International Standard (@ 7574/2 0 1 4 4gB INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*MEMIYHAPOnHAR OPrAHH3AUHR fl0 CTAH~APTH3AUMH ORGANlSATlON INTERNATIONALE DE NORMALSATION Acoustics Statistical[.]
Trang 1INTERATIO NAL OR GAIZATIO N FOR STANDARDIZ ATIO N*MEMIYAPOnHR O PrAH3AH fl0 C TA~ATH3AMH.O R GAlS ATlO N INTER ATIO NAL E D NORMALSATIO N
Aco stq e - M& hoe stetstqe p ur Ia d terminato et Ie cotr& le de valeurs dclarbe d’bmis io a ostqe de
ma hine et kuipements - Parte 2 : Mkth de p ur valeurs d& lar& es de ma hine in ivid ele
Fir st e itio - 19 5-12-15
iG
F2
Ref No ISO 7 7 / 2-19 5 (EI
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7
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Decriptors : ao stic, ma hin ry, n is k ou d), statisticl q alty c ntol statistic l a alyis
2
R
0
Trang 2ISO (he internatio al Organiz tio for Stan ardiz tio ) is a w orldwide federatio of
natio al Stan ards b die (ISO member bedie ) T e w ork of preparin Internatio al
Stan ards is n rmaly c ried o t thro g ISO te h ic l commite s Es h member
b d intere ted in a su je t for which a te h ic l com ite ha be n e tablshed ha
the rig t to be repre ented o that commite Internatio al organiz tio s, g vern-
mental an n n-g vernmental in laiso with ISO, also tak e par- in the work
Draf Internatio al Stan ards ad pted b the te h ic l com ite s are circulated to
the member b die for ap ro al before their a c ptanc a Internatio al Stan ards b
the ISO Co nci T hey ar e ap ro ed in a cordanc with ISO proc d re req irin at
le st 75 % ap ro al b the member b die v tin
Internatio al Stan ard ISO 7574/2 wa prepared b T ech ic l Com ite ISO/T C 4 ,
Aco stc
Us rs sh uld n te that al Internatio al Stan ards u derg revisio from time to time
an that an referenc made herein to an other Internatio al Stan ard imple its
late t editio u le s otherw is stated
0 Internatio al Organk atio for Stan ardk atio , 19 5 l
Trang 3Acoustics
0 Intr od ctio
A general intro uctio to the fo r-part s rie of ISO 7574 is
given in ISO 7574/1
F r the p rp s s of this part of ISO 7574, the term “labeled
value Stan s for al k in s of state vlu s (e.g informatio o
a label the u per n is lmit s t b an auth rity, the agre d
co tra t value) for which the meth ds may be ap led
T he meth ds de cribed in this part of ISO 7574 are of a
statistic l nature o ly in a re tricted s ns Statistic l view-
Points are relevant mainly when e timatin the value of K ( e
claus 5)
T is part of ISO 7574 pro ide g idelne for determinin the
labeled value of the n is emis io s of in ivid aly-labeled
ma hinery an eq ipment, that is, in the Situatio in which
e ch ma hine pro uc d ha its own in ivid aly-labeled value
of its n is emis io q ahtity It also spe ifie a meth d for
verifyin complanc of the n is emis io of an in ivid al
ma hine or item of eq ipment with its labeled value
T is part of ISO 7574 d e n t de l with the co s q enc s that
ensue if the stated value is n t co firmed a verified for a Sin le
ma hine
2 Ref ere c s
ISO 3741, Aco stc - Determinato of so n p wer levels of
n is so rcs - Preisio meth ds for broad-ban sorc s in
reverberato ro ms
ISO 374 , Aco stc - Determinato of so n p wer levels of
n is sorc s - Pre isio meth ds for dis rete-feq ency an
narow-ban sorc s in reverberato ro ms
ISO 374, Aco stc - Determinato ofso n p wer levels of
n is so rc s - En ine rin meth ds for spe ial reverberato
te t roms
ISO 374 , Acostc - Determinato ofso np wer levels of
n is so rc s - Eninerin meth ds for fe-field co di o s
oer a refletn plane
ISO 3745, Acostc - Determinato of so np wer levels of
nis sorcs - Preisio meth ds for aneh ic an s mi
ane h ic ro ms
ISO 374 , Aco stc - Determinato of so n p wer levels of
nis so rc s - Survey meth d
ISO 471, Aco stc - Nois labeln of ma hinery an
eq ipment
ISO 75741 , Aco stc - Statstc l meth ds for determinin
an verifyin stated n is emis io value of ma hinery an
eq ipment - Part 1: General co siderato s an definio s
ISO 757414, Aco stc - Statstc l meth ds for determinin
an verifyin stated n is emisio value of ma hinery an
eq ipment - Part 4: Meth ds for stated value for batche of
mahine
3 De nitio s
F r the p rp s s of this part of ISO 7574, the definitio s given
in ISO 75741 ap ly
4 Ge er al
When che k in complanc of a ma hine with its in ivid aly-
labeled value, this part of ISO 7574 work s o the principle that
the labeled value in ic te the lmit below which the n is
emis io value of the ma hine le
NOT E - In the ap lc tio of this part of ISO 7574, it is a sumed th t
al mes reme ts wi b p rorme b a te tin la oratory whic h s
a pro riate tet fa i tie ad tain d staff
Trang 45 Guide line s for th d termin tio of th
As the determinatio of the labeled value is the sole re p n-
sibi ty of the labeler, this claus is given for g idanc o ly
T e me sured value (or the me n of s veral me sured value )
for the in ivid al ma hine is de ig ated L” an shal be deter-
mined in a cordanc with the spe ific me surement te t co e
f or the spe ific famiy of ma hine (T e a terisk in the Symb l
is us d here to diferentiate betwe n me surements in co -
f ormity with this claus an th s in co formity with claus 6.)
NOT ES
1 If sc a s eific me s reme t tet c d d e n t e ist, th
meth d s eifie in ISO 341, ISO 34, ISO 34, ISO 37 44 a d
ISO 341) ma b u e if th in talatio ad o eratin c n itio s
ty ic l for n rmal u e ar e clerly state or a r ee
2
If th s eific mes reme t tet c d for th famiy of mahin s
pro id s more th n o e mo e of Op ratio in n rmal u e, th mo e
Vieldin th hig e t v lu of L” or th mo e a r ee u o in th rel-
e at mahin ry in u ty or in th c nta t s o ld b ue to d ter
min L.c T he in taiatio ad o eratin c n itio s a d th mes re-
me t tet c d ue s o ld b clerly state
T e labeled value, L, for the ma hine may be determined b
L, > L* + K
T e value of K in the ab ve eq atio shal be Ch s n to a -
co nt for the ran om me surement erors oc urin u der
repro ucibi ty co ditio s (s c 3.17 of ISO 75741 ) An ap-
pro riate value may be determined b multiplyin the Stan ard
deviatio of repro ucibi ty, oR, b the q antie, u a, for the
de ired pro abi ty of a c ptanc , P, from table 7 in
ISO 7574/4 A value of K = 3 dB is ap ro riate in man c s s
ha
= 1,6 5 for P, = 9 %; oR = 1,8 dB) an is given for
g idanc
NOT E - If th state vlu is o ly rele a t for o e c ntat, for e am-
ple, a d is (ac rdin to this c nta t to b v rifie in th te tin
la oratory e t site of th la eler, K ma b Ch sn b th la eler to
ac u t o ly for th v ria i ty of th me s reme t v lu s u d r
re e ta i ty c n itio s (sc 3.16 in ISO 77/1) If it is to b v rifie in
a difere t ta oratory , th vria i ty of mes reme t vlu s u d r
re ro u ibi ty c n itio s hs to b tak en into ac u t wh n d ter
minin K Ex erie c g ind in th p st with simiar mahins a d with
difere t tetin la oratorie/ t st site wi u u ly b h lpful wh n
d terminin K
in iv id al ma hin
Complanc is che k ed with a me surement made in a -
cordante with the spe ific me surement te t co e for the
spe ific famiy of ma hine or, if n such co e exists, in a cor-
danc with ISO 3741, ISO 374 , ISO 374 , ISO 374 or
ISO 374 (s c fo tn te to claus 51, usin the s me instalatio
me sured value L, o tained in a cordanc with the te t Co e,
an which shal n t be ro n ed, is compared with the labeled
value L,
T e rule g vernin the de isio shal be a folows:
if L < L, the labeled value is co firmed a verified for the
Sin le ma hine;
if L > L, the labeled value is n t co firmed a verified for
the Sin le ma hine
T e spe ific me surement te t co e for the spe ific famiy of
ma hine , or, if n such co e exists, ISO 3741, ISO 374 ,
ISO 374 , ISO 374 or ISO 374 , an the instalatio an
o eratin c n itio s u e s al b state
NOT E - F r th p rp ss of this p r of ISO 77, it is n t u u ly
nc sary to draw u a s e ial n is la el n c d for th s eific
famiy of ma hin s (sc ISO 47 1 a d ISO 77/4)
1) This d e n t prelu e th u e of oth r Intern tio al Sta drd , e.g ISO 3 4 6, whic ma form th b sis of th s eial me s reme t te t Co e