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Mu s i ct e c hn ol og y

He a r i n gi n3 D K eyc on c ep t s i t Da n dI D R eve r b D i r e c tS ou n d , Ea r l yR ef l e c t i on s


wehe a ri nt hr eed i men s i on s Us i ng onl yours e ns eofhe a r i ng,wec a n di s c e r nahugea mountofi nf or ma t i ona bout ours ur r oundi nge nvi r onme nt . Wi t houre ye sc l os e d, wec a nhe a rwe t he rwe a r ei nat r a i ns t a t i on,a na i r por t ,ac a ve ,a f i e l dora tt hebe a c h. a nhe a ri ft hewa l l sa r eha r dors of t ,i f Wec t hec e i l i ngi shi ghorl owa ndi fi ti sni ghtor da y . Wec a nt e l lwe t he ras oundi sc omi ngf r om i nf r ontorf r om be hi nd,f r om t hel e f tort he r i ght ;i fi ti sne a r byorf a ra wa y . Thi swe e kwewi l ll ooka thow ourbr a i ns pr oc e s st hes oundsa r oundust ot e l lusa l l t he s et hi ngsa ndmor e .

Phr a yaNa khonCa vei nKha oSa m RoiYotNa t i ona lPa r k, Tha i l a nd


ab eei nt her oom. . . Youc a nhe a ri tbuz z i nga l la r ound-al owpi t c he d,s of tdr one .I tf l i e s f ur t he ra wa y,a ndbe c ome squi e t e r( l owe ra mpl i t ude ) ,t he ns udde nl y be c ome si nc r e di bl yl ouda si tda r t st owa r dsyoure a r s . I tt r i e st oe s c a pet hr ought hewi ndowbuthi t st hegl a s s , i t swi ngsc r e a t i ng ahi ghpi t c he dgr a t i ngnoi s ea st he ybe a ta ga i ns tt hewi ndowpa ne . I tf l i e st ot hel e f t , t he nt ot her i ght . Youknowwhe r ei ti sj us tbyl i s t e ni ng. Buthow? et wome t hodsofdi s c e r ni ngs pa c i a l i s a t i on:I nt e ns i t ya ndTi mi ng. Weus

As ounds our c et ot hel i s t e ne r ’ sl e f ti sc l os e rt ot hel e f te a r . The r e f or et he s oundi sl oude ri nt hel e f te a rt ha ni ti si nt her i ght . Thi si sc a l l e d: I nt e r a ur a lI nt e ns i t yDi f f e r e nc e( I I D) Thes oundt r a ve l sas hor t e rdi s t a nc et ot hel i s t e ne r ’ sl e f te a r , s oi ta r r i ve s t he r ef i r s t . Wes e eD1i ss hor t e rt ha nD2 . Thi si sc a l l e dI nt e r a ur a lTi meDi f f e r e nc e( I TD)


s s s s s . . . . . .

Sna ke ss me l li nt hes a mewa yt ha twehe a r . The yus et he i rt ongue st ot a s t et hea i r .The yha vea “ f or ke dt ongue ”whi c hha st wodi f f e r e nts e ns or s-j us t l i keourt woe a r s . I ft he r ei sas me l li nt hede s e r t , t hes na keknowswhi c h di r e c t i on i ti sc omi ng f r om be c a us et he s me l li s s t r onge rononef or kt ha nt heot he r . Weus et hi ss a me“ I nt e ns i t y Di f f e r e nc e ”t o he a ri f s ome t hi ngi sonourl e f torourr i ght .


s o how d o wehe a r i nf r on ta n db ehi n d ? Tr yc uppi ngyourha nda r oundyoure a r , l i kei nt hi spi c t ur e . Wha tdoyounot i c e ? Eve r yt hi ngbe c ome ss l i ght l yl oude r-e s pe c i a l l yhi ghf r e que nc i e s . Thi si sbe c a us et hePi nna( t hes he l l l i keout e re a r )a c t sl i kea s a t t e l i t edi s ha ndc a t c he spa s s i ngs oundwa ve s , t he nr e f l e c t st he m i nt oyoure a r .Whe nyouc upyourha nda r oundyoure a r ,t hi s e f f e c t i ve l yma ke st hePi nnamuc hbi gge ra nde xa gge r a t e st he e f f e c t . hi sonl ywor ksf ors oundswhi c ha r ei nf r ontofyou.Sound Butt t ha tc ome sf r om be hi nd goe spa s tyoure a r swi t houtbe i ng r e f l e c t e dbyt hePi nna ,a ndt he r e f or es ounds‘ dul l ’-wi t hf e we r hi ghf r e que nc i e s . Aswemoveourhe a dsa nd he a rhow t hes ound c ha nge s ,i t be c ome sc l e a ri ft hes oundc ome sf r om i nf r ontorbe hi nd.


Ac a veorac u p b oa r d ?


g oodvi b r a t i on s Ass oundwa ve smovet hr ought hea i r( pr opoga t e ) t he yi nt e r a c twi t he ve r yt hi ngt he yt ouc h. The ybounc eof fwa l l sa ndbe ndt hr ougha l l e ywa ys , a nd t r a ve li na l ldi r e c t i onsunt i lt he yr un outof e ne r gya ndc a nnol onge rbehe a r d. Thi sha ppe nsi nt hr e es t e ps : -di r e c ts ound -e a r l yr e f l e c t i ons -r e ve r be r a t i on


homewor k Re r e a dt he s enot e sa ndma kes ur eyouunde r s t a ndhow wel oc a t es ounds-t i mea ndi nt e ns i t ydi f f e r e nc e sbe t we e n t hee a r s . Cont i nuet ol i s t e nt os oundsi nt hee nvi r onme nt . Howi s as ounddi f f e r e ntwhe ni ti sbe hi ndyou?Whydoyour f oot s t e pss ounddi f f e r e ntwhe nyouwa l kt hr ougha t unne l ?Ca nyougue s st hes i z eoft her oom us i ngonl y yourhe a r i ng?

Week 2  

Music Technology | Hearing in 3D - IID / ITD, Direct Sound, Early Reflections & Reverb

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