Show rr 4 4 it KS ia ENO 4 IN w cewe jaws t 1 1 by ay JOHN DICKINSON SHERMAN OU will 1111 admit 1111 without question that ft a person entirely deaf Is badly handicapped you pre c can flaum figure out by putting your you imaging it HOD at work with till y your r experience ahat hat a very different w world 0 r 1 d t this would be if all it ita inhabit t tanta t h had al always been unable to hear bound the importance ot of sound d 1 in the manifold activities a of human life te 1 la inestimable sound tor for us consists of air vilma it plus the hum human nil ear Is the b human u man ear any more mom perfect than the ho human m an eye eyel 7 the microbe microscope up a to say ally nothing clothing of at t the a tat telescope pa has ban revealed to as AM As aa entirely pa new world beyond mans anna unaided vision and a world ot of ill estimable a his import importance now cornea comes the tha ultra audible microphone to reveal to us ua the new world of sound ad that 1 Is beyond the power 0 of the abo human ear bar 1 its possible dha l A y 1 are purely guesswork they caay be A as important to nian man as 48 the disclosures dla closure ot of the microscope owes roost of it ita lanni fledge of the mechanism of the human so ear to the tha telephone industry which in it ha As search CIA for far a perfect telephone was forced famed to study the bojet es of human on speech and ad hearing and here I 1 la tile the way bay the human ear bar gorka the ear that we a eee 1 la merely the wood sound catcher entering the bound clear me en counters tile the ear eardrum draw which it vl 11 brute branoa next are am thes area little be bones which magnify these them vibrations vibration to the last ing bone boas la Is attached it a roup liquid oiled filled back in the form of a fr inside this seek sack la IS ft tha true begun of hearing take 1111 this organ r n out wid and uncoil it and d you am have a little ladder bout about an AD inch bud and a quarter long with several I 1 I 1 loaming ploll separate plo nl set closely SlA their and longer at one no end of by the holder than at the a that other each rung rang to la a sepa separate elvin living 9 ft fiber b C r and d each has its tiny nerve through which it tends its manci age to the brain shrill son abunda B it A act the tha abort her t ra runes B A of the ladder deep mounds bounds the other end d if the I 1 ladder abler Is imperfect hear bear PHI I 1 ing la imperfect t deep sound a are produced b by slow vibrations of the aa raba aby clr sounds by did vibrations vibration the there are 1 piston persons win who at hear high miss at an all others hear bear lou ion notes imperfectly incidentally some day we a shall sea people wearing ear spectacle just ns as people wear glosses glasses tor far defective ali study of the radio p problem brought about the invention B of f the h ultra audible microphone or dr phill alps thomal of 0 the research reHear cli start staff of the westinghouse electric wid and manufacturing company 1 Is the I 1 in lanthe lant he 1 Is shown how here her listening 1 in on an a moth practically all radio trans and ten depend tor for their operation upon 11 flit thin disk of metal called a diaphragm no diaphragm to 9 date resi ondo perfectly to musical sounds bounds that have b ave a very high lumber of albra chals dr shown was as working to remedy this defect says say S M kint ner director of tile the company s research laboratories one the best bent way to gain owe ran con of the tha possible ilife importance of y low A ultra audible sounds bounds la it to realize that the normal person penn Is la in the acme am B relation to this ahse sounds as an the stone two deaf PC person 1 Is to audible bound all above I 1 the he range of the human buman ear there is possibly a vastly greater TO bety or of bounds unit which ought to be just as U useful ful to us a no are audible sounds bounds I 1 the he ultra audible microphone should be to the ear what the microscope cap 1 la to the eye just what it will bring da als no one can say bay but every invention that has ban extended the range of our senses he has revolutionized our ideas and this one la Is likely to do the same ime sound board of mune course con consists siss ol of air vibrations when he the rate at of f tile these sab vibrations t I 1 ance Is 1 blow me my bay it 40 times a second we bear a deep isma bass sole note wilra when the vibrations wwade number we hiar ata the note we call middle 0 1 af AC 12 32 vibrations b per par AN second and wen we reach each the upper limit of musical sound tor far moat net ears at 20 vibrations per second the sound passes be yond yana the of ordinary human hearing the air can however vibrate at a m t up to t 0 a all 1 lm or 0 r more mo re times t i m R second e d and d lt it i ia alg highly h ly p probable b bi b that it 11 1 Is cau constantly doing no hena thus there 1 Is a range of sounds sound fr from ad odo vibrations lb ration per second ad upwards pd to A an unknown I 1 limit 11 1 1 of bah we have halt efto lived in complete ignorance but which co can now be studied by us as tile the instrument invented by or dr thomas consists essentially of a ring a 9 of insulating material la in which in two a small electrodes are inserted distant ricilly opposite to each other A high voltage Is applied to these elec electrodes and ad there final far forma between them a glow discharge which 1 la neither a spark park no nor an arc am but a streak of soft purplish light this glow nas found by or dr thomas to have tile the peculiar p alar property of being affected by sound waves as aa conveyed by the air whom when the sound bound waves strike it it vl ad brute brates to in sympathy with ith them and in doing BO a ca causes exactly correspond lug ing changes change in the flow at 0 carat to I 1 the electrodes electrode telephone hons and radio transmitters or are vibrated by sound bound this makes the electric transmission of speech p possible ibis however no diaphragm that haa be so afar far been designed ree ponda perfectly to sounds bound having Ini vibrations vibration aboe b time a second since many musical sounds have vibrations higher than this rate music broadcast by such lean transmit swit to Is not perfect dr thomas was givers given the task of remedying this cl defect and discovered the tact fact that the glow discharge would vibrate in per feet fact sympathy with every sound and hence was able b to transmit music air pi fleetly ad or broadcasting p u r pobe P but its greater rent CT toon soon bw bo co came hat evident AS AB far as C can A be deter data man a ch the glow all aln ching will respond to A adv vibration fl ard up to the uttermost limit whatever that may be hence by ltd ue nil eon a n da in the ultra audible regi region a can be idelt red and ad studied with until recently the him n a P phone CIA afis IB A an ex As P state and D dr thomina himself WIB was an the AM only any I 1 parson am able abe I 1 to a make it iier fona properly th tha have I 1 1 VA I 1 A it A be boen removed however and ad the new clow instrument can now new be made mad available tor for scientific purposes the asti 9 house engineers will pursue studies of th the I 1 e ultra audible field but I 1 in all like II 11 lahood h a ad will confine confide their that attention tt tf to tan subjects of immediate practical ira do con I 1 ahe ile potential value of such an in igat is evident t if we C consider dt vest an allied flat field it ea namely ay ether A albra A ehms for a long time man know knew only two linda of other ether vibrations heat beat suit and visible light since then the scientific research has added other forms forma of ether vibration such euch a aa the than X araa ras electric waves slaves ultra ultraviolet joint a or A actinic raya mys and radio waves wavea th the if aleut useful usefulness nes of all of file these al dif lerent forent forma form of vi vibrations bati 1 is 11 common a ledge ultra audible soon sound vibrations eions may prove to P be a equally eduali valuable I 1 in many macy va baia cut col gebie rail fabian f an may find his sound ent t by the use of the ultra ual audible dible 1 phone colonel baby 60 acre Inre an estate near geneva eneva ill III contains famous labora laboratories devoted in ia part pan to the at aoudy u aly of sound there them he ha 1 Is devot leg ing his fortune to the bolvi solving of fid autu A 11 he la Is varl working i aa on a big scale 1 there are 35 budd buildings g on ill ills estate tat A aa all the act aalto fine workers live la in special houses bouses under quite a colony 8 ate stem E colonel alone illas fabian himself if has achieved tame as hig cef a cry cryptologist I 1 t an expert in in the cipher a di be lug and 1 ot of codes uncle 8 aam a turned to him for aid in the war world al war and at one time more foore ch aaa student 1111 were war anar leAnd the there lab laboratory omry activities the la a codes ale trench warfare and munitions rest cost this patriotic patrio tit rl c st at least all at dar a quarter of a mi ME ma LI ion m during ing the world war or the sound laboratory one of a dozen contains a building ut within bw building I 1 ibis bia inside but building kling be haa special and am wads and aad 1 sound proof both from the outside and on the inside in it A is a e collection of f 73 organ pipes that runge range in size a and tone A piano chimes and in the gd e cot olle lection twit of tuning forks in bil the world n are also available th the transmission C of and absorption of sound bound are here studied perhaps peril n pa more conifrey cant ely titan than anyta here else on earth in wid addition itin to tile tiie study of at sound an lidmil the experts are am at eth work corli al on the f functions ff and ad ties of the human ear colonel habyan E Is not much more communicative about certain unusual in sound bound than the I 1 silent m t Split sphinx 1 mentioned by senators senator P pat t harrlson H in his keynote sion speech nil at t the ibe democratic com antion but it Is 15 known trial that some anam extraordinary tile co coteries veries cov orles will be made public sooner or later by the riverbank bank labora I 1 a bora aril |