Yes, all committee hearings are open to the public, including conference committee hearings. Use the Combined Legislative Meeting Calendar to find hearing times and locations.
Many hearings are live-streamed (some audio and some video) online or broadcast live on television. Recordings are also available online. Access live and recorded meetings on the Legislature's Multimedia page. For access to older recordings, consult the Library's page of House and Senate Media Files, 1991-present.