A dynamic configurable sensor for fractional-octaveband underwater acoustic measurements

M.W. Legg, David Matthews

Research output: Chapter in Book/Conference paperConference paperpeer-review


This paper reports on an underwater acoustic sensor used to demonstrate dynamic configurable Field Programmable Analogue Array (FPAA) devices. A single FPAA device was connected to a microcontroller and programmed to sweep through a set of fractional one-third octave filters with centre frequencies from 100 Hz through 20 kHz. Fourth order filters were designed using a cascading topology and approximated using two second order filters available in the FPAA. Sweep timing characteristics were controlled by the microcontroller to allow for settling time and a predetermined estimation uncertainty for each fractional octave band. Laboratory testing compared the filters with the relevant ANSI standard. Field measurements were conducted in the shallow waters of Cockburn Sound. Results of laboratory and field measurements are presented and discussed
Original languageEnglish
Title of host publicationAcoustics 2011: Breaking New Ground
Subtitle of host publicationProceedings of the Annual Conference of the Australian Acoustical Society
EditorsDavid J. Mee, Ian D. M. Hillock
PublisherAustralian Acoustical Society
ISBN (Electronic)978-0-9757855-8-4
Publication statusPublished - Nov 2011
Externally publishedYes
EventAcoustics 2011: Breaking New Ground - Gold Coast, Australia
Duration: 2 Nov 20114 Nov 2011


ConferenceAcoustics 2011
CityGold Coast
OtherAustralian Acoustical Society Conference 2011
Internet address


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