Portable acoustic impedance data acquisition and analysis system

Details Portable acoustic impedance data acquisition and analysis system Portable acoustic impedance data acquisition and analysis system

1995-03-28

1997-11-04

Oda, Christine K.

Measuring and testing

Vibration

By mechanical waves

73588, G01N 2904

Patent

active

056842511

ABSTRACT:
A portable two microphone acoustic impedance data acquisition and analysis system provided in a lightweight, fully portable, battery powered instrument with a dual capability of either on-site or remote-site analysis of measured data on the acoustic impedance of acoustically absorbing duct liners of aircraft jet engines. The fully portable instrument is capable of being operated by relatively unskilled personnel to provide acoustic impedance and non-linearity measurements on acoustic liners at airports and aircraft maintenance facilities. The measured data on the engine duct acoustic liner can be an input directly to the data analysis system at the data acquisition site for on-site analysis, or can be recorded for input to a data analysis system at a later time, or can be recorded and transmitted, such as by a telephone modem, to a data analysis system at a remote-site. The remote-site analysis of data eliminates the requirement for skilled personnel at the aircraft to perform the relatively complex data analysis procedures.

REFERENCES:
patent: 4079198 (1978-03-01), Bennett
patent: 4601295 (1986-07-01), Teele
patent: 4768379 (1988-09-01), Arcas et al.
patent: 5377546 (1995-01-01), Arcas et al.

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