The world's largest maker of cochlear implants says net profits rose 16% in the first half of the 2010/11 financial year. Cochlear LTD of Australia reported profits of $87.23 million, compared with $75.25 million in the same period the year before. The increased revenue is attributed to improved implant sales, which shot up 20%. Cochlear is also declaring an interim dividend of $1.05 per share.