Historical
ANSI/ASA S3.41-1990 (R2008)
Audible Emergency Evacuation Signal
Conforms with International Standard for Audible Emergency Evacuation Signal , ISO 8201, which was approved by ISO and published in December 1987. This standard was developed in response to the growing interest in the development of an international audible signal which, when heard, would unequivocally mean "evacuate the building immediately."
Acoustical Society of America [asa]