Iterated Low-Pass Filters for Towed Arrays.
Abstract
The vibration-isolation module in a towed array system is replaced first by a classical low-pass filter made up of alternate lumped masses and springs. This iterated filter is modified (usually resulting in combinations of passing bands and rejection bands) by: (1) replacing the lumped springs (which may be ruled out by other constraints) by short lengths of cable, (2) replacing the lumped mass by a 'dynamic mass' (to lower the cutoff frequency), (3) alternating short mismatched cables. The cutoff frequencies, bandwidths and maximum attenuations are compared. Combinations are suggested.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 27, 1974
- Accession Number
- ADA016840
Entities
People
- Albert A. Hudimac