The visor on Dyson's latest air-purifying headphones channels a continuous stream of purified air to your nose and mouth, without touching your face.
There were no established ways of measuring what we were trying to measure. So Dyson engineers made an imitation human head with imitation human lungs to map the behaviour of clean air accurately. So they knew when used in real life, it would work as intended.
Watch the ‘How the Dyson-engineered contact-free visor works’ video by selecting the corresponding link.
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