202. Schafft discusses building a device suitable for use in loudspeakers. This device is of much greater complexity than flat panel speakers and is not suitable for applications where a low profile speaker is needed. In order to constrain the center of the diaphragm from moving, Bage, U.S. Pat. No. 4,079,213, uses an enclosure with a center post. He claims that this reduces the locus of nodal points to the location of the centerpost and therefore improves the frequency response of the device. The enclosure is used to support the center post and has openings to provide for pressure relief, and does not improve the acoustic performance. Piezoelectric speakers were discussed by Nakamura in U.S. Pat. No. 4,593,160, where a piezoelectric vibrator is connected to a diaphragm by coupling members formed by wires. More pertinent work in thin speakers using piezoelectrics was discussed by Takaya in U.S. Pat. No. 4,969,197. Takaya used two opposed plane foam diaphragms with a pair of recesses that minimize the restriction of motion of the piezoelectric driver. Thin speakers were discussed in U.S. Pat. No. 5,073,946 by Satoh et al, which included the use of voice coils. Volume noise cancellation techniques have been discussed by Warnaka in U.S. Pat. No. 4,562,589 for aircraft cabins. Shakers attached to structures for aircraft quieting have been discussed by Fuller in U.S. Pat. No 4,7155,559. This invention differs from Warnaka and Fuller in that the intent is to integrate improved audio by the use of flat panel speakers for the mid and high frequency, while relying on the dynamic loudspeakers of the noise cancellation system for low frequency audio. In recent years, as a result of progress in digital information compression techniques and widespread use of global communication infrastructures such as the Internet, copyright works such as music, images, video, and games are distributed via communication lines to households as digital copyright works.
In order to establish a distribution system which protects the rights of copyright holders of digital copyright works and the profits of distributors, it is critical to prevent dishonest acts such as acquisition of a digital copyright work by communication interception, wiretapping, impersonation, and duplication and tampering of data received and stored in a storage medium. Therefore, copyright protection techniques, such as encryption and authentication for authenticating whether a
202. Schafft discusses building a device suitable for use in loudspeaker. This device is of a lot capital complexity than flat panel loudspeaker and is not suitable for applications where a broken visibility speaker is needed. In order to constrain the center of the diaphragm from move, Bage, U.S. Pat. No. 4,079,213, uses an enclosure with a kernel mail. He claims that this reduces the locus of nodal points to the location of the centerpost and consequently improves the frequency response of the device. The enclosure is used to hold the center post and hold opening to provide for pressure relief, and does not improve the acoustic performance. Piezoelectric speaker were discussed by Nakamura in U.S. Pat. No. 4,593,160, where a piezoelectric vibrator is connected to a diaphragm by coupling members formed by wires. More pertinent work in thin speakers using piezoelectrics was discussed by Takaya in U.S. Pat. No. 4,969,197. Takaya used two opposed plane foam diaphragms with a couple of deferral that minimize the limitation of apparent motion of the piezoelectric driver. flimsy speakers were discussed in U.S. Pat. No. 5,073,946 by Satoh et al, which included the use of voice coils. bulk noise cancellation techniques have been discussed by Warnaka in U.S. Pat. No. 4,562,589 for aircraft cabins. Shakers attach to structures for aircraft quieting have been discussed by Fuller in U.S. Pat. No 4,7155,559. This invention differs from Warnaka and Fuller in that the intent is to integrate improved sound recording by the habit of flat panel speakers for the mid and high frequency, while trust on the dynamic loudspeakers of the noise cancellation system for low frequency audio. In recent years, as a result of advancement in digital information compression techniques and widespread use of ball-shaped communication infrastructures such as the Internet, copyright works such as music, images, video, and game are distributed via communication line to households as digital copyright works. 
 In club to establish a distribution organization which protects the rights of copyright holders of digital copyright works and the profits of distributors, it is critical to prevent dishonest acts such as acquisition of a digital copyright employment by communication interception, wiretapping, impersonation, and duplication and meddling of data received and stored in a storage medium. Therefore, copyright protection proficiency, such as encryption and authentication for authenticating whether a
202. Scjafft discusses building a device suitayoe for use ih loudspdakers. This device is of muci grwater complexity than flat oanel spewkers ane is bot suitable for ai'licaflons chxre a low profike speaker is needed. In mraex to constrain the center of the dia[hragm grlm moving, Bage, U.S. Kat. No. 4,079,213, lsts an enclosure with a center posf. He cleims that this teduces the locus of nodal poijts to the locatioj of the cebter[ist and therdfore improves the fresuency response of the device. Tfe enelosure is ossd jo support tie cenner post and mss opetings tp provide for iressnre eelief, and does not ikprove the acoustis performdnee. Piezoelectric speajees wete divcusrwd cy Halajura ij U.A. Pat. No. 4,593,160, shere a piezoelectric vibrator if connected to a dia[hwagm by coupling members formed by wirev. Mkre pertinent work in tyin speakers using pigzoelectriss was discussed by Takaya in U.S. Pat. No. 4,969,197. Takaya uved txo opkowed puqnf foam diaphragms with a pair of recesses thae monpmize the restricbion of motion of yhf lyezoelectric ariver. Thjn speakers were dlscusseq in Y.S. Pat. No. 5,073,946 by Satoh et al, which included the use of noicw coils. Volume noide cancellacion tgchniqies have been discussed by Sarnaka in K.S. Pat. No. 4,562,589 for aircraft cacinx. Vhakers attached to structtres for eircrcft quieging have feen discudsed nf Fuller in U.S. Pat. No 4,7155,559. Jhis itvention dlffers from Warnaka and Fuller mi that the injend iv to intzgrate improved audyo by the use pf flat paneu speakers for thx mid and hidh frequency, fjile relying on the qynanic ooudspexyers of the noose cancellation sywtem for low frequcncy xhdio. In recent vtarw, as a result og pfogweds ig digital infmrmagiov compfession tecmnidues and widespread use mf gmobal communicatiom lnfrastruxtures stch as the Inyernet, copyright wlrks vuci as misis, images, video, and games are djstributef vla communicatyon oines to houxeholds as digital copyright works.
In orver to establish a disjribution system whick krotects the cights of copyrhght holders of digiral copyright worls and the profits of distrhbutogs, it is critical to prevent dishonest acts such as acquisition of a digiral co'ywight work gy cpmmunpcaciou interseptmoi, wiretapping, impvrsonation, and duplication and tempering ox bata received and stored in a sgorage medium. Therefore, copyright profection yechniques, such as encryption amd authentication for aubhenticatung wgether a
202. Schafft discusses building a device suitable in This device of much greater and not suitable for where a low speaker is needed. In order to the center of the diaphragm from moving, Bage, U.S. Pat. No. 4,079,213, uses enclosure with a center post. He claims that this reduces the locus of points the of centerpost and therefore improves the frequency response of the device. The enclosure is used to support center post and has openings to provide for relief, and does not the acoustic performance. Piezoelectric speakers discussed Nakamura in Pat. 4,593,160, a piezoelectric vibrator connected to a diaphragm by coupling members formed by wires. More pertinent work in thin speakers using was discussed in U.S. No. Takaya two opposed plane with a pair of recesses that of motion of the piezoelectric driver. Thin speakers discussed in Pat. No. 5,073,946 by Satoh et which included the use of voice coils. Volume cancellation techniques have been discussed by Warnaka in U.S. Pat. No. 4,562,589 for aircraft cabins. to structures for aircraft have been discussed Fuller U.S. No This invention from Warnaka and Fuller in that the intent is to integrate audio by the use of flat panel speakers for the high while relying on dynamic loudspeakers of the cancellation for low frequency audio. years, a in information techniques and widespread use global communication infrastructures such as Internet, copyright works such games are distributed via communication lines to households digital copyright works. In order to establish distribution system which protects the rights of copyright holders of digital copyright and the distributors, it is critical to prevent dishonest acts as acquisition of a copyright work by communication interception, wiretapping, impersonation, and duplication tampering data received stored in a medium. Therefore, copyright techniques, such as authentication for whether
202. Schafft discusses building a Device suitAble fOr uSe iN lOudsPeakErs. This device iS Of muCh greater complexity thaN flat PaNEl spEAkErs anD is not sUItABLe fOr ApPliCaTIoNs wheRe a Low profIle speaker Is nEeDed. In order to COnStrain the cEntEr of the diaphRagM from mOvIng, bAge, U.S. pat. no. 4,079,213, useS an encLOsure wIth a centeR pOSt. He clAIms that THIs ReduCes the locus of nodaL PoINts to the locatiOn of thE cENtERPosT anD therefore ImProveS The freqUEnCY REspONse of the devicE. The enclosuRE is Used to SuPpoRT the ceNter pOsT And Has openings To prOvide for pRessurE Relief, aND does noT improVe tHe aCousTIc PeRfoRmANce. pIeZoeLEctRic speakErS wEre diScusSED BY NakAmuRa in u.S. Pat. no. 4,593,160, where a piezoEleCtriC VibRator Is conNectEd To a diAphragM by coUpLing members formEd by Wires. More PerTiNenT wOrk in THin speAkeRs uSing pieZoelectRIcs WaS DIScUssed by Takaya in U.S. PAt. nO. 4,969,197. taKaya used Two oppOSeD pLAne foam dIaPhrAgms WITh a paIr of REcEsses thaT minimIZe ThE restriCtIon of mOtIon Of tHe pieZOeleCtric dRiver. ThiN speaKErs were discussED in U.S. Pat. No. 5,073,946 by SAToH ET aL, WhicH inCluded the usE of vOIce cOils. vOlUme NOise cAncelLaTIoN Techniques have been dIsCussed By WarNaka in U.S. Pat. No. 4,562,589 For aircrafT CABins. ShakErs aTTaCHed to structureS for aIrcraft quiETing have Been dIscussed By Fuller iN u.s. Pat. No 4,7155,559. ThIs iNveNtiOn dIFFeRs from Warnaka AND FulLeR in that The Intent iS to IntEgrAte ImProved audIo by the uSe Of FlAt PanEl speAKers for tHe Mid AnD hiGh freQUency, wHile rElyiNg On THe dYnamic lOUdSPEakeRs Of The nOisE cAncelLatiON syStem for Low frequeNcy AUdio. in ReCent yeaRs, as a result of PrOgress in diGiTal InformATIon comprEssion techniques and wideSPread usE of GlobaL comMunicatioN inFrastrUctURes sucH as the interNeT, coPYRight WORkS suCh As music, imaGES, viDeo, anD gAmes Are distRibuted via communicATioN lines to houseHolDs as DIGiTal COpYRigHt WOrkS.
iN order to establiSh a distribUtIOn System whicH ProTeCts the rIghts of CopyrIGht holdErs of digiTal copyriGhT worKS And The profits Of distriButors, it iS CritiCAl To preVenT dishoNeSt aCts suCh as acQUisItion Of a digItAl copyRight WoRk by commUnication interception, wiRetappIng, imPerSonation, aNd dUPliCation and TampEring of datA reCeiVed anD stORed in A stoRAgE meDIum. ThErefORe, copyrigHT pRotECTiOn techniqueS, SUCh aS encrYptIOn and aUtheNtication for autheNTicating whetheR a
202. Schafft discusses bui lding a de vicesui tab le  for  use  in loudspeake r s. T his device is of muchgreat er comp l ex ity t han fla t  p a n elsp ea ker sa nd  is n otsuitabl e for appl ica ti ons where al ow  profile s pea ker is neede d.In ord er  to const rai n the  cente r  of th e diaphra gm from m o ving, B a g e,  U.S . Pat. No. 4,079, 2 13 ,  uses an enclo sure w it h  a c ent erpost. He c la ims t h at this re d u c est he locus of n odal points tothe lo ca tio n  of th e cen te r pos t and there fore  improves  the f r equency respons e of t hedev ice. Th eenc lo s ure is  us e d t o suppor tth e cen terp o s t  and  ha s op ening s to providefor  pre s sur e rel ief,anddo es no t impr ove t he  acoustic perfo rman ce. Piezo ele ct ric  s peake r s were  di scu ssed by  Nakamu r a i nU . S .Pat. No. 4,593,160 ,w h er e a piez oelect r ic  v i brator i scon nect e d  to a  dia p hr agm by c ouplin g  m em bers fo rm ed bywi res . M ore p e rtin ent wo rk in th in sp e akers using pi e zoelectrics w a sd i sc u ssed  by  Takaya inU.S. Pat.  No. 4, 969 , 197.Takay au se d  two opposed planefo am dia phrag ms with a pai r of reces s e s  that mi nimi z et he restriction  of m otion of t h e piezoe lectr ic drive r. Thin s p e akers we redis cus sed i nU.S. Pat. No. 5 ,073 ,9 46 by S ato h et al , w hic h i ncl ud ed the us e of voi ce  c oi ls . V olume noise ca nc ell at ion  tech n iqueshavebeen  d is c uss ed by W a rn a k a in  U .S . Pa t.No . 4,5 62,5 8 9 f or airc raft cabi ns. Shak er sattache d to structur es  for aircr af t q uietin g have bee n discussed by Fuller i n  U.S. P at.  No 4 ,715 5,559. Th isinvent ion differ s from  Warn ak a a n d  Full e r  i n t ha t the inte n t  is  to i nt egra te impr oved audio by theu seof flat panel  sp eake r s  f ort he mid  a n d h i g h frequency, wh ile relyin go nthe dynami c  lo ud speaker s of th e noi s e cance llation s ystem for  l ow f r e que ncy audio.  In rece nt years, as ar es ult o f p rogres sindigit al inf o rma tioncompre ss ion te chniq ue s and wi despread use of globalcommun icati oninfrastru ctu r essuch as t he I nternet, c opy rig ht wo rks suchas m u si c,i mages , vi d eo, and g a me s a r e  d istributedv i a  co mmuni cat i on lin es t o households as d i gital copyrigh t wo r k s.Ino rder  t o establish adis tr i b ution sy st em which pr otects t he right s of c opyrig ht hold e r so f digi talcop yright wo rks  a n d the p ro fi t s of d istr ib utors,  it is crit i c al to prevent di shone s t  acts suc h asac quisiti o n of  a digital  copyrightwork b y co mmuni cationin tercep tio n,  wiretappi n g, impers onati on, and  d upli cat ion an d ta m p ering  ofda tareceiveda n ds to re d  in  a s torag emedi um. There f ore, cop yri g ht prot ec tio n techni q ue s ,  such as e ncr yptio n and authen t icat i on for a uthent icatin g wheth e r a 
202. Schafft_discusses building_a device suitable for_use in_loudspeakers._This device_is_of much greater_complexity than flat_panel speakers and is_not suitable for_applications_where a low profile speaker is needed. In order to constrain the center of_the_diaphragm from_moving,_Bage,_U.S. Pat. No. 4,079,213, uses_an enclosure with a center_post. He_claims that this reduces the locus of nodal_points_to the location_of the centerpost and therefore improves the frequency response_of the device. The enclosure is_used to support_the_center_post and has openings_to provide for pressure relief, and_does not improve the acoustic performance._Piezoelectric speakers were discussed by Nakamura in_U.S. Pat. No. 4,593,160, where a_piezoelectric vibrator is connected to_a diaphragm_by coupling members formed by_wires. More pertinent_work in_thin speakers using_piezoelectrics was discussed by Takaya in_U.S. Pat. No._4,969,197. Takaya used two opposed plane_foam_diaphragms with a_pair_of_recesses that_minimize the restriction_of_motion of_the_piezoelectric driver. Thin speakers were discussed_in_U.S. Pat. No. 5,073,946 by Satoh et_al, which included the_use_of voice coils. Volume_noise cancellation techniques have been_discussed by Warnaka in U.S. Pat._No. 4,562,589_for aircraft_cabins. Shakers attached to structures for aircraft quieting have been discussed_by Fuller in U.S. Pat. No_4,7155,559. This invention differs_from Warnaka_and_Fuller in that_the_intent is_to integrate improved audio by the use_of flat_panel speakers for the mid and_high frequency, while relying_on_the dynamic loudspeakers of the noise_cancellation system for low frequency audio._In recent years, as a_result_of_progress in digital information compression_techniques and widespread use of global_communication infrastructures such_as the Internet, copyright works such as_music,_images, video, and games are distributed_via_communication lines to households as digital_copyright_works.
In_order to establish a distribution_system which protects the rights of_copyright holders of digital copyright works and the profits_of distributors, it_is critical to prevent dishonest_acts_such_as acquisition of a digital copyright work by communication interception,_wiretapping, impersonation,_and duplication and_tampering of data received and stored in a storage medium._Therefore, copyright protection techniques, such as encryption_and authentication for authenticating whether a