Humans have used frequency and patterned sound to change how they feel for thousands of years – generating calm, ecstasy and even a little bit of enlightenment. From drums around fires and chanting in stone chambers, to rattles and flutes in ceremonies of healing and initiation. Now we’ve taken these ancient ideas and used them in a new kind of transcendental technology, a jacket loaded with 180 speakers that fire frequency directly into your body. Evenly distributed across the jacket's body, arms and hood, each speaker is just 32mm in diameter and 10mm deep, mounted in laser cut holes and able to generate frequencies from 4 Hz to 20,000 Hz. All fire inward towards the body rather than out into the room. So you don't listen to this jacket. You feel it. Maybe you’ll orgasm. Maybe you’ll shit yourself. Maybe you’ll find God… so maybe you’ll want to be careful where you wear it. To build it we went to FBFX, the London-based special effects studio that has spent 30 years engineering costumes for film and television. Their credits include Gladiator, Prometheus, The Martian, Dune and Project Hail Mary. And they brought the same precision that goes into functional spacesuits for Matt Damon and Ryan Gosling to the problem of turning a jacket into a distributed speaker system. The jacket has a number of different ways to control your frequency feed. A control unit includes an MP3 player delivering 10 pre-set frequencies while a large physical dial lets you explore and fine-tune the frequencies that really make you feel good. The unit is also fitted with a reader for Micro SD cards which can hold up to 1,000 pre-set frequencies so you can create your personalised library. We are also working on a Sonic Jacket app that will connect to the control unit via Bluetooth. The jacket’s design is deliberately raw and functional. We’ve left the yellow wiring visible, the engineering exposed. "It's made to look like a science experiment because that's what it is," says FBFX co-founder Grant Pearmain. "We're not hiding the wires. Far from it." At the lowest frequencies, speakers can overheat. To get over this, the jacket will exploit one of the strange ways we experience frequency. If we are ‘played’ two slightly different frequencies, say 100 Hz and 104 Hz, we hear or feel the difference between the two – which is 4 Hz in this case. That’s how the jacket produces ultra-low frequencies without doing something less fun… like catching fire. The Sonic Jacket is not a one-off experiment. The science of frequency and consciousness is still being written. And this jacket will play a part in writing it. Portable, personalised, immersive sound therapy will become an essential tool when we want to feel more, or less, human. As a wearable resonance chamber, engineered to shift the wearer's cognitive and physiological state through sound, it marks the start of a new era in wearable technology. Below you'll find the journey of the Sonic Jacket from conception to completion.