ISO-22234-2005.pdf
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1、 Reference number ISO 22234:2005(E) ISO 2005 INTERNATIONAL STANDARD ISO 22234 First edition 2005-11-15 Cinematography Relative and absolute sound pressure levels for motion-picture multi-channel sound systems Measurement methods and levels applicable to analog photographic film audio, digital photog
2、raphic film audio and D-cinema audio Cinmatographie Niveaux de pression sonore relatifs et absolus pour les systmes de films cinmatographiques sonores multicanaux Mthodes de mesure et niveaux applicables aux films sonores photographiques analogiques, aux films sonores photographiques numriques et la
3、udio de D-cinma Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 11:01:25 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 22234:2005(E) PDF disclaime
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6、le; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2005 All rights
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8、equester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with I
9、SO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 11:01:25 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 22234:2005(E) ISO 2005 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federati
10、on of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO 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
11、. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance w
12、ith the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires appr
13、oval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 22234 was prepared by Technical Commit
14、tee ISO/TC 36, Cinematography. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 11:01:25 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright Intern
15、ational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 11:01:25 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 22234:2005(E) ISO 2005 All rights re
16、served 1 Cinematography Relative and absolute sound pressure levels for motion-picture multi-channel sound systems Measurement methods and levels applicable to analog photographic film audio, digital photographic film audio and D-cinema audio 1 Scope This International Standard specifies the measure
17、ment methods and wide-band sound pressure levels for motion-picture control rooms, review rooms, and indoor theatres. Together with ISO 2969, it is intended to assist in standardization of reproduction of motion-picture sound in such rooms. 2 Normative references The following referenced documents a
18、re indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2969:1987, Cinematography B-chain electro-acoustic response of motion-picture con
19、trol rooms and indoor theatres Specifications and measurements IEC 60268-17:1990, Sound system equipment Part 17: Standard volume indicators IEC 61672-1:2002, Electroacoustics Sound level meters Part 1: Specifications 3 Terms and definitions For the purposes of this document, the following terms and
20、 definitions apply. 3.1 absolute sound pressure spatially averaged sound pressure level of a single channel of a theatrical sound system measured with broadband pink noise at the reference electrical level as a stimulus NOTE The 0 dB (reference) level for sound pressure is 20 N/m2. 3.2 average respo
21、nding meter meter which provides a voltage indication proportional to the average value of the rectified signal, with ballistics as described in IEC 60268-17 3.3 bass extension technique of taking low-frequency information from a film sound-track, processing it, and sending it to a sub-woofer, as op
22、posed to an LFE channel NOTE See A.3. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 11:01:25 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 22234
23、:2005(E) 2 ISO 2005 All rights reserved 3.4 B-chain final chain that part of a motion-picture sound reproduction system, as shown in Figure 1 for a typical film system, commencing at the input terminals of the main fader and terminating in the listening area defined in Figure 2 in which sound pressu
24、re level measurements are taken NOTE See A.7. 3.5 electroacoustic response B-chain spatially averaged frequency response measured in one-third octave bands as described in ISO 2969 NOTE The electroacoustic response is expressed in decibels. 3.6 LFE channel discrete low-frequency effects channel, nor
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