American Family Insurance led the advanced microphone developer's latest round, which included Shure, Synaptics, Baidu, Bose and Amazon Alexa Fund.

US-based microphone technology developer Vesper has completed a $23m series B round led by American Family Ventures, the corporate venturing arm of insurance provider American Family Insurance.

The round featured e-commerce and cloud computing firm Amazon’s Alexa Fund, as well as microphone manufacturer Shure, computer interface developer Synaptics, internet group Baidu and Bose Ventures, the strategic investment subsidiary of audio product supplier Bose.

Accomplice, Hyperplane Venture Capital, ZZ Capital, Sands Capital Management and undisclosed additional investors filled out the round’s…