ChinaAutoRegs｜GB/T 20787-2023英文版翻译《往复式内燃机 结构噪声测量方法》

Reciprocating Internal Combustion Engines—Measurement Method for Structure-Borne Noise

Foreword

Introduction

1 Scope

2 Normative References

3 Terms and Definitions

4 Measurement Environment

5 Measuring Instruments

6 Installation and Operation Conditions

7 Acceleration Measurement

8 Calculation

9 Information to be Recorded

10 Report

Annex A (Normative) Other connections between the engine and the test surroundings

Annex B (Normative) Corrections to the height of sensor contact plane

Annex C (Normative) Determination of the test frequency range

Annex D (Informative) Measurement Record

Bibliography 17

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