Use this URL to cite or link to this record in EThOS:
Title: Use of a twin-inverted pulse sonar (TWIPS) to discern between solid objects and bubbles
Author: Finfer, Daniel Clark
ISNI:       0000 0004 2677 9294
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 2009
Availability of Full Text:
Access from EThOS:
Full text unavailable from EThOS. Please try the link below.
Access from Institution:
This thesis shows how a twin-inverted pulse sonar (TWIPS) can take advantage of nonlinear bubble dynamics to suppress undesirable bubble clutter in sonar systems. This sonar requires the production of two high-amplitude pulses in short succession, the second of which must be 180° out of phase with the first. It will be shown that the echoes from these excitations can be combined to selectively suppress between even- and odd- harmonic energy. After a simulation is used to prove the TWIPS concept, an experiment will be described wherein this method was tested in a controlled environment on a replicated oceanic bubble cloud. The novel bubble-cloud generating machine will be described in detail. The results from a TWIPS sea-trial will then be used to show that the method works not only in controlled environments, but also in the open water. Finally, a review will explore newly-discovered links between the echolocation abilities of acoustically-active, coastally restricted cetaceans and TWIPS. That review will show using pre-existing data that some coastal dolphin species seem capable of generating pulse-pairs wherein the second pulse is 180° out of phase with the first.
Supervisor: Leighton, Timothy G. Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available