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BS EN IEC 60263:2020

BS EN IEC 60263:2020

$102.76

Scales and sizes for plotting frequency characteristics and polar diagrams

Published By Publication Date Number of Pages
BSI 2020 18
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This document specifies standard aspect ratios for logarithmic or level characteristics expressed in decibels versus a logarithmic frequency axis and ranges for the radius of polar diagrams of level. Applications include hard copy printouts, electronic files (e.g., PDF files), scientific publications, screen displays in computer programs and apps, as well as graphs in standards.

Informative examples of graphs that conform to the requirements in this document are found in Annex A.

Although outside the scope of this document, graphs with a linear y-axis versus logarithmic frequency (e.g., phase, group delay, etc.) often accompany the standard aspect ratio graphs of level described in the normative part of this document. These are described in informative Annex B.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 European foreword
Endorsement notice
5 English
CONTENTS
6 FOREWORD
8 INTRODUCTION
9 1 Scope
2 Normative references
3 Terms and definitions
4 Characteristics plotted versus a logarithmic frequency scale
4.1 Decibel vs. log frequency plots
10 4.2 Log quantities vs. log frequency plots
5 Polar level diagrams
5.1 General
5.2 Polar plots of absolute level
5.3 Polar plots of relative level
11 Annex A (informative)Examples of the requirements specified in this document
Figures
Figure A.1 – Example of a microphone calibration curve showing the relative response in dB as a function of frequency with an aspect ratio of 10 dB/decade
12 Figure A.2 – Example of the response of a loudspeaker crossover filter network with an aspect ratio of 20 dB/decade
Figure A.3 – Example of the response of a loudspeaker with an aspect ratio of 25 dB/decade (dB re. 20 μPa)
13 Figure A.4 – Example of the response of a hearing aid with an aspect ratio of 50 dB/decade
Figure A.5 – Example of the noise from a mobile communications device with an aspect ratio of 0,5 decades/decade (10 dB/decade)
14 Figure A.6 – Example of amplifier noise with an aspect ratio of 1 decade/decade (20 dB/decade)
Figure A.7 – Example of total harmonic distortion of an earphone with an aspect ratio of 1,25 decades/decade (25 dB/decade)
15 Figure A.8 – Example of total harmonic distortion of a loudspeaker with an aspect ratio of 2,5 decades/decade (50 dB/decade)
Figure A.9 – Example of a polar diagram of absolute level with a range of 60 dB, showing the sound pressure level from a siren at a distance of 3 m
16 Figure A.10 – Example of a polar diagram of relative level with a range of 30 dB and a reference circle radius of 25 dB, showing the directional response of a highly directional shotgun microphone at 2,5 kHz
17 Annex B (informative)Information regarding linear y-axis vs. logarithmic frequency plots
B.1 General
B.2 Phase
B.3 Group delay

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BS EN IEC 60263:2020
$102.76