Whilst it has been argued that US President Donald Trump has been turning a deaf ear to Europe with regards to tariffs, in the case of hearing aids, it’s not true. Three of the world’s largest and longest established hearing aid manufacturers are based outside of Danish capital Copenhagen in an area known locally as the “Silicon Valley of Sound.” These companies, Demant, GN Store Nord and WS Audiology (as well as Swiss rival Sonova Holding) must have held their collective breaths as Trump announced the levy of tariffs for products imported into the USA but once again, they were...