Back up sound.

SonicBlue

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https://isoes.info/wp-content/uploads/2024/01/isoes.2021_015.pdf
This study admits that there is insufficient data to come to a clear conclusion, but suggests that backup alarms aren't effective at preventing such incidents. It specifically calls out backup cameras and other safety measures, but doesn't actually cite any data to back that claim either. I think it's also worth noting that the safety fact sheet doesn't call out audible alarms at all either.

This study does mention "habituation" to backup alarm sounds possibly contributing to their ineffectiveness, which makes me thing that the weird sounds described in this thread are specifically chosen to address that. So it's definitely possible that louder-than-expected UFO backup alarms are much more effective than traditional ones, or even other backing safety measures.

I think it would be cool if it put on the flashers for you or some other light signal when you go are moving backwards (not just in reverse). In a lot of vehicles you can't really trust the white lights on the rear to be an indicator that someone is actually reversing. I swear some people just sit there in reverse it seems like

ETA: The real solution that nobody is talking about is putting a card in the spokes. :sunglasses:
When one goes searching for studies on the issue, it’s kind of shocking how little research there actually is. Especially for an issue people seem so smugly confident about.
 

SonicBlue

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It certainly is. I don't know the answer, but everything we do has an acceptable number of deaths. I don't presume to be the one who says what that number is, but if it's always zero, we wouldn't have cars in the first place. I agree this is a first world problem, but personal preference is valued over safety in much more flagrant ways. (think huge lifted trucks that are perfectly street legal but incredibly dangerous)

I'm not advocating one way or another, but just saying that the argument is not as cut and dry as some might think.
This is 100% correct. The “if it saves one life” argument is tremendously stupid. We saw it trotted out again and again in the Covid era. All public safety decisions involve a balancing of risk versus cost/inconvenience. One could make the same argument about reducing the highway speed limit to 40mph - it would save some lives - but nobody would put up with that.
 

Pioneer898

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This is 100% correct. The “if it saves one life” argument is tremendously stupid. We saw it trotted out again and again in the Covid era. All public safety decisions involve a balancing of risk versus cost/inconvenience. One could make the same argument about reducing the highway speed limit to 40mph - it would save some lives - but nobody would put up with that.
While we’re in agreement, literally millions of people died from COVID, so it’s probably not the best example. Turning your phone in airplane mode is something I think we can all get behind. AFAIK there have been no real cases of cell phones causing actual danger to a flight.
 

Sikkun

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While we’re in agreement, literally millions of people died from COVID, so it’s probably not the best example. Turning your phone in airplane mode is something I think we can all get behind. AFAIK there have been no real cases of cell phones causing actual danger to a flight.
There is a subset of people who don’t believe Covid killed millions of people and therefore doing anything was the wrong answer.

Not surprisingly there will be a large overlap with that mindset and thinking a back up noise is ruining your constitutional rights and somehow took away your freedom. Just like those pesky seatbelts and demanding you can’t drink a nice beer while driving home after a hard days work.

Also things people argued were stupid safety laws that should have never been passed.
 


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I don't doubt it adds to safety, I think for me the question is how much? My instinct say that the number of incidents that were avoided specifically because of a backup sound on a passenger vehicle would be almost negligible. It feels like it's the responsibility of the driver not to hit people, not the responsibility of the passenger to jump out of the way. That's why this is a thing for large trucks and heavy machinery, because those vehicles typically have poorer visibility and as such makes it substantially more difficult for the driver to ensure there are no pedestrians in danger. A small passenger vehicle (with a backup camera and the 360 camera) makes that responsibility for drivers easy.

So again, safety is important, but I just would be surprised if this is increasing safety by any significant margin. But I could be wrong, and I'll have to do some digging to know for sure.
Even if it is almost negligible, I would say the juice is worth the squeeze.

The downside of the noise is minor annoyance and the upside is saving lives.

The hard part is it’s impossible to know how many accidents and injuries are prevented because they didn’t happen.
 

SonicBlue

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While we’re in agreement, literally millions of people died from COVID, so it’s probably not the best example. Turning your phone in airplane mode is something I think we can all get behind. AFAIK there have been no real cases of cell phones causing actual danger to a flight.
How about the “6 feet of separation” that turned out to have zero scientific basis. It just kinda sounded good. Or how about wearing a mask while walking to your table at a restaurant, but then you could take it off when seated? We did a LOT of really dumb, really scientifically dubious things during that era.
 

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While we’re in agreement, literally millions of people died from COVID, so it’s probably not the best example. Turning your phone in airplane mode is something I think we can all get behind. AFAIK there have been no real cases of cell phones causing actual danger to a flight.
Many died after they were vaccinated.
 

SonicBlue

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Even if it is almost negligible, I would say the juice is worth the squeeze.

The downside of the noise is minor annoyance and the upside is saving lives.

The hard part is it’s impossible to know how many accidents and injuries are prevented because they didn’t happen.
I’m guessing a study could be devised. And it’s more than a minor annoyance. It’s also noise pollution which, ironically, many of the same advocacy groups complain about because it clutters their sensory perception.
 

Mach1E

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First, an EV in motion isn’t “silent.” It already makes noise. The question is how much.

Second, yeah I do think it would be a good idea to have some peer-reviewed research into just how beneficial these noise-makers are. Because I don’t think it is “common sense” that this added noise pollution is meaningfully increasing safety.
How can you measure something that didn’t happen?

No way to measure how many accidents were prevented.

We do have stats on backup deaths though and that is enough that we should do more to prevent them if possible.

Would be interesting to hear about backup deaths on ICE vs hybrid vs BEV. If the silent hybrids have more accidents that would tell us something.
 

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There is actually no requirement that says it needs to sound the way it does. Just that it needs to be audible.

Ford has placed this exact same backup chime on many of their latest cars and trucks. Even our new company F350 has it. My experience in the Lightning is that nobody consciously notices it in parking lots. People just walk behind me when I'm in the process of backing up. But whatever... I hated the stupid backup chime at first. Now I don't give a flying fart. Almost wish it was more annoying.

The sounds I absolutely hate on my Lightning are the stupid loud screaming beep when we open the frunk or if I drop the tailgate from the button inside the cab. That frunk beep serves no purpose whatsoever other than to get people to look at you with that "WTF?" expression on their face. Yes, you can remove the frunk beep noisemaker. But the truck throws an error code if there's nothing plugged in and it doesn't detect resistance. I ended up putting my noisemaker back and just gorilla taping a rubber pad to the speaker. Now it's silent. When I took it in for the 10K mile checkup and tire rotation, they noted the frunk beeper wasn't working and I told them what I did. Service advisor just kinda shook his head and scratched it off his list. I think he was relieved they didn't have to pull the front end apart to fix it.
 

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Took the car in for tint today, when they pulled it in I got to hear the back up sound for the first time. Only had it a few days and haven't been noticing it from inside. Would be nice to have an option to change the sounds.
The regulations prohibit automakers from giving consumers a choice on sounds: one sound only. This was for convenience in certifying that the sounds met the standards.
 

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There is actually no requirement that says it needs to sound the way it does. Just that it needs to be audible.
I didn’t say there was. I was answering the question of why Ford doesn’t give the option of turning it off.
 

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I’m guessing a study could be devised. And it’s more than a minor annoyance. It’s also noise pollution which, ironically, many of the same advocacy groups complain about because it clutters their sensory perception.
There has been a study on this, initiated in either 2011 or 2013. To study whether or not battery electric vehicles and hybrids were too quiet and a safety risk in low speed areas. Terrible study, actually. Initial findings were reported to congress in 2016, IIRC and follow up in 2019 or 2020. The recommendation was that vehicles operating "silently" on electric power should emit a tone or some audible noise at low speed to increase awareness. The two separate reports read as if someone just phoned it in without actually studying anything. There was no significant data study or comparisons of background noise in various environments. In many urban environments, newer ICE vehicles are effectively silent too. Many are truly silent unless you're in direct shot from the tailpipe.

A proper study would have determined noise levels for any and all vehicles in contrast with dynamic environments. Perhaps a recommendation of producing an audible sound or tone at a certain dB rating over background would be a better standard to apply to all vehicles? Up to a certain point of course so as not to be inflammatory of the rampant noise pollution in busy city areas.

I know the sound that some of the other cars on the market make that are more subtle are often difficult to determine where the sound is coming from or that it even comes from a car. I was glad that our 2020 Model Y and previous Teslas never had the noisemaker. Tesla included the spot for the external speaker on the first production Y's like ours, but didn't start including the actual speaker until later that year or into 2021 once it became law. Anyway, the Y is going away here real soon as we expect our (hopefully still tariff free) Mach-E delivery.
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