ISO 13475-1:1999 PDF

Acoustics — Stationary audible warning devices used outdoors — Part 1: Field measurements for determination of sound emission quantities

Название (английский):

ISO 13475-1:1999

Acoustics — Stationary audible warning devices used outdoors — Part 1: Field measurements for determination of sound emission quantities

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 19
Дата публикации:: 4 ноября 1999 г.
Издание:: ISO IS 13475 edition 1 version 1
ICS:: 13.320

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Описание (английский):

This part of ISO 13475 specifies the test conditions by which the sound emission level of stationary audible warning devices can be obtained. The methods are applicable to sirens for use in public outdoor warning systems and sound signalling devices for use outdoors. The purpose of this test code is to be able to produce reliable sound emission level measurements for stationary sirens used for warning outdoors. This part of ISO 13475 does not cover spoken messages and contains no recommendations for specific warning signals.

Технические детали

Технический комитет: ISO/TC 43/SC 1 - Noise
SKU: ISO 13475-1:1999

Abstract

Overview

ISO 13475-1:1999 - "Acoustics - Stationary audible warning devices used outdoors - Part 1: Field measurements for determination of sound emission quantities" defines field test methods to determine the sound emission of stationary outdoor warning devices (sirens and sound signalling devices). The standard specifies test site conditions, instrumentation, microphone placement, measurement procedures and reporting so that reliable, reproducible sound pressure and immission-relevant sound power values can be obtained for outdoor warning systems. It does not cover spoken messages or recommend specific warning signals.

Key topics and technical requirements

Measurement methods: Two field methods are described
- Flat-plate method - microphone mounted on a metal plate on the ground; measured level is reduced by 6 dB to account for the controlled reflection.
- Horizontal method - microphone mounted at the same elevation as the device (preferred centre height 10 m); measurements account for direct and reflected paths.
Reference distances and geometry: Preferred microphone distance is 30 m (maximum 50 m). Microphone positions and small sphere scans are defined for repeatability.
Test site & mounting: Ground between source and microphone must be flat to within –1.0 m; no major reflecting objects within twice the measurement distance; mount device at manufacturer’s recommended height (10 m recommended).
Instrumentation & calibration: Use class 1 or 2 sound level meters and octave filters per IEC 60651 / IEC 60804 / IEC 61260. Microphone diameter ≤ 13 mm for flat‑plate tests. Calibrators per IEC 60942; calibration traceable to national standards (calibrator interval ~12 months, other equipment ~24 months).
Ambient conditions & exclusions: Record temperature, humidity, barometric pressure, wind (preferably

Overview

Key topics and technical requirements

Measurement methods: Two field methods are described
- Flat-plate method - microphone mounted on a metal plate on the ground; measured level is reduced by 6 dB to account for the controlled reflection.
- Horizontal method - microphone mounted at the same elevation as the device (preferred centre height 10 m); measurements account for direct and reflected paths.
Reference distances and geometry: Preferred microphone distance is 30 m (maximum 50 m). Microphone positions and small sphere scans are defined for repeatability.
Test site & mounting: Ground between source and microphone must be flat to within –1.0 m; no major reflecting objects within twice the measurement distance; mount device at manufacturer’s recommended height (10 m recommended).
Instrumentation & calibration: Use class 1 or 2 sound level meters and octave filters per IEC 60651 / IEC 60804 / IEC 61260. Microphone diameter ≤ 13 mm for flat‑plate tests. Calibrators per IEC 60942; calibration traceable to national standards (calibrator interval ~12 months, other equipment ~24 months).
Ambient conditions & exclusions: Record temperature, humidity, barometric pressure, wind (preferably

ISO 13475-1:1999 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

Key topics and technical requirements

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