Cochlear will not be buying the hearing aid business of Siemens. The German company has dropped its plan to sell the division after failing to get bids of more than $3 billion. One analyst blamed falling profits in the hearing-aid business for the lower bids. Last year's earnings for the Siemens' unit were down 5% from the previous year. For it's part, Cochlear expects a bump in profits of 15% this year, thanks to sales of its new implant, the Nucleas 5.