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1 Scope 7 2 Normative references 7 3 Terms and definitions 8 3.1 General definitions 8 3.2 Acoustical definitions 9 3.3 Aerodynamic definitions 9 4 Limitations of measurement 11 5 Design and performance requirements for test plenum 11 5.1 General 11 5.2 Test plenum: main assembly 12 5.3 Mounting panel assembly 12 5.4 Adjustable exit port assembly 13 5.5 Insertion loss of test plenum 13 5.6 Instrumentation for static pressure measurement 13 6 Installation 14 6.1 Installation of test plenum in test room 14 6.2 Direction of airflow 14 6.3 Mounting of air-moving device 14 7 Operation of air-moving device 14 7.1 Input power 14 7.1.1 Alternating current (AC) air-moving devices 14 7.1.2 Direct current (DC) air-moving devices 15 7.2 Points of operation (AC and DC air-moving devices) 15 7.2.1 Required points of operation 15 7.2.2 Additional points of operation 15 7.2.3 Procedure 15 8 Measurement procedures 16 8.1 General 16 8.2 Microphone positions for measurements in an essentially free field over a reflecting plane 16 8.2.1 General 16 8.2.2 Fixed points on a hemisphere 17 8.2.3 Coaxial circular paths in five or more parallel planes 17 8.3 Preparations for measurements 17 8.4 Operational t

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Author

Garcia

Language

EN

Category

reference