1188 International Standard (ISO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAA OPIAHM3AUMA NO CTAHAAPTW3ALWWORGANISATION INTERNATIONALE DE NORMALISATION Cinematography Recorded characteristic for magnetic sound on full-coat 16 mm motion-picture film Specifications Cinematographie -- Caracteristique d'enregistrement sonore sur film cinematographique 16 mm magnetique, couche pleine largeur - Spécifications Second edition -- 1984-11-15 UDC 771.531.352 : 778.534.425 Ref.No.ISO 1188-1984 (E) )1188-1984 ( Descriptors :cinematography,motion-picture film,motion picture film 16 mm,magnetic recording,sound recording,characteristics. Price based on 1 page No reproduction or networking permited without license from IHS Not for Resale Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (iso member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Every 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. Draft International Standards adopted by the technicai committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at International Standard ISO 1188 was prepared by Technical Committee ISO/TC 36, Cinematography. ISO 1188 was first published in 1974. This second edition cancels and replaces the first edition, of which it constitutes a technical revision. InternationalOrganizationforStandardization,1984 Printed in Switzerland yhaoagzaSandardzan No reproduction or networking permitted without license from IHS Not for Resale ISO 1188-1984 (E) INTERNATIONALSTANDARD Cinematography Recorded characteristic for magnetic sound on full-coat 16 mm motion-picture film - Specifications 1 Scope and field of application Table--Numericalvaluesoftherecorded characteristics Frequency This International Standardspecifies therecorded dB Hz characteristic for magnetic sound records on 16 mm full-coat 40 0,13 perforated magnetic film when used at the nominal speed of 50 0,13 24 frames [18,3 cm (7.2 in)] per second, or 25 frames 63 0,13 [19,05 cm (7.5 in)] per second. 80 0,13 100 0,12 125 0,12 160 0,11 2 Recorded characteristic 200 0,10 250 0,08 315 0,05 With constant sine-wave signal applied to the input of the 400 0,00 recording system, the nominal characteristic in effective values 500 0,07 of the short-circuit magnetic flux versus frequency should fall 630 0,19 withincreasingfrequency inconformitywiththeimpedanceof 800 0,37 a parallel combination of a capacitance and a resistance having 1 000 0,64 a time constant t =70 μs. 1 250 1,01 1 600 1,61 2 000 2,36 The characteristic defined above is represented by 2 500 3,31 3 150 4,52 4 000 5,99 N=-10 lg(1+42f2t2) 5 000 7,53 6 300 9,25 8 000 where 11,13 10.000 12,95 12 500 14,81 N is the recorded characteristic in decibels; 16 000 16,90 NOTE -- Numerical values of the recorded characteristic normalized to f is the frequency in hertz; 400 Hz. 3 Tolerances tis the time constant in seconds. Magnetic sound records on films shall be recorded to the characteristic specified in clause 2 within the tolerances given in Numerical values are given in the table. the figure. + 2 0 dB 2 4 40 Hz 100 Hz 1kH 10 kH, 16 kH 12,5 kH Figure - Tolerances on recorded level on 16 mm film 1 No reproduction or networking permitted without license from IHS Not for Resale