 SAN JOSE, Calif.--BUSINESS WIRE--Summit Wireless Technologies, Inc. Nasdaq: WISA, a leading provider of immersive, wireless sound technology for intelligent devices and next-generation home entertainment systems, is set to join Russell Microcap Index when Russell reconstitutes its comprehensive set of U.S. and global equity indexes on June 25. Membership in the Russell Microcap Index, which remains in place for one year, means automatic inclusion in the appropriate growth and value style 