PORTABLE INSTRUMENT PACKAGE (PORTAPAK) FOR THE MEASUREMENT OF NOISE AND VIBRATION,

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Abstract:

A portable, self-contained, instrument package PORTAPAK for recording noise and vibration environmental data in and around aircraft was developed. It was especially designed for use in field surveys where conditions limit the use of large and heavier recording equipment. The battery-operated recording system consists of a tape recorder and associated circuitry, a condenser microphone and a linear servo accelerometer as the vibration transducer. It weighs only 30 pounds and the overall dimensions are 17 inches wide, 14 12 inches deep and 5 12 inches high. Noise levels from 54 to 150 db SPL in the frequency range from 20 to 16,000 Hz and acceleration levels from 0.3 to 5 G in the frequency range from dc to 30 Hz can be measured. A complete description of the system is included and its performance characteristics for both the acoustical and vibration recording section are given. Author

Author(s):
Hille, Harald K. ; Rose, J. F., Jr. ; Kettler, L. Keith
Author Organization(s):
AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OHIO
Pagination:
0026

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AMRL-TR-69-75
Task Number(s):
723104
Project Number(s):
AF-7231
 Subject Terms
Communities of Interest:
Air Platforms
Descriptor(s):
(*RECORDING SYSTEMS, *AIRCRAFT NOISE), PORTABLE EQUIPMENT, VIBRATION
Field(s)/Group(s):
Recording and Playback Devices, Acoustics
Report Date:
1970 Mar 01