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audiomick

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Posts posted by audiomick

    Bikes Bomb in Britain

    in Special place for banter and conversation

    Posted

    On 6/2/2024 at 1:48 AM, Guzzi-in-Vancouver said:

    ... a policy of deliberate population replacement

    Mate, you have got a hold of the wrong end of the stick.

    There is no policy of "population replacement".

    What there is, is lots of countries where the people are having a really hard time, harder than we can imagine, and a few countries (i.e. where we live) where life is good.

    Any wonder people are trying to get from the bad places to the good places.

    If you can't see that, you need to get out more. :huh2:

    • Like 3

    MotoGP

    in Special place for banter and conversation

    Posted

    8 minutes ago, p6x said:

    ...will Marquez be able to keep his Red Bull sponsorship in the Ducati factory team?

    I doubt it. Red Bull sponsors sportspersons and events to advertise Red Bull. Full stop. They're not likely to be interested in carrying a motorcycle manufacturer along for the ride. :huh2:

    My coffee is awful this morning.

    in Special place for banter and conversation

    Posted

    Bialetti: yes, the best option after a really expensive "proper make it by hand" espresso machine.

    I don't have an established "house brand". I quite like to try different sorts.

     

    As far as the Australian "coffee culture" goes: Germany is a country in which rather a lot of coffee is consumed. I have seen threads on German forums that get very intense about which beans, how to grind it, what temperature, and so on. Despite all of that, if you go into a cafe here in Germany and get really lucky, you might get a good coffee. But you probably wont.

    In Australia, particularly in Melbourne, in my experience, if you go into a cafe and get a coffee, you have to be really unlucky to get a coffee that is not at least pretty good.

    • Like 1

    I purchased a Shark Skwal i3;

    in Special place for banter and conversation

    Posted

    9 hours ago, p6x said:

    ...wind noise is part of the overall safety...

     

    Including what it does to your ears.

    But to be fair, how loud a helmet is does depend to an extent on the seating position of the bike in question, and whether it has a fairing, and if so, how high. And how tall the rider is. And so on.

    So it is a bit difficult for a helmet manufacturer to make a helmet that is definitely quiet under all foreseeable conditions.

    Having said that, good helmets tend, in my experience, to be quieter.

    For "good", read "expensive". :huh2:

    • Like 1

    New bike time!

    in Special place for banter and conversation

    Posted

    21 hours ago, pete roper said:

    Victoria is a whole other thing. Traffic enforcement there is draconian. ...

    Yes, and that is where I grew up and lived until I came here in 1996, and where I spend a good part of my time any time I get back over.

     

    As I have already indicated, I like the German Autobahn. In a lot of ways a lot more relaxing than the Hume Freeway, even if you have to contend with impatient bastards coming up from behind 80 km/h faster than you are doing, and you are already doing 170 km/h. Or you are doing that sort of speed, and some whacko doing 110 km/h pulls out in front of you to pass a truck (they are only allowed to do 80 km/h, even on the unlimited sections) because he can't wait 30 seconds to let you pass.

    So you are very, very concentrated on the Autobahn, but it is still better than  constantly watching the speedo and looking for the bacon behind the next bush. On the unlimitied sections, apart from taking account of what the traffic is doing, you can just drive at whatever speed you and the vehicle are most happy with. B)

    • Like 4

    I purchased a Shark Skwal i3;

    in Special place for banter and conversation

    Posted

    19 hours ago, p6x said:

    So, after your post, I did a full immersion in decibels, and wow.... it is anything but simple.

    I thought I just needed to plot decibel levels on a semilogarithmic scale, just to figure it out, but there is more than one type of decibels.

    I am not even certain the Champion comparison should be Db, or Db(A).

    Well, it is simple on the one hand, but not so simple on the other.

    There is only one type of decibel, but...

    as I mentioned further up, it is a relative unit, i.e. x dB is not an absolute value, but rather always a "more than" or "less than" value. The "difffernt types of decibel" are in fact not different decibels, but rather different specified reference values. For instance dBV states a value relative to 1 Volt. There is a listing of the suffixes here

    https://en.wikipedia.org/wiki/Decibel#List_of_suffixes

     

    A dB figure regarding the loudness of something is almost always dBA. That is included in the linked list of suffixes.

    • Like 2

    BAD STUMBLE OFF IDLE UNDER LOAD

    in Technical Topics

    Posted

    My "best" infancy failure: I was working for an Outside Broadcast company at a motor race (cars) event at the Phillip Island track, the same one that the bikes run on.

    A colleague and I were sent out to change the 9V block battery in the microphone pre-amp on a mic around the other side of the circuit. Maybe 1.5  or 2 km from the O.B. truck. We drove around to the mic, changed the battery, confirmed via Walky-Talky with the truck that it was working, and headed back. We hadn't driven more than about 500 metres on the way back when the truck called us up and sent us back to change the battery again. It was dead, less than 5 minutes after we took it out of the packaging. :huh2:

    • Like 1

    BAD STUMBLE OFF IDLE UNDER LOAD

    in Technical Topics

    Posted

    3 hours ago, gstallons said:

    ... If all of this is done perfectly get w/someone about "remapping" your pcm....

    But only when everything else is definitely sorted. There is no point dicking around with the map if a sensor is not working, or something "simple" is mechanically not working as it should. :oldgit:

    • Like 1

    I purchased a Shark Skwal i3;

    in Special place for banter and conversation

    Posted

    2 hours ago, p6x said:

    ... so, 2 decibels difference, not much.

    I beg to differ. Decibels are a relative unit, and logarithmic. That means that 2 dB does mean a significant difference in sound energy. Whoever can be bothered can look here, for instance:

    https://en.wikipedia.org/wiki/Decibel

    https://www.quora.com/How-many-dB-decibels-represent-a-doubling-or-halving-of-the-sound-volume

     

    2 dB difference is a difference that the untrained ear registers as "that is louder". As far as exposure to noise goes, it can be quite relevant, depending on how loud the environment is and how long the exposure is. 97 dB, probably dBA, is quite loud. 99 dB is very loud.

    To get it into perspective, look here. I don't know how reliable the publisher of the site is, but the numbers more or less correspond to that which I have seen elsewhere

    https://www.asha.org/public/hearing/loud-noise-dangers/#dangerous

     

    2 hours ago, p6x said:

    ...Alpine Motosafe earplugs.

    Unfortunately, wearing them attenuates even more the speakers in my helmet

    Any wonder. According to the information on their site, they dampen by 30 dB at 2 kHz. That is really a lot, and 2 kHz is a frequency that is really important for the transmission of information (speech, awareness of the surroundings, whatever...).

    So an ear plug that dampens that much will indeed provide good protection, but will also isolate you from your surroundings.

     

    By the way, this

    Quote

    filters that are tuned to only get rid of the wind noise frequency

    is nothing more than marketing bullshit. I believe I wrote in another thread that wind noise is not a single frequency, but rather very broad band, i.e the entire range of audible frequencies is involved. You simply can't filter out "the wind noise frequency". All you can do is dampen everything. How isolated you feel then depends on the "frequnecy response" of the filters. If they are neutral (flat), you will still feel like you are in touch with the surroundings to an extent.

    The Moto Safe ones are anything but flat. Their figures

    Quote
     
    Frequency Hz 63 125 250 500 1000 2000 4000 8000
    Average noise reduction value dB 18.8 18.4 18.4 16.3 19.0 30.5 21.9 23.4

    show that they dampen significantly more in the high frequencies than in the mids and lows. Particularly the difference between the damping at 500 Hz and 2 kHz is extreme.

    They must sound like shit. B)

    • Like 1
    • Thanks 1

    Small air compressors.

    in Special place for banter and conversation

    Posted

    1 hour ago, activpop said:

    ... those small portable ones

    I've experienced two in that size range. The previous car, an Opel Corsa, had one and a can of "instant repair" instead of a spare tyre, as does the current Opel Astra.

    They are both of a size that one could take them on bike with capacious luggage, but big enough that I wouldn't like to unless I really had to.

    I can say much about longevity, as I have only used them a total of 4 or 5 times. They do work. They are both surprisingly loud, annoyingly so, and slow. Because they are so small, I guess, the pumped volume cannot be very much, so they take a long time to deliver an appreciable amount of air.

    Determining the Sump Oil Level

    in Technical Topics

    Posted

    Thanks for the tip Pete. I wasn't aware that Guzzi had ever made a sensible dipstick. B)

     

    I still might buy one or three from Meinolf, though (no, not him, the other Meinolf...) because his work is really quite pretty, and he's a nice bloke into the bargain. And he also makes them to fit the small blocks, i.e. suitable for my Breva 750 and my V35 Imola. :)

    Incidentally, he (the Meinolf in question) has a V65 track bike modified to a mono-shock rear suspension. It looks a bit "utilitarian", but the longer you look at it, the more stuff you discover that he has modified. Cool bike. :bike:

    Here are a couple of pictures of his dipstick.

    IMG-2747.jpg

    IMG-2752.jpg

    • Like 2
    • Thanks 2
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