Show II S P GRACE OF or TELEPHONE E COMPANY PERFORMS MIRACLES l AT W 11 EST HIGH I IThe The ago age of miracles returned to Salt Lake City recently I A large crowd sat spellbound and almost unbelieving in m the auditorium of the West high choo las they sa save I and heard Sergius P Grace assistant I Ivice vice president of the Bell Telephone Laboratories Inc of Nc New York give ar demonstration of af marvelous dis- dis discoverIes discoveries dis discoveries in an sound transmission at a public meeting sponsored by the Utah Ut Section of the American Institute of af afI Electrical Engineers I If Mr 11 Grace had given such an c e c a 1 few hundred ago he heI bly would hive hwe been burned it itI I the stake for witchcraft I Mr Grace came to Salt Lake City I through the courtesy of President F FI FR FR FR I R ReId Read of the Mountain States Tel TelI Teli ie epho-ie and Telegraph company I The crowd of interested spectators spectator sa saw the artificial bI larynx laryn n with Ith which the tho v voiceless ss now can speak and they heard it used They heard the music of an orches orches- orchestra orchestra orchestra tra filtered faltered with only certain tones being reproduced They heard a picture pass over overa a wire to be assembled at the receiving receiving ng Ing- end Th They y heard th the palpitations of the th heart of one of the audience magni- magni magnified tied fled They heard how now the noise of the th movement ofa of a muscle would sound were ere the human car ear sensitive enough to detect It it They herd heird jazzy music inverted They listened to speech eh inverted In and then tr to its understand understand- understandable understandable understandable able form fann They heard herd speech xh scrambled into an unintelligible mass and then re- re reassembled reassembled 3 assembled They heard a voice valce at one ane end of af a short telephone line and walt waited d sev- sev several oral eral seconds to hear heM it reproduced And finally they saw i demonstration demonstration demonstratIOn tIOn in which music from a et cabinet which could no the heard hurd by the th au au- au audience hence or the subject of af the tet through ugh a wire through one mans man's b body dy and into the subjects subject's brain bram di- di direct direct di direct To prove that he heard the musk the subject of the ex experiment beat time with Ith his hands As Mr Grace Grace- was as demonstrating the device theres there VMS s a roar through the room like a speeding trl train tr in the sounds tremendously amplified com com- com com- coming coming ing mg from the tho contraction in Mr Graces Grace's jaw as he bit his teeth to- to together together to together gether They came through a micro micro- microphone microphone phone which picked up the noise produced by the contraction of the muscles Mr Grace q e-q explained e lamed that this phenomenon phe phe- phenomenon had recently been discover discover- discovered discovered discovered ed in m the the- laboratories and c explained that it was attributable to the fact that ear car drum and surrounding tissues are arc made to act is one plate of the conden condenser r receiver the resulting VI- VI vibrations vi vibrations of the tho car cir drum being inter inter- interpreted interpreted I by the brain as s speech ch mUSIC or whatever sounds were ere Impressed lor upon the original transmitter Mr Grace said that the sounds could be I beI tr simultaneously to at least three persons holding hinds hands It will not nat be long lang before fore you will go to a doctor when you have heart trouble and he will place a b u dU lis hs en Grace said in m connection with the reproduction of heart beats The doctor will then get out a record of heart art beats which he thinks thanks is as most mast lake the sound of yours As soon as ashe ashe ashe he finds the one which corresponds he will diagnose just Ju t what is the trouble with your our heart by comparing it with the records made by a famous h heart t specialist sp The artificial hryn larynx was demon demon- demonstrated demonstrated demonstrated with the aid ofa of a bellows The bellows ws Mr l Grace said would take the place of af the ev wind nd Ind which would come from the lungs of the dumb per per- person person per soni son The words were ere formed l by the laps and the ton tongue ue and the air reproduced reproduced the sound with the use of the artificial voice which much resembles former Vice President Daises Daes fam fam- fam- fam famous famous ous aus pipe You carry this voice valce 3 round around m in your our pocket Mr II Grace said I He told of one man of Virginia who after losing his has voice secured cured one of the artificial larynxes and returned to his has work as a salesman W With the I use of the artificial larynx a r person erson can speak across the continent by bv telephone phone For Far those whose whose- vocal vacal cords are paralyzed a synthetic lung has been developed I Another interesting ph phenomenon as the latest thing in m burglar ala ms ms- for safes Merely by b dropping a penny on i 1 steel similar to that of af afa ofa ofa a v v i l sound as set off h l a abu glar bu lar alarm I Mr l Graces Grace's J demonstration of de- de deh delayed de h ed s speech ech was as as particularly pT inter inter- interesting interesting esting Speaking into a transmitter I I he was aS able to delay delivery efY of speech to the loudspeaker loud speaker for faurI four faur faurand j I and one half seconds and also to toI cause at will electrical echoes so that the words wards were re repeated tOO one two t or I three times tames This delayed sp has i practical application in n lantic preventing howling ing mg One of the most amusing parts of af the evening for far the crowd d wis w when Mr Grace scrambled speech picc I chu ric-I ric it- it itally ally inverting it at so that high notes were ere low 10 and low notes high The Te speech was as then unintelligible But Buthe Buthe Buthe he showed that an electrical brain bram as ag he c it at could unscramble the sounds and translate them theom ink mje Ent En lash In this scrambled gibberish the GALLY TWO S P GRACE ETC i Words ards n spoken into the telephone were ere unscramble and 1 and came out of af the loud laud speaker as aiS telephone company campany i Mr Ir Grace explained that thIs scrambling of words made it possible to send messages by which are I unintelligible to an anyone ane except the listener at the station st which has re- re receiving re receiving apparatus to unscramble the message me While Whale the laboratories employs 1 00 persons and has an annual budget of the thc discoveries that have Continued on page p 8 Continued from frok J I been page page 1 made have saved sav d the telephone 3 compan company ol and the public Sli hundreds d of of dollars h he said lie He explained the how how the the l loading coil coU and the distance telephone e calls repeater made long possible without necessity would make make or of heavy j cO copper per wire which the calls almost k prohibitive in cost both TinUi to company and to the user Now N No long o TS distance callS made call re aa over wires no larger than the ordinary ary pin he he- said M f I Grace Grac Pointed out out ut that tW the i de- de de demint mint or of p pe together to a h 11 a nr n w v insulating ng material known n t 11 a gutta both products of the r mak possible u i 1 of ofa the eon con a telephone cable 1 across an antic lic to n V sUpplement 1 the radio V n wm in il te e Construction The 10 th of f C La Lain exp p ted to start within the next year ear r w n |