Whirring Noise when put in Reverse Gear

The pedestrian alert/warning system?
The sound device is in front so it increases sound level when in reverse so people behind the car can hear it better.

 

for some reason, toyota's are inordinately loud. is the volume adjustable?

 

It’s more like the sound a bunch of Cicadas would make.

 

The beeping sound is only on the inside, to make you aware you are in Reverse. The outside sound has been likened to the drone of a space ship. It was not as loud in early Gen 4s, but made louder in later models, due to changes in the federal regulations.

 

when we are on our daily walk, a lot of cars pass us slowly enough the the pedestrian warning is on.
toyota seems to have the loudest, or perhaps it's the pitch, idk.
our new hycam is much more obnoxious than our new bolt.

 

The 2020 I have seems pretty quiet electrically. I almost always have a window open. I don’t hear the space ship sound at all.

 

You’ll only hear it below about 20 miles an hour or so. Also fairly sure you will not hear it if you are in HV mode as in engine is running.

 

I go slower than 20 a lot, and 99% is in ev mode, not auto ev or hv mode. I back up often and a long way. Go slowly up parking garage grades and a steep hill at 25 every day. No audio on. No space ship sound so far, maybe I got a lemon. I’ll focus on it more to make sure.

 

I listened more today and the signal is there when brake is released going forward and in reverse. Very quiet and steady sound, not that noticeable with window open, quiet area. Not a louder whoop whoop electrical type sound I hear other cars making, even going down the street. .
I find it a non issue on my car since I had to try quite hard to notice it.

 

you either need hearing aids, or got lucky with a defective unit.