Peter Kember (born 19 November 1965), also known by his stage name Sonic Boom, is an English singer and record producer. He was a founding member, vocalist, guitarist and keyboardist of alternative rock band Spacemen 3, lasting from 1982 until the band's dissolution in 1991. He is now based in Sintra, Portugal.
He provided the production on MGMT's sophomore album Congratulations, Panda Bear's albums Tomboy and Panda Bear Meets the Grim Reaper, and Beach House's album 7.
As a solo artist, Kember has recorded as Spectrum and E.A.R. (Experimental Audio Research), parallel musical projects with recordings under both names occasionally only featuring Kember. He has occasionally performed live under both monikers, most recently in 2008–11 as Spectrum, touring as a band in America and Europe. Kember has played and collaborated with a number of artists, including Stereolab and Yo La Tengo.