On the basis of an acoustic biometric system that captures 16 acoustic images of a person for 4 frequencies and 4 positions, a study was carried out to improve the performance of the system. On a first stage, an analysis to determine which images provide more information to the system was carried out showing that a set of 12 images allows the system to obtain results that are equivalent to using all of the 16 images. Finally, optimization techniques were used to obtain the set of weights associated with each acoustic image that maximizes the performance of the biometric system. These results improve significantly the performance of the preliminary system, while reducing the time of acquisition and computational burden, since the number of acoustic images was reduced.

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l h e prcsciit pubIication shows a nioclel of a monitoring systcm of high benefits, based on hvo complcmcntary senswial systcms (lmagc + Acoustics), which allow the information rcceived to iusc, and to prioritizc the cornputalionlzl resources toward h e zones with conskterablc risk. developcd by the Multimcdia Technology Group of the E.T.S,I. of Tclccommunication in Valladolid (Spain), such as:The application uses componcnts completely Activc acoustic radar bascd on a phase array of microphones, with tcchniques of bcani conformation, and multibeam dcicction schemes (Spmish Patent No. P9502458). Efficient comprcssion algorithms and vidco transmission in rcal time. E.1:S.I. de Tclccumunicacinn, Uuivcrsidad dc Vnlladolid, Carrctcre tld cfiii~ntcrio, s/n, Villlildolid -4701 1, Spain. Dascd on a preacriration at Cxrtahrin '0% 0885/6985/(10/ $10.00 12000 IEEE The systcm is composed by an arbitrary number of sensors (Muniton'ng Probes), distributed by thc monitoring space, a data nctwtirk arid a central scrvcc (Monitoring Manager). Thc sensors consist of a microproccssor, with its memriry and ihrcc inaiti modules: 2) acoustic radar; 2) video capturc card; and 3) nctwork card. The flcxibiliiy of the syslcin allows ncw modules to be addcd such as: pcrsonal doteclor card; sound card; cards for tele-control; etc. Thc sensorial microprocessor prc-proccsses the inEormation rcceived by thc modules, packs and transmits it to the ccntral server through a data network. Thc syslcm USCS IP protocol, and SNMl'V2 for managcment. 1999 Pioneer Award Winners, Britten Vincent, Jr. (1) nnd Tom Hyltin thank AESS President, Myron Grrenhnirm at the Awards Ceremony at AUTOTESTCON in San Antonio Myron Greenbaum, Outgoing President, Holds thc Plaquc Presenled at the September BOG Mccting by Paul Kostek, Incoming President uf IEEE/AESS

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