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BSI PD IEC TR 61094-10:2022:2023 Edition

BSI PD IEC TR 61094-10:2022:2023 Edition

$142.49

Electroacoustics. Measurement microphones – Absolute pressure calibration of microphones at low frequencies using calculable pistonphones

Published By Publication Date Number of Pages
BSI 2023 24
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
6 FOREWORD
8 1 Scope
2 Normative references
3 Terms and definitions
9 4 Reference environmental conditions
5 Principles of absolute pressure calibration of microphones using a calculable pistonphone
5.1 General principle
5.2 Basic expressions
10 Figures
Figure 1 – Equivalent circuit for evaluating the sound pressure overthe exposed surface of the diaphragm of the microphone
11 5.3 Heat conduction correction
5.4 Operating frequency range
6 General characteristics
6.1 The pistonphone
12 6.2 Measuring the piston volume velocity
6.3 Test signals
6.4 Mounting the microphone and pressure-equalizing tube
6.5 Measuring the output voltages of the microphones
7 Factors influencing the pressure sensitivity
7.1 General
13 7.2 Polarizing voltage
7.3 Shield configuration
7.4 Dependence on environmental conditions
7.4.1 General
7.4.2 Static pressure
7.4.3 Temperature
14 7.4.4 Humidity
7.5 Vibration
7.6 Distortion
8 Calibration uncertainty components
8.1 General
8.2 Measurements of microphone output voltage
8.3 Piston
8.3.1 Frequency
8.3.2 Measurement of the volume velocity
15 8.4 Acoustic transfer impedance
8.4.1 Cavity properties
8.4.2 Physical quantities
8.5 Microphone parameters
8.5.1 Front cavity
8.5.2 Acoustic impedance
16 8.5.3 Polarizing voltage
8.6 Uncertainty on pressure sensitivity level
Table 1 – Uncertainty components
18 Annex A (informative)Example designs of pistonphones using laser interferometry
Figure A.1 – Schematic cross-section of a laser pistonphone
19 Figure A.2 – Example of laser pistonphone
Figure A.3 – Example of laser pistonphone
20 Annex B (informative)Measurement uncertainties
B.1 General
B.2 Example of a typical uncertainty analysis
B.2.1 General
B.2.2 Uncertainty budget
21 B.2.3 Combined and expanded uncertainties
Table B.1 – Example of uncertainty budget at 1 Hz
22 Bibliography

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BSI PD IEC TR 61094-10:2022
$142.49