Recovery of Acoustic Pulse Waveforms Using Calculator-Controlled Signal Processing,

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Abstract:

An electronic calculator, a digital recorder, and suitable interfaces have been assembled to provide an inexpensive signal averaging system for the recovery of weak acoustic pulse waveforms. Periodic pulse waveforms between 25 and 300 kHz, with pulse repetition frequency typically less than 50 Hz, are sampled at rates indicated by sampling theory up to a maximum sampling rate of 2 MHz. The highest frequency which can be resolved is thus one MHz. Sampled waveforms are accumulated, averaged, and made available via a plotter and paper tape punch. Author

Author(s):
Moore, W. E.
Author Organization(s):
NAVAL RESEARCH LAB WASHINGTON D C
Pagination:
0023

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NRL-7658
Task Number(s):
SF43452005, 01360
Project Number(s):
NRL-S01-49, SF43-452
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*Acoustic signals, *Signal processing, Waveforms, Data acquisition, Digital systems, Plotters, Punched tape
Field(s)/Group(s):
Computer Hardware, Acoustics
Keyword(s):
HP 91000A programmable calculators, HP 12802A programmable calculators, HP 12797A programmable calculators, Most Project 3, Most Project 3
Report Date:
1974 Mar 08