Course 140 – Speech Intelligibility for Public Address Systems
“Theory, design, and measurement”
General and emergency announcements don’t get a second chance. Clear and coherent speech is paramount. When speech intelligibility is required, there are rules that cannot be violated.
Information preservation is the most important requirement for a public address system, and the most difficult to achieve.
This course presents the fundamentals of designing intelligible sound systems. It examines how the information contained in an audio signal can be preserved en route to the listener.
There is a big difference between “audible” and “intelligible.” Audibility can be improved with a volume control. Speech intelligibility requires the establishment of some minimum ratios between early energy, late energy, and the noise in the environment. Watch the video to learn more.