Study Guide for MATH 596A at UA
Study Guide for MATH 596A at UA
Popular in Course
Popular in Department
This 4 page Study Guide was uploaded by an elite notetaker on Friday February 6, 2015. The Study Guide belongs to a course at University of Arizona taught by a professor in Fall. Since its upload, it has received 25 views.
Reviews for Study Guide for MATH 596A at UA
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 02/06/15
Math 596a Student Questions on Spontaneous Otoacoustic Emission Generation Septmber 2008 Zurek 1981 For the SOAE supress on exper ments t s ntutve that the frequency cosest to the OAE frequency w be most effect ve n supress ng t But the ntru g ng aspect s the spec ficty of the mechan smsystem to that frequency Tona frequenc es ower or h gher than OAE need much h gher sound pressure eve to supress the OAE by 4 dB Why wou d the frequenc es ower than the OAE frequency be more effect ve n supress ng t compared to the h gher frequenc es F g 2 s not symmetr c F g 3 shows ower frequenc es supress OAE s gn ficant y at ower sound pressures It was not c ear how the number of pat ence s c was p cked to get resu ts wh ch are representat ve for the major ty of peop e Why d d the author compare h s exper menta resu ts to trad t ona hear ng exam natons Why exact y are SOAE s on y detected n hea thy ears Th s paper seems to be one of the first to attempt to understand SOAEs A b g quest on s What s the source of the tona s gna quot The author conc udes the s gna s of coch ear or g n rather than vascu ar or g n The spec fic mechan sm w th n the coch ea s eft as an open quest on What connect ons fany ex st between OAEs and phys ca character st cs hearng mpa red or not tnn tus or not sex age etc of humans Those subjects who comp a ned of t nn tus d d not exh b t SOAEs n the author s exper ments Is ta ways the case that someone w th t nn tus w not exh b t SOAEs Cou d exam n ng the structura d fferences between hea thy and hear ng mpa red ears prov de some ns ght nto some of the under y ng mechan sms beh nd SOAE s Why do tnn tus sufferers show no SOAEs Is there a correspondence between the tone heard by a t nntus sufferer and the peak frequency of the h s prev ous SOAEs Regard ng suppress on what s the t me durat on of suppress on Does the return to SOAEs ook ke a therma re axat on How exact y does the frequency se ect v ty demonstrated by the suppress on exper ment support the coch ear vs vascu ar or other or g n theory G ven what was earned from th s paper what other stud es may be done to test act ve vs pass ve b ophys ca propert es and the r effects on OAE s n humans as we as other spec es Bialek and Wit 11984 Hav ng tte know edge of quantum mechan cs I cou d use some more very basc nformat on on what t meansfor sound osc at ons to be quantum m ted What s no se temperature Quantum m tat on seems to mp y act ve fi ter ng Can the methods n the paper be used to ru e out pass ve stand ng waves How Can we find a Green s funct on for the ear How does the ear as a b omechan ca system approach the quantum m t How can I mag ne the feedback mechan sm n the ear wh ch was mode ed How much do the deta s of the geometry and the nd v dua character st cs of each ear nfluence the mode parameter n these very s mp e mode s The authors presented a damped massonspr ng osc a tor w th act ve feedback to compare w th the OAE measurements of a patent They c a m that there s qua tat ve and quant tat ve corre at on between the mode for the osc ator system that they presented and exper menta va ues but d d not prov de any d rect compar son A so the conc us on drawn from ther work was that the mode su ts we w th the not on of actve fi ter ng mechan sm n nner ear the nstab ty n wh ch wou d cause em ss on of OAE I d dnt qu te understand how we can exp a n that and how nstab tes wou d occur ead ng to OAE Is the ser es representat on of the ntegra term on the r ght hand s de of the first SDE just fied If not how does that affect the subsequent ana ys s Author states that they cons der on y the s mp est form of the r mode w th regard to the feedback funct on They c a m more rea st c cases g ve essent a y the same pred ct ons for the quantt es of nterest nth s workquot What more rea st c cases d d they cons der How d d the resu ts d ffer The data n the paper for the probab ty d str but on for the ear cana sound pressure was taken from one ear from one subject How typ ca s th s graph How does t d ffer among subjects Shou d more than one subject have been cons dered What exact y s the d fference f any between the not on of a quantum and a therma m t Are the two mutua y exc us ve van Di39k and Wit 1991 j Out of the d fferent osc ator types ana yzed wh ch one s the best to descr be the exper menta observat ons Where wou d wh te Gauss an no se and where wou d narrow band Gauss an no se stem from The presentat on po nted out that a near stffness osc ator w th narrow band Gauss an no se may be ab e to mode SOAE But the spec fics of the ears structure n a phys o og ca sense shou d a so po nt towards the source of narrowband no se It was never rea y ment oned what these mode s cou d be used for n any pract ca app cat on Th s cou d be a focus of the fina d scuss on Wou d the ana yss of the co ected data be d fferent n any s gn ficant way fthe samp e sze had been arger And are the conc us ons of the r mode ng work senstve n any way upon assumpt ons derved from th s data Is t reasonab e to use the same mode for human and frog SOAEs How are the under y ng mechan sms s m ar and how do they d ffer Are they both best mode ed by the same type of osc ator and no se source Th s paper s from 1990 The author proposes two exper ments n the conc us on to understand the reason for s ow frequency fluctuat ons observed n SOAEs Were these exper ments ever done Of the mode s cons dered near stffness Gauss an no se non near stffness etc wh ch has the most b o og ca y sat sfy ng assumpt ons or are they a equa y feasb e Can any of these mode s be used to ru e out the pass ve stand ng wave theory for OAE s Wou d heterodyne measurement of the frequency sh ft been super or to the pure y numer ca ana ys s emp oyed here At the quantum m t do we expect to see the equ va ent of numberphase He senberg uncerta nty What does that mean n th s context Lorentz ans often arse from d ss pat ve phys ca processes such as spectra co son broaden ng Brown an mot on of an overdamped partc e n a harmon c potent a or of course the Lorentz osc ator mode for opt ca response These are a somewhat sm ar systems espec a y the ast two nth s mode s the coch ea ke the overdamped partc e and Lorentz osc ator and s that why we fit Lorentz ans The phrase just a mechan sm n the ear was sa d What exacty s th s not on of a mechan sm See ng that van der Po osc ators or at east van der Po ke osc ators mode SOAE propert es pretty good are we to conc ude that the ear s comprsed of van der Po osc ators Talmadge et al 1992 Why use secondorder osc ators Why not someth ng h gher order What are the m ts of these mode s n exp a n ng the SOAE pecu art es SOAE depends on a much arger range of parameters wh ch these mode s are unab e to capture If we were ab e to find a mode n that form as t was presented nth s presentat on what wou d be the next steps to take to take advantage of such a mode and he p human ty advance Aga n the pr mary corre at on between the mode s d scussed n the paper and the exper menta resu ts are qua tat ve A so there was no conc usve resu t attr but ng one mode over the other Does that mean that the osc ator systems are nadequate to mode SOAEs How s the approach taken nth s paper d fferent than the one taken by van Djk et a mm How does the mpedance m smatch at the coch ear boundary re ate to Rstapes What exacty does tmeans for the amp tude condton to not be met for RRstapes What s the m dd e ear transfer funct on There were severa graphs were the authors dec ded to take out a few po nts for the cune fits The quest on s fth s s rea y justfiab e and fthey are notjust tweak ng the r resu ts to how they want them to be When match ng the exper menta resu ts w th the resu ts from the mode t seemed to me that t was not easy to dec de fthe exper ments and the mode match very we It seems that there s a ot of uncerta nty nvo ved and the spread ng s a ways very arge What s a good match between exper ments and the mode For someone who s not so fam ar w th th s research area t s not easy to dec de th s The g oba stand ng wave mode ca es s c for trave ng wave that s essesnt a y reflected back and forth In the first cass t was presented that the nput energy s a most comp ete y d ss pated at character st c ocat on a ong the bas ar membrane Doesn t th s contrad ct w th th s proposed theory of trave ng wave Is the act ve versus pass ve d st nct on n the g oba stand ng wave mode GSWM ana ogous to how that d st nct on s used n the oca osc ator mode s Isthe GSWM near or not Does how th s mode cons der the effect of an externa dr v ng force d fferent y than the other mode s Wou d a oca osc ator mode pred ct and SFOAE What wou d the 3Dp ot F g7 ook ke for the other types of mode s Wou d you see a smooth y vary ng phase Vilfan and Duke12008 Can th s mode be cons dered m dd eoftheroad between the oca osc ator mode wh ch cons ders the ear n terms of one un t and the stand ng wave mode wh ch cons ders the ear as a who eD d the stand ng wave mode mot vate a sh ft away from the oca osc ator mode as sseen here The mode seems to match we w th the exper menta observat ons Moreover t s based on act ve feedback osc ator mode s coup ed w th each other Can th s mode be used towards SOAE n mamma an ear What s the advantage of mode ng the system as an mu t osc ator mode n compar son to the stand ng wave mode or the s ng e osc ator mode What s the phys o og ca mot vat on for these mu t osc ator mode s How robust are these mode s And does the robustness of these mode s mp cate someth ng about the usefu ness of these mode s How does the ncorporat on of rregu arty n th s mode compare to that used n the stand ng wave mode Shera 2003 The approach taken nth s paper at east as t s wrtten up s to add n more and more success ve rea stc comp cat ng features Is th s a good way to mode Is ta good way to present a mode Is the GSWM ana og exp anat on for nonmamma an SOAEs proposed by Shera 2003 cons stent w th the mode proposed by V fan and Duke General Questions How do the var ous mode s make testab e pred ct ons f at a 7 Do the authors try to test these pred ct ons7 Do what extent do the mode s constra n themse yes to the data Does the mode come from the data or s the data v ewed as a means to comp ement the mode 7 What exact y s meant by an externa dr v ng force7 Is tan externa acoust c st mu us or some sort of therma no se present ns de the ear How do exp anat ons from the stand ng wave mode compare to those of the oca osc ator mode s7 Do the figures the authors chose to show effect ve y make the r po nts7 Do the figures a one te the story of the mode 7 What are the s mp fy ng assumpt ons the var ous c asses of mode s e oca osc ator vs coup ed osc ator vs g oba mode made7 What ro e does non near ty p ay n the var ous c asses of mode s7 Non near ty7 The GSWM shows figures of em ss on phase What s the reference for SOAE phase7 How come none of the other papers seem to show SOAE phase7 NOTE the not on of em ss on phase s d fferent from the dynam ca systems concept of phase space that s emp oyed n some of the papers Th nk about the paper you read Do you get the sense that the authors understand the r mode 7 Do youth nk they wou d be ab e to read y understand the mode s presented n the other papers Are these papers access b e to nonmode erspeop e w thout a mathemat cs background7 What wou d a c n ca aud o og st who m ght want to measure SOAEs n patents wa k w th from these papers
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'