Design of an Active COC Filter for Audio Frequency Signal Processing.

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Abstract:

COC filters are signal processing devices that are comprised of a lossy, nonuinform delay line. They are used for time domain analysis of short, transient, non-periodic, analog signals and provide a three-dimensional description of the waveforms suitable for use in classification. Potential applications include analysis of sonar and radar signals, speech recognition and other tasks requiring pattern recognition of analog waveforms. This class of devices was developed from studies of the signal processing function of the hydromechanical action of the inner ear, which is known by the anatomical name cochlea. Design considerations, performance specifications, and circuit implementation of a 48 channel COC filter are presented in this report. The instrument operates on a bandwidth of 50 to 20,000 Hz. Author

Author(s):
Steer, Robert W. ; Rock, James C. ; Mundie, J. Ryland ; Osborne, Donald
Author Organization(s):
FREQUENCY DEVICES INC HAVERHILL MA
Descriptive Note:
Technical rept. Mar 73-Dec 74,
Pagination:
0035

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AMRL-TR-75-78
Contract/Grant Number(s):
F33615-73-C-4065
Task Number(s):
723303
Project Number(s):
AF-7233
Monitor Series:
TR-75-78
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*SIGNAL PROCESSING, *AUDIO FREQUENCY, *AUDITORY SIGNALS, *COCHLEAR NERVE, SIMULATORS, SIMULATION, SPEECH RECOGNITION, PATTERN RECOGNITION, RADAR SIGNALS, SONAR SIGNALS, HYDROMECHANICS
Field(s)/Group(s):
Cybernetics, Electricity and Magnetism
Keyword(s):
*Cochlear filters
Report Date:
1976 Jan 01