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Joined 9 months ago
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Cake day: October 20th, 2023

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  • I’ll preface this by saying that this isn’t an argument in favor of the imperial system, nor is it an argument intending to detract from the usefulness of the metric system. But I have wondered if there is some merit to having a simple, colloquial, “human friendly” system of measurement — something that’s shown to be the best system for people to grok, and is the most convenient to use in day-to-day life. If you need precision, and well defined standards, then certainly use the metric system, but is the metric system easy for people to grok? Say you ask someone to estimate a length. Would they be more likely to accurately estimate the length using the metric system, the imperial system, or some other system? Likewise for telling someone a length and asking them to physically reproduce it. Would they be more likely to do so with the metric system, the imperial system, or some other? It’s an interesting problem, imo, and it doesn’t seem to get much attention.

    It could very well be that people can, indeed, grok measurements the best when using the metric system, but I currently am unaware of any research that has been done to show that. If anyone is aware of any research that has looked into this, then please let me know! I’d be very interested to read it.













  • That doesn’t make much sense. ICE vehicles have got so quiet, especially at low speeds, that most of the noise is tyre noise.

    What doesn’t make sense? The point that you just stated was precisely the motivation for the study — there was a concern that EVs and H-EVs are too quiet to be safely perceived by pedestrians.

    There were far fewer models of electric and and h-ev cars being available during the time of they’ve taken their data from (7 to 11 years ago now) than ICE and even compared to how many there are now. Therefore it’s entirely possible that an issue with a particular model (for example visibility issues caused by a pillar blindspots) could skew the results.

    In the “Strengths and weaknesses of the study” section of the paper, they touched on the age of the data being a weakness. In addition to the concern that you pointed out, there are also new regulations that have been put in place to mitigate these issues — e.g. the NHTSA mandates that cars have a minimum amount of sound that they must emit [source].

    It would be interesting to see if they can get the same results with 2019-2024 data.

    Agreed.