Peter Kember (born 19 November 1965) is an English musician and producer, more usually known as Sonic Boom, and was a founding member of alternative rock band Spacemen 3.

Since the disbandment of Spacemen 3 in 1991, Kember has recorded as Spectrum and E.A.R. (Experimental Audio Research) – the two projects have existed in parallel, and recordings under both names occasionally only feature 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.

Kember has also collaborated with other artists as a producer. He performed production duties on MGMT's 2010 album Congratulations and Panda Bear's albums Tomboy and Panda Bear Meets the Grim Reaper.