Intelligibility of sound reinforcement in large public spaces

Ten questions are posed and answered. 1. What is a large public space? 2. Are currently installed systems intelligible? 3. Why are multiple location loudspeakers not intelligible? 4. Are twin columns intelligible? 5. Can electrical delay devices help? 6. Can electrical equalization of frequency response improve intelligibility? 7. Can speech reinforcement be intelligible in a concert hall? 8. Can speech reinforcement be intelligible in a sporting arena? 9. Can pubs lic address systems be intelligible in airports? 10. Can sound reinforcement be intelligible in a church? The answers to questions 2, 4, 5, and 6 are negative. Questions 7, 8, and 10 can have positive answers.