stackyFACTS
Transport

Why do modern electric vehicles secretly broadcast a fake humming sound from hidden external speakers?

HERE’S THE INTERESTING PART

Why do modern electric vehicles secretly broadcast a fake humming sound from hidden external speakers?

From the Stacky collection1 min read
Why do modern electric vehicles secretly broadcast a fake humming sound from hidden external speakers?
STACKY / Transport
Topics in this factelectricvehiclessafety
One discovery leads to another.

Keep exploring facts in this topic.

Transport →
STACKY FOR IPHONE

A bigger world.
One discovery
at a time.

Keep discovering with Stacky. Interesting facts in an app that is always within reach.

Download on the App Store
ONE MORE DISCOVERY?

Keep exploring

All in this topic →
Airlines intentionally print safety cards and emergency exit instructions with brightly colored, cartoonish illustrations to prevent passengers from having massive panic attacks.
Transport

Airlines intentionally print safety cards and emergency exit instructions with brightly colored, cartoonish illustrations to prevent passengers from having massive panic attacks.

Airlines intentionally print safety cards and emergency exit instructions with brightly colored, cartoonish illustrations to prevent passengers from having…

Discover more
Airlines always dim the cabin lights during a night takeoff, but it has nothing to do with power. Why do they do it?
Transport

Airlines always dim the cabin lights during a night takeoff, but it has nothing to do with power. Why do they do it?

Airlines always dim the cabin lights during a night takeoff, but it has nothing to do with power. Why do they do it?

Discover more
What incredibly simple, chaotic change completely eliminated severe car crashes on a notoriously dangerous Dutch intersection?
Transport

What incredibly simple, chaotic change completely eliminated severe car crashes on a notoriously dangerous Dutch intersection?

What incredibly simple, chaotic change completely eliminated severe car crashes on a notoriously dangerous Dutch intersection?

Discover more
Seat cushions serve as actual flotation devices
Transport

Seat cushions serve as actual flotation devices

That uncomfortable block of foam you sit on for six hours has a secondary purpose. You can legally rip it off the velcro and hug it tightly to stay afloat if…

Discover more
Why is an airplane’s critical black box always installed in the absolute worst possible spot for daily maintenance?
Transport

Why is an airplane’s critical black box always installed in the absolute worst possible spot for daily maintenance?

Why is an airplane’s critical black box always installed in the absolute worst possible spot for daily maintenance?

Discover more
Nylon brushes lining the sides of modern escalators are specifically installed as safety devices to keep passengers' loose clothing, shoelaces, and bags from getting sucked into the machinery.
Transport

Nylon brushes lining the sides of modern escalators are specifically installed as safety devices to keep passengers' loose clothing, shoelaces, and bags from getting sucked into the machinery.

Nylon brushes lining the sides of modern escalators are specifically installed as safety devices to keep passengers' loose clothing, shoelaces, and bags from…

Discover more
StackyMore discoveries in the app
Download on the App Store