Vehicle noise tests - New rules

[terbang]

Not some young buck mouthing of. Just an old one mouthing of.

That would be mouthing OFF, OF course...

[huck farley]

That would be mouthing OFF, OF course...

Yes that's right terbang. Mouthing off of course, you are dead right. I don't have a spelling correction programme like you on my Comp.

[Bren]

All I have to say Southern man is, that I have been riding myself for 40 years. Not some young buck mouthing of. Just an old one mouthing of. I am one of those senior riders that deserves respect also. But I don't give a horses arse If I do or don't. Anyway, Have a merry Christmas and a happy new year. That goes for every one who drops by and takes the time to read this post.
Cheers
Huck Farley

Ya know Huck Farley, after I read one of yer previous posts I thought to myself this guy might not be too bad..and thought I might shut up and maybe we might have a mutual truce...

For fucks sake. I'm an angel in comparison to you. On yer fukn bike sunshine. Your the first on my ignore list!!

...but after reading the last scathing post I feel it is only fair to say that you are an absolute asshole! I thought ya might jus be some immature kid, but now it seems ya are just an old arrogent retard who just hates the world. Who the fuck would use a sign in name like yours, cos for a start your name in itself would piss off people!
Besides which mate, I may post some stuff that may be controversial, but I do not normally go around insulting people to their face (unless they are arsewipes like you that frikkin deserve it!).
Do yerself a favour and go and take yer Valium, cos man you are so frikkin wound up you need it!

[HRT]

So.... how bout that topic that this thread is actually about?

The subjective test sucks...it's like saying I don't like the colour of your bike,the objective test removes my personal opinion from the equation.

Exactly. Few things in the inspection that are subjective and its up to the AVI to make a call on if its legal or not. If you say it is and something happens then it can be your arse on the line, and if you fail it you get to put up with the shite from customers.

It is a good idea, annoying that you are going to piss customers off by saying they need to get it tested only to find out its perfectly legal. Extra expensive they have to shell out for. At least its only once I guess.

[ElCoyote]

Deeper frequencies can still be at the same SPL level as the tones that are piercing and "too loud". Deeper frequencies have more compression force in them and do more damage not only to your hearing but to everything.

A guy standing in front of a W bin at a rock concert would have his kidneys destroyed from the bass.

I've had a 17hz sine wave fed through a PA system and average levels and after a few minutes had to get him to shut it off as my chest was tightening and I was on the verge of vomitting.

All you are talking about is obvious sensitivities of the human hearing, not the complete effect.

When you are sleeping a low rumble is at least as disturbing as something screeching its head off.

+1 As beauty is in the eye of the beholder so indeed is sound selective. Trucks and buses assail the senses less than a boy racer yet register more on decibel metre. Personally I prefer the bus and truck over a pissant 4 cyl ricer with a 4" pipe which is significantly bigger than the penis of the driver.

A Ducati and a Subaru is music to the ears yet is still in the no-go range
but sweet nevertheless providing they are not red-lined at 2:00am

[terbang]

Yes that's right terbang. Mouthing off of course, you are dead right. I don't have a spelling correction programme like you on my Comp.

Umm, Errr... No. Last time I used a spell checker it was quite happy with the words off and of. Sort of like, if yer gonna attack people by spraying bullets at them, then make sure you can use a gun. So when on the attack with words..?
Selamat Hari Natal dan Tahun Baru. Bung.

[terbang]

Oh and back on topic. I reckon that nearly all motorcycles emit an awesome sound, even the Harleys and it is a shame that laws will soon be passed to quiet them down. Riding up the Sydney M5 at 130 kliks got me a $400 odd dollar fine, fair enough I was riding a potential missile and speeding. However on the same motorway there were large signs that warn of a $2000 fine for excessive noise! Figure that one out.

[The Lone Rider]

+1 As beauty is in the eye of the beholder so indeed is sound selective.

Well it's not even that. The human ear is very selective, and because of the way the ear canal is shaped, tones around 1khz stand out most (this has to do with communicating with other humans). Perfect hearing is from 20hz to 20khz (and thats only like that in a new born baby, our hearing degrades from then on), but the receptability of the ear to the frequencies in that range vary greatly.

Between the range, our reception is not a line.

----------------------------

The term for it escapes me, but it is why when sound levels are tested they are done on what's called an A weighted scale. Or at least it should be.

Another thing to also take into account is that we are less directionally receptive to low frequencies, where as higher frequencies we can hear from left/right/front/back (hass effect).

That is one reason why those home theatre systems with a "left and right" sub woofer is a really stupid thing to buy.

[YellowDog]

A tough one to enforce for bikers.

It will be good to get a Police view to this subject.

I suspect it wiill be used to silence the 4 wheeled hoons!

[Pancakes]

......................... Personally I prefer the bus and truck over a pissant 4 cyl ricer with a 4" pipe which is significantly bigger than the penis of the driver....................................

I HATE when a bus stops next to you and vents it's compressed air in a super loud Psssssssttt!!!! It is painful to be near and can't belive they can do it legally. The problem is some people like SUbaru's and not busses so the test would have to be a total dB rating and not allow for perspectave at all to be fair.

.....................That is one reason why those home theatre systems with a "left and right" sub woofer is a really stupid thing to buy.

And getting one Sub in phase (a musical one not a "doof doof" one) is hard enough given room nodes etc, two is a drama thats good for nothing except helping the staging of the "lifestyle" sattelite speaker systems with real high XO points.

[The Lone Rider]

I think you mean room modes

And sounds like you are a semi-new grad of MAINZ.

And yeah, any woofer worth its beans should be able to do at least 25hz and then for the mode to fit perfect you need like a 15m3 in all directions and the speaker centered lol.

But then if you were crazy about room modes then you'd also chuck a graphic equaliser in the chain and borrow a reference microphone.

And woofers suck, they are all just ported bins. W bins rock hard.

If there was a very standardized pipe system for bikes (which would also make bikes kinda boring) it'd be very easy to baffle as needed.

Theres a guy in Hamner I think makes pipes that have folding baffles and you rotate a screw and it adjusts the air flow/noise level to whatever you want.

[Pancakes]

I think you mean room modes

Nope, nodes is what I have always read and called them.

And sounds like you are a semi-new grad of MAINZ.

Nope.

And yeah, any woofer worth its beans should be able to do at least 25hz and then for the mode to fit perfect you need like a 15m3 in all directions and the speaker centered lol.

Yeah but I don't have space for mine now so am converting it to a 4th order isobarik sub. Will fit by the couch nicely. Not much less volume (size) than the flatter W but squarer.

But then if you were crazy about room modes then you'd also chuck a graphic equaliser in the chain and borrow a reference microphone.

Done just recently as we moved house. Moved the tweeter/mid XO down and need to make an L-Pad for the spike that is there now. Not very noticable but a bit harsh on some tracks. Have a reference mic too.

And woofers suck, they are all just ported bins. W bins rock hard.

Ah! But they let me get a flat responce down to 25Hz and a slow enough roll off after that that they're well worth the cost of amps and the space. With electronic music or anything once the volumes up I always have them on. Have a 2 channel 50 band eq also but don't like using too much boost so try to get the speakers right first.

If there was a very standardized pipe system for bikes (which would also make bikes kinda boring) it'd be very easy to baffle as needed.

I don't think there needs to be a standarised system in place. The really loud ones are as far as I'm aware all aftermarket ( and I'm calling Screaming Eagle aftermarket too even tho lots come dealer fitted) All you'd need is a dB limit in place and if a shop fits the pipes, they test then rivet on the plate stating the volume and that it's under the limit. If you fit them yourself you go for a new WOF to get your cert plate. Most pipes are for certain makes/models and are tested specifically already. What a Honda VTR 1000 likes a Honda CBR 1000 most probably won't so a reasonable assurance could be given that the outcome will be know before fitting.

Theres a guy in Hamner I think makes pipes that have folding baffles and you rotate a screw and it adjusts the air flow/noise level to whatever you want.

They make those for cars too but for racers or track day bikes aren't the systems with removeable bungs enough? The cert plate would be for the fitted pipe with all inserts removed of course. You can then runn your pipe with it in if you don't want to wake the kids when you get home or go numb eared on a long ride etc.

[The Lone Rider]

Room modes matey

http://www.google.co.nz/search?q=Roo...ient=firefox-a

[Pancakes]

I was curious so Googled "modes" and "nodes". Seems Modes is more common but they are used interchageably . I have played with stuff lots but no formal training as opposed to all the "done a course" bunnies who've never built or tested jack-shit (also bung head right now and memory is all whack so I'd never say your wrong).

[RDJ]

I won't be treated like the new kid at school mate If I want to disagree with some half wit (and there is a terrible lot on this site) then I shall do so. <> But hey pal newbie or not. This fella takes a backward step for no cunt.

Ah, the enchanting poetry of your discourse. Seriously Huck when your arguments have merit it's easier for others to appreciate without a cloud of abuse obscuring your points...