1.6M views · Jan 24, 2014 · 1:45 · 3 HN recommenders · 7 mentions · discussed 2016–2026
Tom Scott stands by a construction site and explains why reversing vehicles now use a white-noise hiss instead of beeping. The sound is easier to locate directionally and less annoying to neighbours.
Why Hacker News points people here: Cited whenever backup beepers and noise come up, as a clear explanation of the white-noise alternative.
“Tom Scott has a fascinating video that describes how this is changing”HN comment, 2021
“Tom Scott has a fascinating video that describes how this is changing”
Describes how backup beepers are being replaced
> Back up beepers are considerably louder than they need to be. Tom Scott has a fascinating video that describes how this is changing: this video
“studies show that there are safer (and less annoying) noises that can be utilized”
Explains safer, less annoying alternatives to reversing beepers
Not necessarily. It's being changed in some places because studies show that there are safer (and less annoying) noises that can be utilized: Tom Scott - Why Do Reversing Trucks Not Beep Any More? this video As someone with construction taking place next door to me I really wish they would start getting rid of the beeping in more places. I'm pessimistic that it will happen in my area anytime soon though.
“It has multiple benefits over the old beeping sound, including being easily able to hear the direction the sound is coming from.”
White noise reversing sounds have multiple benefits over beeping
It does remind me of a video from Tom Scott about the use of white noise for reversing trucks. It has multiple benefits over the old beeping sound, including being easily able to hear the direction the sound is coming from. this video
“What happened to the white noise beeper talked about in Tom Scott's video from 7 years ago”
White noise reversing alarm discussed years earlier
What happened to the white noise beeper talked about in Tom Scott's video from 7 years ago -- this video ?
“Tom Scott video for reference”
Background on white-noise reversing beepers
Improved reversal sounds have been invented - the classic beep isn't just bad from a noise pollution perspective, it's also an artificial sound that's difficult for people to process and determine its point of origin. There's been a gradual rollout of white-noise reversal beepers, which while they might seem strange are easier for people to locate aurally - as a result they can be played at a lower volume, and even if it was played just as loud is a much less unpleasant tone. Of course it'll probably be many years before old-school beepers are phased out. Tom Scott video for reference: this video
“there is an alternative which sounds more like a hiss”
Hiss alternative lets you locate sound direction
The beep isn't for the driver. I don't want it to beep after I step out behind it, I want it to beep before. Despite that, there is an alternative which sounds more like a hiss. The main benefit is that you can identify the direction from your hearing. I have to look in all directions to find where the beep is coming from. this video
“I wish the alternate-woop-and-ksssh had replaced the simple siren in more than just construction sites”
Alternate woop-and-ksssh sound used on construction sites
I wish the alternate-woop-and-ksssh had replaced the simple siren in more than just construction sites: link this video
