Acoustics - Measurement of high-frequency noise emitted by computer and business equipment (ISO 9295:1988)

Specifies four methods for the determination of sound power levels in the frequency range between 11,2 kHz and 22,4 kHz with the centre frequency of 16 kHz. The first three methods are based on the reverberation room technique, the fourth on a free field over a reflecting plane.

Akustik - Messung von hochfrequentem Geräusch von Geräten der Büro- und Informationstechnik (ISO 9295:1988)

Acoustique - Mesurage du bruit à haute fréquence émis par les matériels informatique et de bureau (ISO 9295:1988)

La présente Norme internationale spécifie quatre méthodes pour la détermination des niveaux de puissance acoustique du bruit à haute fréquence émis par les matériels informatiques et de bureau dans le domaine de fréquences couvert par la bande d'octave centrée sur 16 kHz. Ces méthodes sont complémentaires aux méthodes décrites dans l'ISO 7779. Les trois premières méthodes reposent sur la technique en salle réverbérante décrite au chapitre 5 de l'ISO 7779 : 1988, tandis que la quatrième méthode fait appel à un champ libre au-dessus d'un plan réfléchissant décrit au chapitre 6 de l'ISO 7779 : 1988. Les conditions d'essai qui déterminent l'installation et le fonctionnement des matériels sont celles spécifiées dans l'ISO 7779. Les quatre méthodes spécifiées dans la présente Norme internationale s'appliquent particulièrement aux matériels informatiques et de bureau, mais peuvent convenir à d'autres types de matériel. La présente Norme internationale spécifie des méthodes pour la dét

Akustika - Merjenje visokofrekvenčnega hrupa računalnikov in pisarniške opreme (ISO 9295:1988)

General Information

Status
Withdrawn
Publication Date
08-Oct-1991
Withdrawal Date
19-May-2015
Technical Committee
Drafting Committee
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
20-May-2015

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EN 29295:1999
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Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Akustik - Messung von hochfrequentem Geräusch von Geräten der Büro- und Informationstechnik (ISO 9295:1988)Acoustique - Mesurage du bruit a haute fréquence émis par les matériels informatique et de bureau (ISO 9295:1988)Acoustics - Measurement of high-frequency noise emitted by computer and business equipment (ISO 9295:1988)35.020Informacijska tehnika in tehnologija na splošnoInformation technology (IT) in general17.140.20Emisija hrupa naprav in opremeNoise emitted by machines and equipmentICS:Ta slovenski standard je istoveten z:EN 29295:1991SIST EN 29295:1999en01-november-1999SIST EN 29295:1999SLOVENSKI
STANDARD



SIST EN 29295:1999



SIST EN 29295:1999



SIST EN 29295:1999



SIST EN 29295:1999



INTERNATIONAL STANDARD 9295 First edition 1988-1 l-15 Corrected and reprinted 1989-02-01 ~gf~~~ = 3 = ED = =uJid = L = = E = c ~~ INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXAYHAPOJJHAFI OPI-AHM3A~MR i-l0 CTAHfiAPTM3AuMM Acoustics - Measurement of high-frequency noise emitted by computer and business equipment Acoustique - Mesurage du bruit ;i haute frhquence hmis par les mathriek informatiques et , , I de bureau Reference number IS0 9295 : 1988 (E) SIST EN 29295:1999



IS0 9295 : 1988 (El Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. They are approved in accordance with IS0 procedures requiring at least 75 % approval by the member bodies voting. International Standard IS0 9295 was prepared by the European Computer Manufac- turers Association (as Standard ECMA-108) and was adopted, under a special “fast- track procedure”, by Technical Committee ISO/TC 43, Acoustics, in parallel with its approval by the IS0 member bodies. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. 0 International Organization for Standardization, 1988 l Printed in Switzerland SIST EN 29295:1999



INTERNATIONAL STANDARD IS0 9295: 1988 (E) Acoustics - Measurement of high-frequency noise emitted by computer and business equipment 0 Introduction Some computer and business equipment emits high-frequency noise which may be broad-band noise (e.g. paper noise of high- speed printing) or narrow-band noise and discrete tones (e.g. switching power supplies and video display units). The measured levels are not frequency-weighted. However, when there are significant contributions in the octave bands having centre frequencies between 125 Hz and 8 kHz, and, in addition, there is a contribution in the 16 kHz band which is broad-band in character, the A-weighted sound power level may be calculated with the contribution of the 16 kHz octave band in- cluded. The principal objective of this International Standard is to prescribe methods for measuring the levels and frequencies of tones which are contained within the 16 kHz octave band. 1 Scope and field of application This International Standard specifies four methods for the determination of the sound power levels of high-frequency noise emitted by computer and business equipment in the frequency range covered by the octave band centred at 16 kHz. They are complementary to the methods described in IS0 7779. The first three methods are based on the reverberation room technique described in clause 5 of IS0 7779 : 1988. The fourth method makes use of a free field over a reflecting plane as described in clause 6 of IS0 7779 : 1988. The test conditions which prescribe the installation and opera- tion of the equipment are those specified in IS0 7779. While the four methods described in this International Standard are particularly suitable for computer and business equipment, they may also be applied to other types of equipment. This International Standard specifies methods for the determination of sound power levels in the frequency range covered by the octave band centred at 16 kHz which includes frequencies be- tween II,2 kHz and 22,4 kHz. NOTE - The sound power level in the 16 kHz octave band determined according to this Interna
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