Recommendations of this Aerospace Recommended Practice (ARP) are not intended to satisfy the more detailed and stringent requirements of aircraft design development. Also, they may not be directly applicable to general or private aviation aircraft where special restraints on measurement locations and procedures may exist. However, many of the principles and standards discussed may apply to these aircraft. The recommended procedure for sound pressure level measurements in aircraft involves the recording of data on magnetic tape for subsequent processing and analysis after the flight. Sound level meter/octave-band analyzer measurements, because of inherent inaccuracies associated with manual data readings, are not as precise as those obtained from a tape-recorder/time integrating analyzer system and are, therefore, precluded from this recommended practice.
SAE ARP1323-1978 history
2012SAE ARP1323B-2012 Type Measurements of Aircraft Interior Sound Pressure Levels During Cruise
1990SAE ARP1323A-1990 Type Measurements of Airplane Interior Sound Pressure Levels During Cruise
1978SAE ARP1323-1978 TYPE MEASUREMENTS OF AIRCRAFT INTERIOR SOUND PRESSURE LEVELS IN CRUISE