Microsoft this week announced it will acquire Nuance, a Boston-based speech recognition and artificial intelligence company, for around $16 billion. It’s the company’s largest acquisition after LinkedIn and a big bet on speech recognition technology. Nuance is used most in health care, and about 10,000 health care facilities worldwide use it to capture conversations between patients and doctors and transcribe them in real time. Molly speaks with Daniel Hong, a research director at Forrester. He said that a controlled environment like a clinic or doctor’s office can make the tech more accurate.