Guidelines for the application of the specified methods over an extended frequency range in respect to lower frequencies are given in an annex. ISO is not applicable to frequency ranges above the 10 Hz one-third-octave band. The methods specified in ISO are suitable for all types of noise steady, non-steady, fluctuating, isolated bursts of sound energy, etc.
The noise source under test can be a device, machine, component or sub-assembly. The test rooms that are applicable for measurements made in accordance with ISO are reverberation test rooms meeting specified requirements. Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with ISO , for measurements made in limited bands of frequency and for A-weighted frequency calculations from them.
The uncertainty conforms to ISO , accuracy grade 1 precision grade. Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national. A version in any other language made by translation. Annex ZA This European Standard shall be given the status of a national standard, either by publication of an identical.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent. Once this standard is cited in the Official Journal of the European Communities under that Directive and has.
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,. Annex A informative Guidelines for the design of reverberation test rooms Annex B informative Guidelines for the design of rotating diffusing vanes Annex E informative Extension of frequency range to frequencies below Hz ISO the International Organization for Standardization is a worldwide federation of national standards bodies.
ISO member bodies. Each member body interested in a subject for which a technical committee has been. International organizations, governmental and. ISO collaborates closely with the. The main task of technical committees is to prepare International Standards.
Draft International Standards. Publication as an. This fourth edition cancels and replaces the third edition ISO , which has been technically revised.
The selection of one of the methods from the series for use in a particular. General guidelines to assist in the selection are provided in ISO ISO It is important that test codes be established for individual kinds of. The methods given in this International Standard require the source under test to be mounted in a. The methods are then based on the.
For a source emitting sound in narrow bands of frequency or at discrete frequencies, a precise determination. The increased measurement effort in the case of a source emitting narrow bands of sound or discrete tones. The addition of. The methods specified in this International Standard permit the determination of the sound power level and. This International Standard describes methods of accuracy grade 1 precision grade as defined in ISO The resulting sound power levels and sound energy levels include corrections to allow for any differences that.
For applications in reverberant environments where reduced accuracy is. This International Standard specifies methods for determining the sound power level or sound energy level of. The sound power level. Measurement and calculation procedures. In general, the frequency range of interest includes the one-third-octave bands with mid-band frequencies. Guidelines for the application of the specified methods over an extended frequency. This International Standard is not applicable to. The methods specified in this International Standard are suitable for all types of noise steady, non-steady,.
This International. In such. The test rooms that are applicable for measurements made in accordance with this International Standard are. Information is given on the uncertainty of the sound power levels and sound energy levels determined in. A-weighted sum of all frequency bands. The uncertainty conforms to ISO , accuracy grade 1. The following referenced documents are indispensable for the application of this document.
For dated. For undated references, the latest edition of the referenced. ISO , Acoustics — Requirements for the performance and calibration of reference sound sources for the. IEC , Electroacoustics — Random-incidence and diffuse-field calibration of sound level meters. L denotes the A-weighted sound pressure level. NOTE For special purposes, the frequency range can be extended or reduced, provided that the test environment. The frequency range can be extended.
Any reduced or extended frequency range is clearly indicated as such in the report. NOTE Background noise includes contributions from airborne sound, noise from structure-borne vibration, and. NOTE 2 The background noise correction is frequency dependent; the correction in the case of a frequency band is. NOTE 2 The quantity relates to the rate per time at which airborne sound energy is radiated by a source.
Your shopping cart is empty! BACK Sep Abstract German French Slovenian Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for reverberation test rooms ISO ISO specifies methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured in a reverberation test room.
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A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April , and conflicting national standards shall be withdrawn at the latest by April Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
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Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with ISO , for measurements made in limited bands of frequency and with frequency A-weighting applied. The uncertainty conforms to ISO , accuracy grade 2 engineering grade.
Proof returned by secretariat 60 Publication Check out our FAQs. Buy this standard. Abstract Preview ISO specifies methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping the noise source machinery or equipment in an environment that approximates to an acoustic free field near one or more reflecting planes.
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