ISO 8201:2017 警報システム—可聴緊急避難信号—要件 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 3, Fire detection and alarm systems.

This second edition cancels and replaces the first edition (ISO 8201:1987), which has been technically revised.

The main changes compared to the previous edition are as follows:

• the evacuation signal temporal pattern has been modified to allow for the use of signals from voice alarm evacuation systems.

This corrected version of ISO 8201:2017 incorporates the following corrections:

• the title of the document has been corrected from Acoustics — Audible and other emergency evacuation signalstoAlarm systems — Audible emergency evacuation signal — Requirements.

Introduction

There has been a growing interest in the past decade in the development of an international audible signal which, when heard, would unequivocally mean “evacuate the building immediately”.

In searching for an appropriate audible signal, it was considered that levels of background noise and frequency patterns are so variable, particularly in the industry, that no signalling device would be able to “penetrate” all background noises and frequency patterns. For this reason, it seemed prudent to select the kind of sound best able to audibly “penetrate” a particular background noise in a given building and then make that sound unique and understandable by imposing on it a standard recognizable pattern of “on” and “off” times.

It is frequently found that, whatever sounding device is already in place in a building, it is there because it has been shown to be successful. Consequently, all that is needed in many cases is to impose a standardized temporal pattern on the existing sounding devices. For new buildings, a signal that can “penetrate” the background noise inside that building should be selected and then the standardized temporal pattern is imposed on that signal.

An additional advantage of using a standardized temporal pattern as the distinguishing characteristic of the audible emergency evacuation signal is that the temporal pattern can be applied to visual and tactile signals to aid those who have impaired hearing. Visual and tactile signals incorporating the temporal pattern can also be applied in areas where the background noise is so intense that no signal is capable of “penetrating” audibly.

This document is one of a series of standards covering danger signals. Other standards include ISO 7731, ISO 11428 and ISO 11429.

1 Scope

This document specifies the requirements for an audible emergency evacuation signal intended to indicate without ambiguity, to all persons within the reception area of the signal, that an emergency situation (fire, gas leaks, explosion, nuclear radiation, etc.) requires immediate evacuation.

Two acoustic parameters of the audible emergency evacuation signal are defined: the temporal pattern and the required sound pressure level at all places within the intended reception area of the signal.

The signal specified in this document is intended to be used in buildings, including but not limited to schools, hotels, residential buildings, public institutions and work places (such as factories and offices) The signal can also be used in outside areas.

This document is not applicable to warning signals, to signals for public disaster control or to alarm systems on board ships or in outdoor moving vehicles, such as police cars, fire engines and ambulances.

The individual signalling-system components of the signal are also out of the scope of this document.

2 Normative references

There are no normative references in this document.

3 Terms and definitions

No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography