SAE ARP1279A-2023
Standard Indoor Method of Collection and Presentation of the Bare Turboshaft Engine Noise Data for Use in Helicopter Installations
- Standard No.
- SAE ARP1279A-2023
- Release Date
- 2023
- Published By
- Society of Automotive Engineers (SAE) US / SAE
- Latest
- SAE ARP1279A-2023
- Introduction
Analysis of the Standard's Core Content
SAE ARP1279A specifies methods for collecting and presenting noise data for turboshaft engines in indoor environments. It is primarily used for pre-installation noise assessment of helicopter propulsion systems. First published in 1972 and revised in 1985, the standard was designated "stabilized" in 2023.
Technology Evolution and Stability Analysis
Version Status Technical Features Applicable Scenarios 1972 Initial Edition Current Establishment of Basic Measurement Methods Early Turboshaft Engines 1985 Rev.A Non-current Add Data Presentation Specifications Second-generation Engines 2023 Stable Version Stabilization Basic Technology Solidification Traditional Model Maintenance
Key measurement requirements
The standard requires the use of 1/3 octave band to analyze the noise spectrum, and the measurement distance is specified as: 1 meter from the engine air intake. Typical measurement parameters include:
- Sound pressure level (dB)
- Frequency weighting characteristics
- Background noise correction value
Implementation recommendations
Although the standard has been stabilized, users should note that:
- New turboshaft engines may need to incorporate the latest noise control technologies
- Actual outdoor installation effects require site correction
- It is recommended to regularly validate the method against current standards such as ISO 3744
Limitations of the standard
This standard does not apply to:
- Engine systems with noise reduction devices
- Dynamic noise measurement in flight
- Electromagnetic compatibility (EMC) assessment
SAE ARP1279A-2023 history
- 2023 SAE ARP1279A-2023 Standard Indoor Method of Collection and Presentation of the Bare Turboshaft Engine Noise Data for Use in Helicopter Installations
- 1985 SAE ARP1279-1985 STANDARD INDOOR METHOD OF COLLECTION AND PRESENTATION OF THE BARE TURBOSHAFT ENGINE NOISE DATA FOR USE IN HELICOPTER INSTALLATIONS
- 1972 SAE ARP1279-1972 Standard Indoor Method of Collection and Presentation of the Bare Turboshaft Engine Noise Data for Use in Helicopter Installations
Standard and Specification
SAE ARP1279-1985 STANDARD INDOOR METHOD OF COLLECTION AND PRESENTATION OF THE BARE TURBOSHAFT ENGINE NOISE DATA FOR USE IN HELICOPTER INSTALLATIONS
SAE ARP1279A Standard Indoor Method of Collection and Presentation of the Bare Turboshaft Engine Noise Data for Use in Helicopter Installations
SAE ARP1279 Standard Indoor Method of Collection and Presentation of the Bare Turboshaft Engine Noise Data, for Use in Helicopter Installations
SAE ARP1279-1972 Standard Indoor Method of Collection and Presentation of the Bare Turboshaft Engine Noise Data for Use in Helicopter Installations
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SAE AIR4083A-2023 Helicopter Power Assurance