Excerpt: Right now, the recordings are considered an open record under Wisconsin’s open government laws. Media outlets often obtain them and play them on the air or online in high-profile crimes.
STATUS OF WiSCONSIN ASSEMBLY BILL 612
An Act to create 256.35 (9m) of the statutes; relating to: access to audio recordings of 911 calls.
12-11. A. Introduced by Representatives Vruwink, Sinicki, Zepnick and Bies; cosponsored by Senator Taylor.
12-11. A. Read first time and referred to committee on Personal Privacy
The Alabama House just passed a similar bill.
Retiring Guy found a mid-2009 reference that two dozens states have already passed legislation that prohibits or limits public broadcast of 911 audio. (Note to follow up when time permits.)
Link to August 13, 2009, Health Informatics blogpost, "911 calls: public or private?"