We are surrounded by an invisible killer. One so common that we barely notice it shortening our lives.

It's causing heart attacks, type 2 diabetes and studies now even link it to dementia.

What do you think it could be?

The answer is noise - and its impact on the human body goes far beyond damaging hearing.

"It is a public health crisis, we've got huge numbers of people exposed in their everyday life," says Prof Charlotte Clark, from St George's, University of London.

It's just a crisis we don't talk about.

So I've been investigating when noise becomes dangerous, chatting to the people whose health is suffering and seeing if there's any way of overcoming our noisy world.

I started by meeting Prof Clark in an eerily silent sound laboratory. We're going to see how my body reacts to noise and I've been kitted out with a device that looks like a chunky smartwatch.

It's going to measure my heart rate and how much my skin sweats.

You can join in too if you have some headphones. Think about how these five sounds make you feel.

The one I find really grating is the traffic noise from Dhaka, Bangladesh, which has the title of the noisiest city in the world. I immediately feel like I'm in a ginormous, stressful traffic jam.

And the sensors are picking up my agitation - my heart rate shoots up and my skin is sweating more.