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LABORATORIO LABORATORIO DE DE FÍSICA FÍSICA BÁSICA II LAB. FIS. 102 INFORME #9
MEDIDA DE RUIDO Docente:
In). $"n C",%(s /",)"s
Estudiantes:
D$",te M"n"n( E,%"n A,ie% Rie,( e3" (s4 e&,( /ei")" C"%"n5" A%e6
Fecha:
297117201!
Gestión II201!
!
MEDIDA DE RUIDO OBJETIVOS.•
•
An"%i", e% (-+(,t"-ient( &e% nie% s(n(,( en 8$nión &e% tie-+( en &istint(s "-ientes &e% "-+$s $nie,sit",i(: UMSS. Dete,-in", e% nie% s(n(,( e;$i"%ente Leq +"," $n +e,i(&( &e tie-+(.
FUNDAMENTO TEÓRIO.-
DATOS ! "#U#OS.Fecha de$ Re%ist&o de Datos: 22 &e n(ie-,e &e 201! 'o&a de Re%ist&o: 09<00 ".-.
Li [ dB ] Li [ dB t [ s ] t [ s ] n N 10 >! 1 4 ?10 >1 1 20 >? 2 4 ?20 !0 >1 3 >1 2 ?0 >2 4 ($cu$o 4 ?!0 @0de$ ni)e$>2sono&o e*ui)a$ente: 5 >0 3 0 >! 6 L 4 ??0 >0"%$%"-(s 9 7 ,i-e,( "&" $n(9&e %(s 10 +"," 10 4 =0 >? 0 "%(,es &e Li 4 ?@0 90 >0 8 5 100 1 L n >1 ?0 14 9 >1 Leq =10∗ log ∑ 10 10 n 6i=1 110 >1 11 4 ?>0 120 1 = > 7 2 1 4 ?=0 1!0 Leq =10∗log 120 2370140265 1 >2 >0 0 3 4 ?90 1?0 1 L >2 9 eq =10∗log [ 19751169 ] 8 4 5 @00 1 L =1@0 >= 72.955928≈> 73 eq 9 5 5 @10 10 1 >! +R"FIOS.>2 1 6 5 @20 1>0 1 >2 EUAIONES.> 2 7 5 @!0 1=0 1 n>9 L = 3 0 Leq =10∗log 1 ∑ 10 10 n i=1 5 @?0 190 1 >1 >! 4 8 5 @@0 200 I 2 >0 9 L=10∗log 5 9 I 0 5 @0 210 2 > = 6 1 RESU#TADOS.5 @>0 220 2 >! = 7 2 Es,ii, e% "%(, &e< 5 @=0 2!0 2 >? >1 3 Fecha de Re%ist&o: 0 22 &e 5 @90 2?0 2 >2 n(ie-,e >?&e 201!. 8 4 6 00 2 2@0 >2 C(%ise( #u%a& de>@ Re%ist&o: 9 5 M$%ti&e+(,ti( UMSS. 6 10 20 2 >! >@ 6 Du&aci,n de$ &e%ist&o1de datos: 20 6 20 2>0 2 >@ -in$t(s. >? 2 7 6 !0 2 2=0 >? 10 Inte&)a$o=2 de Tieos:3 0 se)$n&(s. 6 ?0 290 2 >? >1 8 N/e&o de Datos: 4 120 6 @0 !00 3 >! >9 5 9 6 0 !10 3 >2 >2 6 1 6 >0 !20 3 >@ >@ 7 2 6 =0 !!0 3 i
[
[
[
( )
i
]
i
]
]
n 01 02 03 04 05 06 07 00 08 89 81 82 83 84 85 86 87 80 88 19 9 19 1 19 2 19 3 19 4 19 5 19 6 19 7 19 0 19 8 119 111 112 113 114 115 116 117 110 118 12
t [ s ]
=10 =20 =!0 =?0 =@0 =0 =>0 ==0 =90 900 910 920 9!0 9?0 9@0 90 9>0 9=0 990 1000 1010 1020 10!0 10?0 10@0 100 10>0 10=0 1090 1100 1110 1120 11!0 11?0 11@0 110 11>0 11=0 1190 1200
Li [ dB ]
>0 >! >1 >? >1 >? >0 >2 >! >? >0 >@ >1 >0 >! >@ = = >? >! >1 >? > >@ >@ >0 ? = = = @ ? >1 = >1 9 = >
!?0 3 > 4 !@0 3 >? 5 !0 3 9 6 Leq =73 Ni)e$ Sono&o E*ui)a$ente: !>0 3 >2 7 UESTIONARIO.!=0 3 >0 0 1. ;u< intensidad I = co&&esonde a$ u>&a$ de do$o&= e$ cua$ es de !90 3 129 dB? = 8 ?00 4 L" intensi&"& >? -6i-": +"," e% $-,"% &e% &(%(, &e% (*&( 5$-"n(: ;$e es 9 120 &B: tiene $n "%(, 1 [ W / m ] 2
2. Un inst&uento usica$ tiene una intensidad de I =10− [ W / m ] , si se du$ica $a intensidad= a@adiendo ot&o inst&uento usica$ de $a isa intensidad. E$ ni)e$ de intensidad sono&a se du$ica&(?= caso cont&a&io= u($ se&a e$ ni)e$ de intensidad sono&a? 5
2
N( se &$+%i" s$ nie% &e intensi&"& s(n(,": es< L=10∗log
L=10∗log
() () I 1 I 0
I 2 I 0
I 2 =2∗ I 1
(
L=10∗ log
2∗ I 1 I 0
)
=10∗log
(
−5
2∗(10
−12
10
)
)
L=73.01 [ dB ]
N(t"< I 0 =10−12 [ W / m2 ]
3. uat&o uentes sono&as &oducen ni)e$es de intensidad sono&a de 60= 77= 01 C 05 dB o& sea&ado. A$ %ene&a& $os sonidos siu$t(neaente= $as intensidades de $as uentes se suan Ca *ue $as ases &e$ati)as a $as ondas &oducidas )a&an a$eato&iaente= C o& tanto= no se &oducen en,enos de inte&e&encia. u($ se&( e$ ni)e$ de intensidad sono&a cuando $as t&es uentes act/an siu$t(neaente? L=10∗log
( ) I I 0
L=10∗log
(
I 1+ I 2 + I 3 + I 4 I 0
)
I = I 1 + I 2+ I 3 + I 4
(
L=10∗ log
I 1+ I 2 + I 3 + I 4 I 0
)
=10∗log
(
68 + 77 + 81 + 85 − 12
10
)
L=144.928 [ dB ]
ON#USIONES.Se %(),ó &ete,-in", e% (-+(,t"-ient( &e% nie% s(n(,( &ent,( %" $nie,si&"& ' se (se,ó ;$e e% nie% s(n(,( "% ;$e 5"it$"%-ente est"-(s e6+$est(s en +,(-e&i(: ;$e es &e es $n nie% "%t( +"," n$est," "+"i&"& &e "$&iión (n ,es+et( "% tie-+( en e% ;$e est"-(s e6+$est(s en &i5( %$)", %( ;$e +$e&e %%e)", " "$s", $n &"3( " n$est," s"%$&.
REOMENDAIONES. $e %" +e,s(n" ;$e est s$et"n&( e% s(nó-et,( %( -"nten)" "%e"&( &e si
' n( %( "+('e (nt," s$ $e,+(. $e $n" +e,s(n" &i8e,ente " %" ;$e s$et" e% s(nó-et,( se en",)$e &e %ee, %(s &"t(s &e% s(nó-et,( +"," ;$e %" +e,s(n" ;$e %( s$et" +$e&" e,i8i",%(. T,"t", &e -"ntene,se en $n %$)", 8i( +"," %" t(-" &e &"t(s.
BIB#IO+RAFA.• • • •
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