When you are sending emergency communications, outdoor open areas are best served by voice notification. Pre-recorded messages often fall short of providing people with specific information. Likewise, an unrehearsed live voice is onerous and can be challenging and stressful in a crisis situation. Customers have found that when using live public address systems, communication often comes across unintelligible when amplified due to several factors including accents, voice inflections, fast or slow cadence, or improper enunciation.