UL 2572 CRD-2014 质量通知系统的UL安全标准. 节/段落参考: 第75节/第76节主题: 大功率扬声器阵列的性能测试 (第一版: 2011年10月7日)
UL Standard for Safety Mass Notification Systems - Section/Paragraph Reference: Sections 75 and 76 Subject: Performance tests for High Power Speaker Arrays (Edition 1: October 07@ 2011)