ISO/TS 13475-2:2000 PDF
Acoustics — Stationary audible warning devices used outdoors — Part 2: Precision methods for determination of sound emission quantities
Acoustics — Stationary audible warning devices used outdoors — Part 2: Precision methods for determination of sound emission quantities
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 22
- Дата публикации:
- 2 ноября 2000 г.
- Издание:
- ISO TS 13475 edition 1 version 1
- ICS:
- 13.320
This part of ISO 13475 specifies the test conditions under which the acoustic emission levels of stationary audible warning devices may be obtained. It is applicable to sirens for use in outdoor public 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 to be used outdoors. This part of ISO 13475 does not cover spoken messages and contains no recommendations for specific warning signals.
Abstract
Overview
ISO/TS 13475-2:2000 - Acoustics - Stationary audible warning devices used outdoors - Part 2: Precision methods for determination of sound emission quantities - defines precision laboratory and controlled-field methods to measure the sound emissions of stationary outdoor sirens and sound signalling devices. It is intended to produce reliable, reproducible sound emission data for type testing, acceptance testing and for use in the design and specification of outdoor public warning systems. This technical specification excludes spoken messages and does not prescribe specific warning signals.
Key topics and technical requirements
- Measurement methods: Two precision methods are specified
- Free-field method (anechoic chamber or outdoor at large height) for minimal reflections.
- Free field over a reflecting plane (flat-plate) method (semi-anechoic room or outdoor with hard flat surface).
- Test site and setup:
- Test-site qualification procedures and a defined measurement line are required.
- Microphone positions and mounting rules are specified; windshields must be used for outdoor microphones.
- Maximum microphone distance from the siren: 50 m.
- Flat-plate surfaces must have an absorption coefficient
Технические детали
- Технический комитет
- ISO/TC 43/SC 1 - Noise
- SKU
- ISO/TS 13475-2:2000
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