"Together, we proved that a human in freefall can break the speed of sound returning from near space, going through a transonic phase and landing safely on the ground, " said Dr Jonathan Clark, a former space shuttle flight surgeon and the Red Bull Stratos medical director.

BBC: Skydiver Felix Baumgartner fell faster than first thought

And as we walked, she used sound to draw a picture of the space around her.

CNN: 'On Looking': The world you're not seeing

As soon as the brain gets confusing signals from the two ears it stops using stereo separation as a way of distinguishing sound in space.

FORBES: Google Glass V2 Could Be Binocular, And Even Double As Stealth Hearing Aids

Through the tap of her cane, which, like an echolocating bat, sends a small sound out into the world, she could detect the size and constituents of the space through which she was walking.

CNN: 'On Looking': The world you're not seeing

The innovative architecture of SoundSphere speaker technology means it provides music-lovers with a surprisingly high-quality, authentic listening experience, filling your space with the true sound of the artist's original.

ENGADGET: Philips breathes new life into home stereos with SoundSphere

Once you enter the dark space where a dramatic spotlight shines on a 100sqm patch of falling water, the sound of the shower and the feeling of moisture in the air immediately gives the familiar impression of being caught in a downpour.

BBC: It is raining indoors in London