Fire alarm consultants and system specifiers want an easy life. It's too easy to stipulate a certain standard when all it means to the specifier is a BS standards number on the page. It is only when a fire system design company comes to cost a job to this requirement that the real cost of careless specifications come to light. This is our experience when it comes to the specification of voice alarm systems. It has become too easy for specifiers to use British Standard BS 5839 Part 8 (Voice Evacuation Systems) as a catch-all standard the moment it has been decided that voice evacuation is a necessity. In fact, specifying voice sounders for use in a voice evacuation system designed under the auspices of BS 5839 Part 1 can in many instances satisfy the key features of a Part 8 system, without the cost or complex design process associated with full-blown VA systems.
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机译：火灾警报顾问和系统说明员希望生活轻松。当对说明者而言，这仅意味着页面上的BS标准编号时，规定一个特定的标准太容易了。只有当消防系统设计公司为此工作付出代价时，粗心规范的实际成本才被发现。这是我们在语音报警系统规范方面的经验。在确定语音疏散是必要的一刻，对于指定人员而言，使用英国标准BS 5839第8部分（语音疏散系统）作为一种通用标准变得太容易了。实际上，指定在BS 5839 Part 1主持下设计的语音疏散系统中使用的发声器可以在许多情况下满足Part 8系统的关键特征，而无需花费成本或使用成熟的VA系统的复杂设计过程。
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