IEEE 85-1973

IEEE 85-1973 is a technical standard for airborne sound measurements on rotating electric machinery, providing a structured test procedure for evaluating acoustic output in power and industrial equipment. It helps define how sound measurements should be made so results are comparable, repeatable, and useful for engineering review. In this context, IEEE 85-1973 is relevant wherever rotating machines must be assessed for noise performance, documentation, or compliance-related testing in power, energy, and industrial applications.

IEEE 85-1973 overview

This standard focuses on a test procedure for measuring airborne sound from rotating electric machinery, which commonly includes motors, generators, and related rotating equipment. IEEE 85-1973 is intended to support consistent acoustic testing by describing how sound measurements are taken and interpreted in a technical setting. For users working with machine design, acceptance testing, or product documentation, it provides a defined reference point for handling sound data in a controlled and repeatable way.

Typical use cases

IEEE 85-1973 is typically used when evaluating the airborne noise characteristics of rotating electrical machines during development, factory testing, or equipment acceptance checks. It can support work on industrial motors, generator sets, and other rotating apparatus used in power and energy systems. Engineers, test labs, and procurement teams may rely on the standard when comparing equipment performance, documenting acoustic results, or confirming that measurement methods are consistent across different machines and test environments.

Why this standard matters

Sound measurements can vary significantly if test methods are not controlled, so IEEE 85-1973 helps reduce ambiguity in how results are obtained. That matters for design verification, performance comparison, and procurement decisions involving rotating machinery. Using a defined procedure can improve consistency across tests, support clearer reporting, and reduce the risk of disputes caused by uneven measurement practices. For organizations managing equipment noise, the standard offers a practical basis for more reliable technical evaluation.

• Airborne sound test procedure
• Rotating electric machinery
• Noise measurement consistency
• Engineering and acceptance testing
• Power and industrial equipment