone over the limit.Yes the crowd noise as way over."Hmmm do you test at the One Day cricket" I asked, no was the reply. "Why would we do that" he asked......... So there you have it a crowd noise from the speedway is somehow 'offensive' and apparently cricket yobs aren't

[Nathan S]

... revs are monitored through another dohicky near motor.

This is fascinating. Anyone know anything more about this?

Presumably some sort of inductive pick-up? Presumably with a switch for fourstroke vs real motors?

[fatboyracing]

Hi Guys,
Here is the testing procedure
Place the microphone 500mm from the exhaust pipe at an angle of approx 45degrees measured from the centre line of the exhaust at the height of the exhaust pipe The microphone must be a minim of 200mm from the ground where this is imposable due to low pipe the microphone should be placed 45 degrees above the outlet.
The readings should be taken with the engine warmed up,running steadily at the following revs
up to 85cc = 8000 revs
85cc to 125cc = 7000 revs
126cc to 250cc 5000 revs
251cc to 500cc 4500 revs
over 500cc 4000 revs

The test shall be done in a clear area 5MTS round with a background noise no more than 80dbs
Other then the sound testers (2) and the rider no one else should be within 3 MTS

Don't fool yourselves that you will not be tested and that Ma won;t spend the money to buy testing equipment and test bikes .All states have testing equipment now, I know because MTas have just spent over $1000.00 to get the test gear that all other states have already gotten.Myself and my assistant tested our first lot of modern bikes at the Tasmanian State Round on the weekend with 16 tested 12 passed and 4 failed. these tests were done to make people aware of the limits ready for next year.No bikes were disqualified but next year I don't know.

Cheers
Fatboy

[Freakshow]

probally a 100 kart tech digital tacho with a pick up cliped to your spark lead.  woops sorry sir the 2 smoker shows double pulses drrrrrrr.

The whole things a crock, you can quieten the scene, but thats not the niose, its the background niose, and yes lozza your un austrlain if you bagg all the niose the footy, rugby and cricket make , but hey MA are piss por when it come to flexing some muscle with the epa.  

[fatboyracing]

The Meter for reading revs is called a Sirometer and is avaliable at any Briggs and Stratton Agent. They are very accurate between 800 and 50000 revs. The unit is held on the side of the motor when running

The unit costs about $60.00

For more info www.treysit.com

Cheers
Fatboy

[Freakshow]

Place the microphone 500mm from the exhaust pipe

well ther you have it ? when was the last time someones head was 500mm from your pipe ?

political correctness gone made yet again,  the mic should be measured more than 10mm from the output, thats the closest any one can get to it on the track ? they measure rock concerts outside the stadiums, so why should theytreat motorsport any differant ?     IM goin to buy a set of golf clubs cause that the only sport well be playing in a years time.  This crap didnt work any where else in the world so why do they think it will work here ? the US flat track scene is imploding cuase the non pro rider who cant pass the DB allowances are having to pack up and drive home.  Would you like to drive across country to a race meet for 3-5 hours, even one hour to find you can just pack up and turn around ? Tasmania? theres a risk, might be fine tested here but if you get a differant reading overthere you pack up and come back another day.  this whole thing shits me because its beurocracy gone made again, and the sport should be fighting for it to be measured in a way that finds a medium, if my car has a complience plate prior to 75, i dont even need to have seat belts in it ? so go figure, a blanket raid on all bikes is unfounded and stupidity.     IT should be class based by technology like everything else in the GCR.     If my club is stupid enough to try to enforce it you'll find 40% OFf THE RIDER WILL QUIT.    then agai dont know why im venting here - no one here can change stupidity with logic.

[Freakshow]

For more info www.treysit.com

Cheers
Fatboy

yer right fool proof that gizmo 

[GMC]

Some of you seem to be making excuses so you can justify your loud bikes because it all seems too hard.
NOISE HAS KILLED MANY A TRACK/RIDING SPOT and it should not be taken lightly.
No, spectators don't have their heads 500mm from the exhaust but the test is done this close so other influences like buildings & bushes don't effect the reading, as has been suggested, it's all relevant.

The accuracy of any test will always be questioned, but if the majority of bikes pass & yours doesn't then I wouldn't be blaming the procedure.

Everyone likes to bag 4 strokes but at the end of the 2 stroke reign we had to endure the "shorty" muffler. What bonehead thought this up?

And most of America's noise problems have come from their own manufacturers who have enticed top riders to use loud systems ensuring that the masses would follow suit. These large companies have the resources to develop something better but won't put in the R & D. Europe has had tighter noise restrictions for a while without too much drama.

[Nathan S]

Too true Geoff, but the real issue is that this seems to be more about arbitrary limits than actual harm reduction.

Take HEAVEN's Buladelah track for example - there's only one house (that I know of) nearby, and its occupants were watching and enjoying the racing... If sending people home for having a too 'loud bike' from that venue has any benefits to anyone, then I'd love to know about them.

[Tim754]

 First up I bloody love the loud noises of racing engines on heat!!!, Vincent Speedway Sidecars ,Kawasaki triple two strokes on the asphalt, A Top Fuel Dragster making your ears pound and the air pulsate as it rockets past!!!!!!.........   but it all has to end. Yep make all the excuses you like about presumed dodgy measuring iinstruments but basically you got two options, quieten your machines or quit...... Oh lets try modifying tracks to stop noise traveling. Hmmm, Build embankments and sound deflectors. You cannot even get enough flag marshals on race days, how the  bloody hell you going to get lots of hard workers to do that sort of long heavy stuff??? not to mention the council  approvals and astronomical costs that would be totally out of sight for 100% clubs I know. Lets plant some growing noise covers, and wait 4,5,6 or more years not riding to see if they maybe grow and then possibly work.
Think does that noisy little prick on the Chink pit bike pisses you off! Yes! Our sports noises pisses others off just the same, they get our tracks closed forever!!!!!!!!! gone final ! not just stopped out for 1 meeting and told to fix it.
 Never thought I would say this and mean it,  Grow Up and Quieten Down.   Tim

[GMC]

That's fair enough too Nathan, but define nearby. I live about 4 K's from Broadford and can often hear the bikes, allthough it doesn't bother me ( I always consider that their teasing me, come out & play, come out & play) But I know of others that are closer & further than me and don't like it.

Also you don't set your noise limits for different tracks, it needs to be a uniform limit to be workable, so while it may not matter at one track your bike should be setup to ride at any track.

[Freakshow]

Some of you seem to be making excuses so you can justify your loud bikes because it all seems too hard.
 

personally i dont too shits what every body else does, but your right i along with alot of peaple cant be screwed having to mess abput making a 2 stroke muffler to make it make the limits, i dont have time to clean my air filter let alone piss about packing a muffler, or paying the rediculas prices you guys extort. FFS its noise , i live near thre airpport but thats my chioce.  Like it or not Timbo if you dont make it user frendly you can have all the track you like but when only 4 ridder turn up, they will be forced to close anyway, you think its hard getting people to a working bee, well you kill of the peripheral riders and crunch your track unworkable anyway, and not only cant you run the canteen but, no marshals, no gate staff no nothing.  you read up in the forum in the states and its not working there, and they cant get the equipment to work inthe pro classes so i dont care how much shit they buy up to test in AU its still a crock.  MY lawn mower pulls more than 100db and i mow for an hour at a time.

uniform > why why should my local track in SA  15 km from anywhere have to have the same levels as your ? thats bullshit, and you cant convince me other wise, that selfish on your part, you do what you like at your track , but dont go imposing your will on mine.   if it can out with a standard pipe it should be run, if it was sold with a db rating you should try and meet it, but like they say trying to make a elephant tip toe is stupid.   PS you can get great shrubs and acoustics that can be immediate effect on noice so i cant agree with you there, and i remeber when we had to have an air fence or we couldnt race and we had to hire one every event on the road races, same thing after awhile they realise it was a dumb idea and allowance were made, because it increased the entry fee by $20 a head, and people stopped riding overnight.  you might not be able to stop the noise debate, but it should be culled back so it is workable at your track.  Standard levels only work at national levels, at grass root levels it will kill interestate entry fees for sure, cause no one will chance it.

then again its only poxy VMX and some crust old bikes so who cares right.

[fatboyracing]

I agree with what every one says I personly think rules could be relaxed for Historic racing I.e Classic Motocross and Road racing .Our club lost a track just this week when when the local council revoced our permit 6 votes to 5 the person who successfuly complained to the council lives 2 km away, They are horse people and got all the people in the area to complain to Council. Saddly the council is full of crusty old F@#$%$ers that don't give a shit if we race or not.The young councilers did vote in our favor as they could understand that we only race there 4 Sundays a year and the noise from 2km away would be very low. We are now going to the appeals board.

Cheers
Fatboy.

[Lozza]

I have often argued that an efective lobby group would be invaluable in cases like fatboys.
If a similar weight of facts and figures about how much MONEY competitors spend in the town and how if you shut the track this goes to another town.Crusty old gits on the council look upon the decision differently.If you get the local Chamber of Commerce on side they can have influence with councils more than 'horse people'.I would present a barrage of facts & figures to show how things like this impact economicaly on the town/region and how towns like Bathurst have greatly benefited from having a race track.It's all crap but sounds better than 'we want to burn some petrol'