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ISO 6798-1:2020 Reciprocating internal combustion engines - Measurement of sound power level using sound pressure - Part 1: Engineering method >
ISO 6798-1:2020 Reciprocating internal combustion engines - Measurement of sound power level using sound pressure - Part 1: Engineering method, 2020
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and symbols
- 3.1 Terms and definitions
- 3.2 Symbols
- 4 Test environment
- 4.1 General
- 4.2 Criterion for background noise
- 4.3 Criterion for acoustic adequacy of test environment
- 5 Instrumentation
- 5.1 General
- 5.2 Calibration
- 5.3 Application
- 6 Installation and operation conditions
- 6.1 General
- 6.2 Installation conditions
- 6.3 Engine conditions and operation conditions
- 6.3.1 Engine conditions
- 6.3.2 Operating conditions
- 7 Measurement
- 7.1 General
- 7.2 Measurement uncertainty
- 7.3 Reference box
- 7.4 Measurement distance
- 7.5 Measurement surface and area
- 7.6 Microphone positions
- 7.7 Criterion for position adequacy of microphones
- 7.7.1 General
- 7.7.2 Reduction of microphone positions
- 8 Calculation
- 8.1 General
- 8.2 Calculation of standard deviation of mean sound pressure levels
- 8.3 Calculation of sound power level
- 8.3.1 Measured surface time-averaged sound pressure levels
- 8.3.2 Corrections for background noise
- 8.3.3 Environmental correction
- 8.3.4 Surface time-averaged sound pressure level
- 8.3.5 Sound power level
- 9 Information to be recorded
- 10 Test report
- Annex A (normative) Qualification procedures for the acoustic environment
- Annex B (normative) Calculation of A-weighted sound power levels from frequency band levels
- Annex C (normative) Sound power level under reference meteorological conditions
- Bibliography [Go to Page]