Acoustics Report - Copy.pptx

7/24/2019 Acoustics Report - Copy.pptx

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INTRODUCTION TOHEARING

ELLYSA CHARISE M. QUIROS


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HEARING - is the ability to pe!ei"e so#$% by %e

"ibatio$s. - So#$% 'ay be hea% tho#&h soli%( lio &aseo#s 'atte.

- It is o$e o* the ta%itio$al +"e se$ses

- happe$s tho#&h a$ o&a$ ,hi!h is t

- So'e o&a$is's ae able to hea #lt

a$%o i$*aso#$%.


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HEARINGSo'e bats #se #ltaso#$% *o e!ho lo!

,hile i$ i&ht.

Do&s ae able to hea #ltaso#$%( ,hipi$!iple o* /sile$t/ %o& ,histles.


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HEARINGS$a0es se$se i$*aso#$% tho#&h thei

thee is e"i%e$!e that ,hales a$% ele'ay #se it *o !o''#$i!atio$.


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HEARING


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HEARINGThe heai$& !a$ be teste% #si$& a %e"i!e o!o'p#te po&a'. A$ 'a!hi$e #se% *o e"al#ati$& heai$& loss. Thsta$%a% e)#ip'e$t at a$% i$ a#%iolo&y !e$tes. They #s#ally !o$sise'be%%e% ha%,ae #$it !o$$e!te% to a pai

hea%pho$es a$% a test s#b1e!t *ee%ba!0 b#t

audiometer ENT (ear, nose,

throat)


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TRI2IASThe 'a1oity o* i$%i"i%#als s#3ei$& *o' heaae #$%e the a&e o* 45.

The $#'be o$e !a#se o* heai$& loss is e6pe6!essi"ely lo#% so#$%s 785 %e!ibels o hi&h

Yo# eas $e"e stop heai$&( e"e$ ,he$ yo#

Yo# bai$ 1#st i&$oes i$!o'i$& so#$%s.


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Re*ee$!es: http:,,,.heai$&ai%s.!o'abo#t-heai$&-lossh

hea;


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SOUND WAVESSULIT( Da$a Alyssa D.CAR;55 >R?


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SOUND WAVES

Soundis a seies o* lo$&it#%i$al o

!o'pessio$ ,a"es that 'o"e tho#&h aio othe 'ateials. So#$% %oes $ot ta"el i$a "a!##'.

Li0e a$y ,a"e*o'( so#$% has the!haa!teisti!s o* wavelength,freuen!", am#litude a$% s#eed ovelo!it". So#$% ,a"es ae !eate% by the"ibatio$ o* so'e ob1e!t( li0e the !o$e i$ aa%io lo#%spea0e. The ,a"es ae %ete!te%,he$ they !a#se a %ete!to to "ibate.


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SOUND WAVES

Travels through matter

So#$% ,ill ta"el tho#&h 'a$y 'ateials( s#!has ,ate a$% steel. So'e i$s#lati$& 'ateialsabsob '#!h o* the so#$% ,a"es( pe"e$ti$&the ,a"es *o' pe$etati$& the 'ateial. Sound is a longitudinal wave

The api% ba!0-a$%-*oth "ibatio$ o* a$ ob1e!t

!eates the lo$&it#%i$al o !o'pessio$ ,a"eso* so#$%.


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AM@LITUDE>UILDING UTILITIES

DE LA LUNA( MARGARETTE A

?


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AM@LITUDE 'eas#es ho, *a a ,a"e ises a$%

*alls.

A ,a"e/s am#litudeis %e+$e% as hal*the %ista$!e *o' its hi&hest poi$t toits lo,est poi$t.

Am#litudeis popotio$al to thee$e&y o* a ,a"e( a hi&h e$e&y ,a"eha"i$& a hi&h a'plit#%e a$% a lo,e$e&y ,a"e ha"i$& a lo, a'plit#%e.


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AM@LITUDEI'a&i$e a ,a"e i$ the o!ea$.

It !o#l% be a LITTLE ippleo a GIANT ts#$a'i.

hat yo# ae a!t#ally seei$& ae

,a"es ,ith %i3ee$t a'plit#%es.They 'i&ht ha"e the e6a!t

sa'e freuen!"a$% wavelength(b#t the am#litudeso* the ,a"es !a$be "ey %i3ee$t.


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AM@LITUDETheam#litudeo* a ,a"e is

'eas#e% as:

;. The hei&ht *o' the e)#ilibi#'poi$t to the hi&hest poi$t o*a!restor

?. The %epth *o' the e)#ilibi#'poi$t to the lo,est poi$t o*atrough


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AM@LITUDE he$ yo# 'eas#e the a'plit#%e

o* a ,a"e( yo# ae eally loo0i$& atthe e$e&y o* the ,a"e.

It ta0es 'oe e$e&y to 'a0e abi&&e a'plit#%e ,a"e.

A$yti'e yo# $ee% to e'e'bethis( 1#st thi$0 o* a ho'e steeoFsa'pli+e it 'a0es the a'plit#%eo* the ,a"es bi&&e by #si$& 'oeele!ti!al e$e&y.


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A2ELENGTH Wavelengthis a popety o* a ,a"e that

'ost people 7o$!e they 0$o, ,hat toloo0 *o9 !a$ spot )#i!0ly a$% easily( a$%#se it as a ,ay o* telli$& ,a"es apat.

A$y o* the pats o* the ,a"e that aepoi$ti$& #p li0e 'o#$tai$s ae !alle%!rests. A$y pat that is slopi$& %o,$

li0e a "alley is a trough. Wavelengthis %e+$e% as the %ista$!e

*o' a pati!#la hei&ht o$ the ,a"e tothe $e6t spot o$ the ,a"e ,hee it is atthe sa'e hei&ht a$% &oi$& i$ the sa'e%ie!tio$


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Ho, is the E$e&y Ta$spote% Reto the A'plit#%e

The a'o#$t o* e$e&y !aie% by a,a"e is elate% to the a'plit#%eo*the ,a"e.

A hi&h e$e&y ,a"e is!haa!teie% by a hi&h a'plit#%eJa lo, e$e&y ,a"e is!haa!teie% by a lo, a'plit#%e.

The a'plit#%e o* a ,a"e e*es tothe 'a6i'#' a'o#$t o*%ispla!e'e$to* a pati!le o$ the'e%i#' *o' its est positio$.


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The lo&i! #$%elyi$& the e$e&y-a'plit#%e

elatio$ship is as *ollo,s: I* a sli$0y is stet!he% o#t i$ a hoio$tal

%ie!tio$ a$% a ta$s"ese p#lse is i$to%#!e%i$to the sli$0y( the +st !oil is &i"e$ a$ i$itiala'o#$t o* %ispla!e'e$t. The %ispla!e'e$t is%#e to the *o!e applie% by the peso$ #po$ the!oil to %ispla!e it a &i"e$ a'o#$t *o' est.The'oe e$e&y that the peso$ p#ts i$to thep#lse( the 'oe ,o0 that heshe ,ill %o #po$the +st !oil.The 'oe ,o0 that is %o$e #po$the +st !oil( the 'oe %ispla!e'e$t that is&i"e$ to it.The 'oe %ispla!e'e$t that is &i"e$to the +st !oil( the 'oe a'plit#%e that it ,illha"e.


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So i$ the e$%(

the a'plit#%e o* a ta$s"ese p#lseis elate% to the e$e&y ,hi!h thatp#lse ta$spots tho#&h the 'e%i#'.

@#tti$& a lot o* e$e&y i$to a

ta$s"ese p#lse ,ill $ot e3e!t the,a"ele$&th( the *e)#e$!y o thespee% o* the p#lse. The e$e&yi'pate% to a p#lse ,ill o$ly a3e!t thea'plit#%e o* that p#lse.


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E$e&y-A'plit#%e Mathe'ati!Relatio$ship

The e$e&y ta$spote% by a ,a"e is%ie!tly popotio$al to the s)#ae o*the a'plit#%e o* the ,a"e. Thise$e&y-a'plit#%e elatio$ship isso'eti'es e6pesse% i$ the *ollo,i$&'a$$e. $A%&E% A'$

KMORE SE2EREKMORE ENERGY


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The a'plit#%e o* a li&ht/s ,a"e isi'pota$t be!a#se it tells yo# abo#t

the intensit" or *rightnesso* the li&htelati"e to othe li&ht ,a"es o* the sa'e,a"ele$&th. It/s a 'eas#e o* ho, '#!he$e&y the ,a"e !aies.

So( i* the li&ht *o' Sta A is bi&htetha$ the sa'e type o* li&ht *o' Sta >(yo# 0$o, that the li&ht yo# see *o'Sta A has the la&e a'plit#%e. Its "eyi'pota$t to $ote that ,hile a'plit#%e&i"es yo# i$*o'atio$ abo#t the i$te$sity

o* the li&ht( it is the ,a"ele$&th( $ot thea' lit#%e that tells o# ,hat 0i$% o*

I'pota$!e o* A'plit#%


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%emem*er,

Wavelengthtells "ou thetype of l

And,

Amplitudetells "ou a*out theinten

of the light


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%E-UEN./

LANDICHO JR., VICHAEL H

AR155/BR


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Frequency

Frequencyis the number of occurrences of a repeating event per unit time.

It is also referred to as tempr!" #requency, which emphasizes the contrast

to spatial frequency and angular frequency.

Frequency describes the number of waves that pass a fixed place in a given

amount of time. So if the time it taes for a wave to pass is!"# second, the

frequency is # per second. If it taes !"!$$ of an hour, the frequency is !$$

per hour.

%he per$%is the duration of time of one cycle in a repeating event, so the

period is the reciprocal of the frequency.

https&""upload.wiimedia.org"wiipedia"commons"'"'("Frequency)n


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&un%

Frequency is the property of sound that most determines pitch.

%he frequencies an ear can hear are limited to a specific range of

frequencies.

%he audible frequency range for humans is typically given as being between

about #$ *z and #$,$$$ *z +#$ *z, though the high frequency limit usually

reduces with age. -ther species have different hearing ranges.

http&""www.animatedimages.org"imganimatedbatimage$$/0'$01


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2efinitions

In physics, !n'u"!r #requency3 +also referred to by the terms !n'u"!r(pee%, r!%$!" #requency, c$rcu"!r #requency, r)$t!" #requency,r!%$!n

#requency, and pu"(!t!nce is a scalar measure of rotation rate.

https&""upload.wiimedia.org"wiipedia"commons"c"c(")ngularFrequency.gif


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2efinitions

In mathematics, physics, and engineering, (p!t$!" #requencyis acharacteristic of any structure that is periodic across position in space.

http&""ucalgary.ca"pip/0("mod4"spatial"frequency!


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2efinitions

*$tc+is a perceptual property of sounds that allows theirordering on a frequencyrelated scale, or more

commonly, pitch is the quality that maes it possible to

5udge sounds as 6higher6 and 6lower6 in the sense

associated with musical melodies.

http&""imgur.com"owz78F


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9ange of Frequencies

https&""upload.wiimedia.org"wiipedia"commons"c"c4")thbyage.png


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:aves

http&""www.qrg.northwestern.edu"pro5ects"vss"docs"communications"!whatisfrequency.html


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-ther Species

http&""hypertextboo.com"facts"#$$/"%im;ondon.shtml


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9eferences

https&""en.wiipedia.org"wii"Frequency


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%e!ibels

Decibel


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Decibel

The de!i*el7abbe"iate% d09 is the #$it #se% to 'eas#e the i$te$o* a so#$%.

O$ the de!i*el s!ale( the s'allest a#%ible so#$% 7$ea total sile$!is < %>. A so#$% ;< ti'es 'oe po,e*#l is ;< %>. A so#$% ;. A so#$% ;(


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All o* the pe"io#s ati$&s ae ta0e$,hile sta$%i$& $ea the so#$%.

Dista$!e a3e!ts thi$te$sity o* so#$% -- i*is *a a,ay( the po,e

&eatly %i'i$ishe%


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A$y so#$% abo"e 85 %> !a$ !a#seheai$& loss( a$% the loss is elate%

both to the po,e o* the so#$% as ,ellas the le$&th o* e6pos#e. Yo# 0$o,that yo# ae liste$i$& to a$ 85-%> so#$%i* yo# ha"e to aise yo# "oi!e to behea% by so'ebo%y else. Ei&ht ho#s o* so#$% !a$ !a#se %a'a&e to yo#easJ a$y e6pos#e to ;B so#$%!a#ses i''e%iate %a'a&e 7a$% !a#sesa!t#al ai$ .


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REERENCES: http:s!ie$!e.ho,st#3,o0s.!o')#estio$;?B.ht' http:,,,.%a$&eo#s%e!ibels.o&e%#!atio$i$*o'atio$-!e$te

!ibel-e6pos#e-ti'e-i%eli$es

http:,,,.&!a#%io.!o'eso#!esho,toslo#%$ess.ht'l https:e$.,i0ipe%ia.o&,i0iDe!ibel
http://science.howstuffworks.com/question124.htmhttp://www.dangerousdecibels.org/education/information-center/decibel-exposure-time-guidelines/http://www.dangerousdecibels.org/education/information-center/decibel-exposure-time-guidelines/http://www.dangerousdecibels.org/education/information-center/decibel-exposure-time-guidelines/http://www.gcaudio.com/resources/howtos/loudness.htmlhttps://en.wikipedia.org/wiki/Decibelhttps://en.wikipedia.org/wiki/Decibelhttps://en.wikipedia.org/wiki/Decibelhttp://www.gcaudio.com/resources/howtos/loudness.htmlhttp://www.gcaudio.com/resources/howtos/loudness.htmlhttp://www.dangerousdecibels.org/education/information-center/decibel-exposure-time-guidelines/http://www.dangerousdecibels.org/education/information-center/decibel-exposure-time-guidelines/http://www.dangerousdecibels.org/education/information-center/decibel-exposure-time-guidelines/http://science.howstuffworks.com/question124.htmhttp://science.howstuffworks.com/question124.htm


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MEASUREMENT 2S.@ERCE@TION


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MEASUREMENT OSOUND


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HO DO EMEASURE

SOUNDA2ES


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So#$% e$e&y ta"els i$ ,a"ea$% is 'eas#e% i$ *e)#e$!ya$% a'plit#%e.


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A'plit#%e 'eas#esho, *o!e*#l the ,a"eis.

It is 'eas#e% i$%e!ibels o %>A o*

so#$% pess#e.

< %>A i th *t t l l th t


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< %>A is the so*test le"el that a peso$ !ahea.

N l 0i i


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No'al spea0i$& "oi!es aeao#$% 45 %>A.

A 0 t b b t ;


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A o!0 !o$!et !a$ be abo#t ;%>A.

e)#e$! is 'eas#e%


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e)#e$!y is 'eas#e%i$ the $#'be o* so#$%

"ibatio$s i$ o$ese!o$%.

A healthy ea !a$ hea

so#$%s o* "ey lo,*e)#e$!y( ?< Het 7o?< !y!les pe se!o$%9(to a "ey hi&h


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The lo,est A 0ey o$

the pia$o is ? Het.The 'i%%le C 0ey o$ apia$o !eates a ?4?

Het to$e. The hi&hest0ey o$ the pia$o isB;84 Het.


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@ERCE@TION OSOUND


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HO CAN E@ERCEI2E

SOUND


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The st#%y o* so#$% pe!eptio$ is!alle% #s"!hoa!ousti!s. A$y ti'e peophea o *eel a so#$%( thee ae so'e a'thi$&s that happe$.

SIP QUALITIES O SOUND


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SIP QUALITIES O SOUND@ERCE@TION

it!h- 7also asso!iate% ,ith *e)#e$!ythe pe!eptio$ o* a hi&h o lo, so#$%.

$oudness- 7also !alle% a'plit#%e9( thi$te$sity o* a so#$%.

hase- the i$!ease a$% %e!ease i$pess#e !y!le a$y si$&le "ibatio$.

SIP QUALITIES O SOUND@ERCE@TION


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@ERCE@TION

Dire!tion - 7heai$& ,ith t,o ea

!eates le*ti&ht( hi&hlo,(*o$tba!0 )#alities9( +st !o'e+st hea% by o$e ea o the othe

Distan!e - 7also asso!iate% ,ith

e"ebeatio$ ti'e9( pe!eptio$ oho, $ea o *a a,ay a so#$%/sso#!e is.

Tim*re - 7also !alle% to$e !olo9the pe!ei"e% )#ality o* a$y

/

HAT IS @ITCH@it h i th t % t


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@it!h is the te' #se% to%es!ibe the psy!holo&i!alse$satio$ o pe!eptio$ o* a

so#$% by people.It is so'eti'es !o$*#se% ,ith

*e)#e$!y( the te' #se% to%es!ibe the physi!al

phe$o'e$a o* so#$% e$e&y!eate% by a seies o* "ibatio$s.

A s!ie$!e te' *o "ibatio$s pese!o$% is Het( abbe"iate% H.

This te' is $a'e% a*te the


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http:,,,.%a$&eo#s%e!ibels.o&"it#ale6hibit4'eas#i$&so#$%.h

http:hypephysi!s.phy-ast.&s#.e%#hbaseso#$%pit!h.ht'l

http:,,,.!a*e'#se.!o'0it!he$pe!eptio$si6=)#alities.ht'

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Acoustics Report - Copy.pptx