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Fisker Ocean rated for 18,33kWh/100 km, Tires noise rated at 69 decibels.

1655 Views 22 Replies 12 Participants Last post by  MrStuff
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Something here doesn't add up.

18.33kWh/100km requires 129kWh of battery to go 707km (claimed One/extreme WLTP range).

129kWh gets you 440 miles (One/extreme WLTP)
113kWh gets you 383 miles (close to ultra WLTP?)

So, how big is the battery?
18.33 kWh/100 km includes charging losses.

They have not announced Ultra WLTP yet; once they do, it will be much closer to Extreme's WLTP.
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Is 69 decibels good? Any comparisons to other vehicles? And wouldn't speed be important to know?
It is a tire comparison, not vehicle. It looks like it is rated A from A to C. The test is done at 80 km/h. The rating is dependent on the width of the tire. Keep in mind that the 69 dB is the sound from the tire measured externally so is not the noise level within the vehicle. Also, Fisker has a different tire in Europe than the U.S. so doesn't even apply to the tires for the U.S.
yeah, so maybe he's asking to compare against other tires levels, and not vehicle???
Then refer to sentence 2 - It looks like it is rated A from A to C.
I find this kind of an amusing thread, with so much discussion about the tires decibel level. Have to agree that yes, the ratings are A thru E, but the picture clearly ranged it A thru C and gave it a BOLD A rating, so in someone's book that's a top rating....

Now then, about that 69 decibel level.... is there an actual spec somewhere that says that's outside the car??? I mean...who would care unless you're the Green Hornet and buy only silent series tires? I've never seen such a rating on what a car's tires noise puts out to the masses. Maybe that exists, but a decibel level for a given tire inside the vehicle, now that's a real spec someone could use when deciding on what tires to buy because some are certainly louder than others. And then no actual stated weighted measurement level is given.... @ A weighted or C weighted? That's a huge difference between the 2 because C weighted is WITH the bass included whereas A weighted is the LF (low frequency) filtered out for better overall measurements when determining harmful db levels in factories and such for workers long term exposure to factory noises.

Since road noise is mostly LF content, then if the measurement rating is very important if that rating was inside the car. If it was measured at A weighted readings then it would not give a good indication of a car's low frequency management and insulation. C weighted would be MUCH more useful.

If the 69 db measurement level was outside the car at speed, then one would have to determine how they made that measurement. Did someone hold out a mic and db meter outside the window on a stick? The wind noise could only be mitigated to a certain level and then what's left would have to be summed into the reading. Unless, the tire noise is somehow measured using a near silent dynomometer (or perhaps subtracting a known dyno db level)... really wondering how that measurement was made and what weighting.

I just want my frickin' ONE
If you are rating tyre (tire) noise, you can't do it from inside a vehicle as the noise from the tire will be very different inside a Honda compared to inside a Rolls Royce. Tire noise makes much more of a difference for EVs as there is no ICE drowning out the tire noise. Tire and wind are the two most prevalent noises for EVs.

As far as testing procedure, Google is your friend (or DuckDuckGo for anyone off the grid):

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How sturdy the taco tray is way more important to me. ….:unsure:
Which European agency handles taco trays?
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