Imagine a world without acoustics: The beauty of Bach’s sonatas would never have graced the ears of captive audiences through the past centuries, and the spectacular Lady Gaga would likely still be known simply as Stefani Germanotta — if her name was known at all. Without sound waves there would be no music — at least that has been the prevailing opinion thus far. But for around 500,000 people worldwide (EURO-CIU 2017), hearing is not bound to acoustics. These people wear a cochlear implant (CI), a hearing aid implanted in the inner ear of the auditory system which makes it…