Change Of Engine Note

Dedicated to technical discussion...
User avatar
PJ640
Posts: 19
Joined: 10 Mar 08, 06:38
Location: Western Australia

Change Of Engine Note

Postby PJ640 »

Has anyone else noticed that when during on board camera shots, whether it be in the cockpit, looking out the rear etc, that the engine note changes during upshifts? (aside from the obvious change of engine noise)
It sounds as if momentarily a lower gear was selected instead of a higher one.
It isn't a KERS boost (according to the graphics on the screen), and it can't be wheelspin so I was wondering what causes it.
The commentators never mention it, so the only other theory is that there is a glitch in my recorder. I don't like this theory though because I have noticed it happening quite often, and it's always in acceleration zones during what should be upshifts.
Any ideas? :confused:
User avatar
texasmr2
Posts: 15916
Joined: 15 Sep 07, 12:43
Favourite Team: Ferrari
Location: Texas

Re: Change Of Engine Note

Postby texasmr2 »

Yes I have noticed that also and I find it strange aswell?
"Sanity and happiness are an impossible combination".
Mark Twain
User avatar
madbrad
Posts: 3194
Joined: 04 Mar 07, 00:34
Location: Pickering ON Canada

Re: Change Of Engine Note

Postby madbrad »

The graphic is a couple seconds behind the sound and picture from what I can glean. Don't know if that would account for your problem.
sent from my supercray using assembler.
_______________________________



Image
DON'T FEED THE TROLLS!
User avatar
McLaren Fan
Posts: 8005
Joined: 24 Jul 07, 11:40
Location: Belfast, Northern Ireland, United Kingdom

Re: Change Of Engine Note

Postby McLaren Fan »

The sounds seem to be wrong as well. It's almost as though you are hearing two or more cars at once; for instance, you may hear the sound of a car whose onboard camera you are watching, as well as another car further behind or ahead which is braking and downshifting. The technicians need to sort it out.
Image
Ayrton Senna: WDC 1988, 1989, 1990, 1991
McLaren: WCC 1974, 1984, 1985, 1988, 1989, 1990, 1991, 1998, 1999, 2007
McLaren: WDC 1974, 1976, 1984, 1985, 1986, 1988, 1989, 1990, 1991, 1998, 1999, 2008
Gaz
Banned
Posts: 7995
Joined: 23 Sep 08, 22:39

Re: Change Of Engine Note

Postby Gaz »

apparenlty its an audio issue.

might be KERS in some cars if it goes up though.
User avatar
Frosty
Posts: 1689
Joined: 14 Mar 08, 02:04

Re: Change Of Engine Note

Postby Frosty »

Yeah I hear it as well, sounds like they are shifting when they are not.
Image
Remember "competitive animals know no limits"
User avatar
Denthúl
Posts: 8005
Joined: 07 Feb 08, 22:01
Favourite Team: Sauber
Location: Bury, United Kingdom

Re: Change Of Engine Note

Postby Denthúl »

Could it be the implementation of a lower rev limit than last year? The engines would have been designed with the 19,000RPM limit in mind (as there were, at the time, no plans to change it) and so some manufacturers may have had to stick something extra on in order to sort that.
Image
User avatar
Gilles 27
Posts: 2187
Joined: 28 Jan 09, 20:31
Location: Leicester, England

Re: Change Of Engine Note

Postby Gilles 27 »

Its a sound issue according to Martin Brundle, I thought it was KERS too at first. I can't imagine what kind of sound issue would cause that though...
Image
User avatar
Jensonb
Posts: 5329
Joined: 23 Jan 08, 23:49
Location: United Kingdom

Re: Change Of Engine Note

Postby Jensonb »

Does anyone have a recording of the specific issue? I can't really figure out what you mean.
Image
The Frome Flyer: Smoother, Smarter, Calmer, Winner.
Jenson Button: Professor, Chauffeur, World Champion Racing Driver.
User avatar
madbrad
Posts: 3194
Joined: 04 Mar 07, 00:34
Location: Pickering ON Canada

Re: Change Of Engine Note

Postby madbrad »

MB has on numerous occasions pointed out that the radio conversations are aired a few minutes after they occur.
sent from my supercray using assembler.
_______________________________



Image
DON'T FEED THE TROLLS!
User avatar
PJ640
Posts: 19
Joined: 10 Mar 08, 06:38
Location: Western Australia

Re: Change Of Engine Note

Postby PJ640 »

Thanks for that !
Atleast a few other people have heard it too, I guess that rules out a glitch in my recorder.
It can't be an issue with time delay with the audio, because while the pit to car radio messages are most certainly delayed, the in car audio is realtime (give or take a few nanoseconds).
User avatar
PJ640
Posts: 19
Joined: 10 Mar 08, 06:38
Location: Western Australia

Re: Change Of Engine Note

Postby PJ640 »

It happened again during the Turkish Gp.

On lap 36, whilst we were on board with Barrichello it occured. Martin Brundle was just beginning to explain why this sound issue occurs, when Channel TEN in Australia interrupted with some adverts. Martin began by saying ;

"That funny noise you hear? We think that's when they're changing from cells, from um.........."

Did anyone hear the end of Martins explanation?
:confused:
User avatar
bud
Shrub
Posts: 17636
Joined: 10 Jan 06, 03:02
Favourite Driver: Ayrton Senna, Lewis Hamilton
Favourite Team: McLaren
Location: Adelaide, Australia, ɹǝpun uʍop

Re: Change Of Engine Note

Postby bud »

PJ640 wrote:It happened again during the Turkish Gp.

On lap 36, whilst we were on board with Barrichello it occured. Martin Brundle was just beginning to explain why this sound issue occurs, when Channel TEN in Australia interrupted with some adverts. Martin began by saying ;

"That funny noise you hear? We think that's when they're changing from cells, from um.........."

Did anyone hear the end of Martins explanation?
:confused:


Yeah he did go on to explain it didnt he, but Ten didnt interrupt it was Martin getting distracted by pitstops from memory, i was hanging for him to get back to his explanation it but he didnt :banghead::hehe:
User avatar
bud
Shrub
Posts: 17636
Joined: 10 Jan 06, 03:02
Favourite Driver: Ayrton Senna, Lewis Hamilton
Favourite Team: McLaren
Location: Adelaide, Australia, ɹǝpun uʍop

Re: Change Of Engine Note

Postby bud »

I rekn it might just be the rev limiter kicking in