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This scientist is stopping sound.
This new technology makes windows quiet.
It is good for people in big cities.
It is similar to some headphones.
There are 24 speakers around the window.
Sound from outside can’t enter the room.
The speakers make a special sound.
This stops 10 decibels of the sound from outside.
But air and light can come in.
We can’t stop all sound, says Professor Gan Woon Seng.
The World Health Organisation says too much sound is bad.
Heart problems have links to sound.
It is bad for hearing problems too.
These special windows could be good for people’s health.
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