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BS ISO 5128:2023

BS ISO 5128:2023

$167.15

Acoustics. Measurement of interior vehicle noise

Published By Publication Date Number of Pages
BSI 2023 42
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PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
10 3 Terms and definitions
12 4 Tables of symbols and abbreviated terms
14 5 Test equipment
5.1 Instrumentation for acoustic measurement
5.1.1 General
5.1.2 Calibration
5.1.3 Conformity with requirements
15 5.2 Instrumentation for vehicle speed and rotational engine speed measurements
5.2.1 Vehicle speed
5.2.2 Rotational engine speed (if applicable)
5.3 Meteorological instrumentation
5.3.1 General
6 Test facility
6.1 Outdoor test site
16 6.1.1 Test track surface properties
6.2 Meteorological conditions
6.2.1 General
6.2.2 Air temperature
6.2.3 Wind
6.2.4 Humidity
6.3 Background noise
7 Vehicle conditions
7.1 General
17 7.2 Battery state of charge
7.2.1 Active sound systems
7.3 Multi-mode operation
7.4 Tyre conditions
18 7.5 Loading of the vehicle
19 7.6 Openings, windows and auxiliaries
7.7 Seat adjustment
7.8 Squeak and Rattle (test equipment)
8 Test procedure
8.1 Microphone positions
8.1.1 General
20 8.1.2 Single microphone
8.1.3 Related to seats
8.1.4 Related to standing locations
21 8.1.5 Related to sleeping-berths
8.2 Test cycles
8.3 Vehicle operating conditions
8.3.1 General
8.3.2 Acceleration and deceleration tests
23 8.3.3 Steady speed test
8.3.4 Standstill condition
24 8.4 Measurement readings and data processing
8.4.1 General
8.4.2 Measurement readings for measurements in motion
25 8.4.3 Measurement readings and data processing for the standstill condition
8.5 Cycle related calculations
8.5.1 Cycle specific representative sound pressure levels
26 8.5.2 Cycle combines representative sound pressure levels
8.5.3 Exposure normalization
27 8.6 Final result
8.7 Test report
28 9 Measurement uncertainty
30 Annex A (normative) Specification on test track properties and performances
32 Annex B (informative)
34 Annex C (informative) Considerations on the precision of this standard
40 Bibliography

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BS ISO 5128:2023
$167.15