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International standard norme internationale 11

This is a preview - click here to buy the full publication INTERNATIONAL STANDARD IEC - Edition - NORME INTERNATIONALE Electroacoustics ?? Sound level meters ?? Part Periodic tests Electroacoustique ?? Sonomètres ?? Partie Essais périodiques INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS PRICE CODE CODE PRIX R ISBN - - - - Warning Make sure that you obtained this publication from an authorized distributor Attention Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale CThis is a preview - click here to buy the full publication ?? ?? - ? IEC CONTENTS FOREW ORD Scope Normative references Submission for testing Conformance Preliminary inspection Power supply Environmental conditions General test requirements Sound calibrator General Information for operation Information for testing Calibration of the sound calibrator Indication at the calibration check frequency Self-generated noise Microphone installed Microphone replaced by the electrical input-signal device Acoustical signal tests of a frequency weighting Electrical signal tests of frequency weightings Frequency and time weightings at kHz Long-term stability Level linearity on the reference level range Level linearity including the level range control Toneburst response C- weighted peak sound level Overload indication High-level stability Documentation C - ? IEC This is a preview - click here to buy the full publication ?? ?? INTERNATIONAL ELECTROTECHNICAL COMMISSION ELECTROACOUSTICS ?? SOUND LEVEL METERS ?? Part Periodic tests FOREWORD The International Electrotechnical Commission IEC is a worldwide organization for standardization comprising all national electrotechnical committees IEC National Committees The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic ?elds To this end and in addition to other activities IEC publishes International Standards Technical Speci ?cations Technical Reports Publicly Available Speci ?cations PAS and Guides hereafter referred to as ??IEC Publication s ? Their preparation is entrusted to technical committees any IEC National Committee interested in the subject dealt with may participate in this preparatory work International governmental and nongovernmental organizations liaising with the IEC also participate in this preparation IEC collaborates closely with the International Organization for Standardization ISO in accordance with conditions determined by agreement between the two organizations The formal decisions or agreements of IEC on technical matters express as nearly as possible an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense While all reasonable e ?orts are made to ensure that the technical content of IEC Publications is accurate IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user In order to promote international uniformity IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications Any divergence between any IEC Publication and the corresponding national or