INTERNATIONAL STANDARD IS0 9053 First edition 1 991 07 01 Acoustics Materials for acoustical appl ications Determination of airflow resistance Acoustique Ma t&iaux pour appl ications de la r&istance 2[.]
I S0 I N TE RN ATI ON AL S TAN D AR D 53 Fi rs t ed i ti o n 991 - 07-01 Aco u sti cs - M ate ri al s appl i cati o n s - for aco u sti cal D e term i n ati o n of rfl o w resi stan ce Aco u s ti q u e de la - r&i s tan ce Ma t&i au x pou r I ’ ko u l e m en t appl i cati o n s de aco u s ti q u e s - D te rm i n a ti o n /‘ r Referen ce I S0 9053: n u m ber 99 (E) I S0 90 53 : 99 (E ) Fo reword I S0 ( th e I n te rn ati o n al fe d e rati o n of of p re p ari n g a te ch n i cal re p re s e n te d m e n tal an d I S0 I n te rn ati o n al to cas ti n g I n te rn ati o n al I S O/TC or A i s0 an y pe rm i ssi o n h as ad o pte d by fo r I S O, al s o I n tern ati o n al by ap pro val th e vo ti n g at a wo rk I S0 s u bj e ct th e ri g h t o rg an i z ati o n s , e l e ctro te ch n i cal bod i es re q u i re s fo r to be g o ve rn - take p art in th e E l e ctro te ch n i cal s tan d ard i z ati o n te ch n i cal co m m i ttees P u bl i cati o n l e as t 75 % as of th e an are l n te r- m em ber I S0 9053 was p re p are d by Te ch n i cal C o m m i ttee Aco u s ti cs th i s I n te rn ati o n al re se rved m e an s, in l n tern ati on a Case P ri n ted ii of in Th e th ro u g h S tan d ard is fo r i n fo rm ati o n o n l y 991 ri g h ts by of m atte rs wi th th e ou t i n te re s te d e s tabl i s h e d l i s o n wi th wo rl d wi d e vo te S tan d ard 43 , An n e x al l bo d y a bod i es) carri e d I n te rn ati o n al in cl o s e l y is m e m be r n o rm al l y been co m m i ttee m e m be r a is h as S tan d ard s th e S tan d ard bod i es Al l on S tan d ard i z ati o n ) (I S0 m em ber n o n - g o ve rn m e n tal , (I EC) ci rcu l ate d th at co l l abo rate s C o m m i ss i o n n ati o n al E ach co m m i ttee on fo r bo d i e s S tan d ard s co m m i ttee s wh i ch D raft s tan d ard s I n te rn ati o n al te ch n i cal wo rk O rg an i z ati o n n ati o n al in No wri ti n g I P o stal e part el e ctro n i c fro m of Swi tze rl an d l CH -1 21 pu bl i cati o n m e ch an i cal , th e Org an i zati o n 56 th i s or m ay i n cl u d i n g be pu bl i sh e r fo r Stan d ard G en eve 20 i zati o n l reprod u ced ph otocopyi n g S wi tze rl an d or u ti l i ze d an d in m i cro fi l m , an y fo rm wi th ou t I S0 90 53 : 91 (E ) I n tro d u cti o n Th e rfl o w m an n e r, re s i s tan ce som e co rre l ati o n s aco u s ti cal Th i s a) in in of th e i r be twe e n p ro pe rti e s I n te rn ati o n al re l ati n g th e i r b) of s tru ct e n s u ri n g th e s tru ctu re e xam pl e, som e of an d p ro d u ct th e th e i r i s, m ate ri al s p ro pe rti e s ( fo r S tan d ard u re po ro u s s tru ctu ral of aco u s ti cal q u al i ty th e s e of ( q u al i ty m ay be m ate ri al s abs o rpti o n , th e re fo re , m e th o d i n d i cate s , It u s e fu l in u sed an d atte n u ati o n , fo r pro pe r- ti e s of m an u factu re ; two an to i n d i re ct e s tabl i s h som e of th e i r e tc ) pu rpo s e s : po ro u s m ate ri al s to co n tro l ) III This page intentionally left blank -~ ~ ~ -~ - I N TE RN ATI ON AL - Acou sti cs M ateri al s D eterm i n ati on I S0 STAN D ARD of for rfl ow acou sti cal appl i cati on s is th e on d s fo r I n te rn ati o n al th e S tan d ard d e te rm i n ati o n of s pe ci fi e s th e two m ate ri al s fo r rfl o w aco u s ti cal - re s i s tan ce rfl o w per It is appl i cabl e p o ro u s to te s t N OTE in P as cal th e s e c- te s t s pe ci - is th e cro s s - s e cti o n al s peci m e n s cu t fro m of d i cu l ar pro d u cts to th e are a, th e te s t in s pe ci m e n s q u are d i re cti o n of p e rp e n - fl o w m ate ri al s D etai l s u n d er an n ex in of of It i ou r m etre , appl i cati o n s m etre s , of re s i s tan ce , cu bi c m en ; m e th o d s A p o ro u s (E ) resi stan ce S co pe Th i s 90 53 : 99 both of pu bl i cati on s i am i n ar an d re l ati n g tu rbu l en t to fl ow co n d i ti o n s is e xpre s s e d in P as cal s e co n d s per m e tre beh av- are g i ve n rfl o w s i d e re d A fi n e d re s i s ti vi ty, as bei n g Y: If th e m ate ri al h om og en eou s, th at is q u an ti ty co n d e- by R y= - S D efi n i ti o n s Fo r th e fo l l o wi n g d pu rpo s e s of d e fi n i ti o n s th i s I n te rn ati o n al S tan d ard , th e wh e re appl y R rfl o w re s i s tan ce , R: A q u an ti ty d e fi n e d is S th e s pe ci fi c P as cal by rfl o w s e co n d s per re s i s tan ce , m etre , of in th e te s t th e te s t spe ci m e n ; AP / R = T- d is th e th i ckn e s s , spe ci m e n in in th e m e tre s , d i re cti o n of of fl o w wh e re It is AP th e acro s s th e r p re s s u re th e te s t d i ffe re n ce , s pe ci m e n in wi th is e xpre s s e d in p ~ cal s e co n d s per s q u are m etre pas cal s , re s p e ct to l i n e ar rfl o w vel o ci ty, I A: A q u an ti ty d e fi n e d by atm o s p h e re ; 4V l CZ - is 4V th e vo l u m etri c m e tres te s t It is e xp re s s ed per rfl o w s e co n d , rate , pas s i n g in cu bi c th ro u g h wh e re spe ci m e n in P as cal A th e s e co n d s per cu bi c m etre 4v is th e m etre s 2 spe ci fi c fi n e d rfl o w re s i s tan ce , R, : A q u an ti ty te s t de- vo l u m e tri c per rfl o w s e co n d , rate , pas s i n g in cu bi c th ro u g h th e s peci m en ; by A R wh e re S= RA is th e m etre s , It is e xpre s s e d in cro s s - s e cti o n al of th e m e tre s te s t per are a, spe ci m e n s e co n d in s q u are I S0 053 : 99 (E ) rfl o w Vo l u m e tri c rate , 4v Cross- se cti on (are a A ) Pa ‘- P o rou s Pb Fi g u re - D i re ct rfl o w m e th o d ( m e th o d A) - B as i c m ate ri al AP =Pb pri n ci pl e P o rou s V PI P i s to n : freq u en cyf stroke h vo l u m e tri c Fi g u re rfl o w rate - qv Al te rn ati n g rfl o w m e th o d ( m e th o d B) - -Pa B as i c pri n ci pl e m ate ri al I S0 P ri n ci pl e D i rect rfl o w of P as si n g th ro u g h a a or twe e n th e fi g u re two in th e re ctan g u l ar of th e fre e A) fo rm face s rfl o w of a of pre s s u re th e te s t a) for e q u i pm e n t a ci rcu l ar p aral l e l e p i p e d , re s u l ti n g E q u i pm en t Th e u n i d i re cti o n al s peci m en a m eas u rem e n t (m eth od co n tro l l e d te s t cyl i n d e r m eth o d (E ) E q u i pm e n t 90 53 : 99 s h al l m e as u re m e n t is m eth od co n s i s t ce l l A of i n to wh i ch th e te s ; t spe ci m e n pl ace d ; an d d ro p be - spe ci m e n b) a c) a d e vi ce fo r pro d u ci n g a s te ad y rfl o w; (see ) d e vi ce fo r m e as u ri n g th e vo l u m etri c rfl o w rate ; d) Al tern ati n g P as s i n g of spe ci m e n a in tan g u l ar sl o wl y th e m eth od al te rn ati n g fo rm of a co m po n e n t e n cl o s e d by th e of (m eth od rfl o w ci rcu l ar an d paral l e l e pi pe d , al te rn ati n g ume rfl ow th ro u g h cyl i n d e r pre s s u re s pe ci m e n (see in a or m e as u re m e n t th e a of a te s t ( cyl i n d ri cal d e vi ce fo r acro s s te s t e) a re c- th e d e vi ce m e as u ri n q te s t fo r s peci m en th e p re s s u re d i ffe re n ce s peci m kn ; m e as u ri n g wh e n it is th e in th i ckn e s s po s i ti o n fo r of th e th e An e xam pl e fi g \ u re fi g u re ) wi th of s u i tabl e e q u i pm e n t is s h o wn th i ckn ess i n d i cato r ce l l secti on ) G ri l l or perfo rate d pl ate S pe ci m e n S pe ci m e n - g ri l l or su pport: pe rfo rate d pl ate S e al Ope n to th e atm os ph e re - D i ffe re n ti al t pre ssu re- Fl o wm e te tj , m e asu ri n g Fi g u re - , s) e q u i pm e n t, wi th cyl i n d ri cal s e cti o n , fo r d i re ct Ai r or d evi ce(s) M e as u re m e n t te s t te s t th e vo l - P i s to n M e asu re m e n t a B) rfl o w m e th o d su ppl y vacu u m ( m e th o d A) in I S0 053 : 99 (E ) M e as u re m e n t I Th e ce l l of Th e m e as u re m e n t ci rcu l ar cyl i n d e r e xam pl e in If of fi g u re it is a or a s h al l be in re ctan g u l ar cyl i n d ri cal th e s h ap e of paral l e l e pi pe d m eas u rem e n t ce l l a be cate d in cro s s - s e cti o n , th an 95 th e i n te rn al Fo r th e re ctan g u l ar d i am e te r s i d es Th e is s h al l m e as u re to tal h ei g h t e s s e n ti al l y an d at te s t of th e 00 th e s h ape , s q u are l e as t ce l l 90 In be s u ch spe ci m e n th an th at rfl o w al l te s t m en t cel l (on po s i ti o n e d far abo ve h ave a u te d not sh al l a m e et th e Th e en ou g h h ol es th an Th e h ei g h t th e th i ckn e s s i n si d e ab o ve th e open are a th e s u pp o rt if b as e of 50 be of sh al l th e In case s of th rou g h as tap pi n g an d rfl o w th e l e vel th e th e it m ay open test po i n ts Th e th e D e vi ce d i ffe re n ti al of th e i n d i cate d is fo r be area in th e ce l l of fo r th e u sed th e h ave a n e ce ssary Wh ate ve r s h al l th e pre s s u re s p e rrn i t to an m e as u re m e n t accu racy of k /o val u e fo r m eth od B s h al l co n s i s t of a m e as u re is p l ace d ; m en t cel l i n to wh i ch th e te s t s peci m en b) a c) a d e vi ce fo r p ro d u ci n q an c al te rn ati n g \ rfl o w; d i am ete r d e vi ce n ot to by i n crease re s tri ct of fo r th e th e m e as u ri n g th e te s t of th e al te rn ati n g te s t co m po - vo l u m e e n cl o s e d s peci m en ; a d e vi ce fo r m e as u ri n g wh e n it is th e in th i ckn e s s po s i ti o n fo r of th e th e te s t te s t pre s s u re be l o w arran g e d Two e xam pl e s s pe ci m e n pre s s u re re s e rvo i r or d e pre s s i o n vacu u m pre s s u ri z ati o n m ay in th e d) an d p re s s u re of s u i tabl e h o l d e rs e q u i pm e n t are s h o wn wi th in d i ffe re n t fi g u re an d rfl o w th at e tc ) th e s h al l d i s tri b- to m e as u re m en t p ro d u ci n g wate r co m pre s s o r, d i ffe re n ti al of to s u p po rt Al te rn ati ve l y, tam i n ate u sed e q u i pm e n t be u sed if pu m p cel l type s ys tem s th e y M e as u re m e n t s ys - Th e be m e as u ri n g s h al l e ve n l y ord er l e ak- fre e pe rfo rate d re co m m e n d e d tem s pre s s u re m e as u re m e n ts pre s s u re E q u i pm en t It d i ffe re n ti al fo r pe rm i t arran g e m e n t th e fi g u re indi- P a of a) spe ci m e n be s h al l of u sed 0, l spe ci m e n Th e th e mm so m e percen tag e rfl o w m e as u ri n g s h al l n en t N OTE of th e n e ce s s ary) , s u pp o rt %, % m e as u re - of Th i s m e as u re m e n t - f: th e re sh ou l d th e s u pp o rt re q u i re m e n t in re s t p e rfo rate d minimum l ess l ow Th e s pe ci m e n pe rm i t of e n te ri n g s pe ci m e n Th e s h al l accu racy p re - cas e , mm sh ou l d g re ate r th e an y fo r e q u i pm e n t p re s s u re s u n d i re cti o n al te s t mm a at l am i n ar l e avi n g l e as t is D evi ce Th e mm paral l e l e p i p e d cro s s - s e cti o n an val u e g re ate r u sed to s h o wn as fe rre d rfl o w An is ci rcu l ar s h al l ce l l arran g e m e n t th e m e as u re m e n t ce l l is co m po s e d of two parts : ( r n ot co n a) th e spe ci m e n b) th e te s t h o l d e r; r rfl o w perm i t fi n e s tabi l i ty of s o u rce is co n tro l th e of fl o w in u sed , th e th e an d fl o w th e i n s tal l ati o n l o we r s h al l part of vo l u m e (see fi g u re an d fi g u re 5) e n s u re th e B o th p arts d e r, as s h al l be in th e s h ap e of a ci rcu l ar cyl i n - te s t s h o wn in fi g u re an d fi g u re 5, or a re c- cel l tan g u l ar Th e rfl o w th at th e e n s u re s o u rce sh ou l d re s u l ti n g th at th e i n d e pe n d e n t of p ro vi d e ve l o ci ti e s rfl o w wi l l m e as u re d be rfl o w rate s l ow s u ch en ou g h re s i s tan ce s to are If th e is s h ape of cro s s- s e cti o n , th an 95 re co m m e n d e d rfl o w th at th e s o u rce be s u ch as ve l o ci ti e s d o wn to 0, x I O- m /s ci rcu l ar be in g re ate r re ctan g u l ar spe ci m e n is a s q u are h o l d e rs , In an y th e cas e , al l p re fe rre d si d es s h al l to In D e vi ce fo r p re s s u re m e as u ri n g tap of th e vo l u m e tri c rfl o w th e s o u rce th e as is sh al l at l e as t 90 mm o btai n e d Th e h ol der d i am e te r to m e asu re be s pe ci m e n i n te rn al mm cro s s- s e cti o n perm i t th e th e ve l o ci ty Fo r It paral l e l e pi pe d cl o s e an d as po s s i bl e th e rate te s t to vo l u m e tri c i n s tru m e n t s h al l s pe ci m e n , th e te s t rfl o w fo r be m e as u ri n g p l ace d i n si de spe ci m e n rate th e be twe e n te s t cel l cases, al l s e cti o Th e n e q u al te s t h ol d er l o we r vo l u m e (on face th e to t est at spe ci m e n a of th at s h al l p e rfo rate d th e vo l u m e l e as t te s t s h al l of re s t s u p po rt s pe ci m e n th e h ave s p e ci m e i n si d e if th e a n cro s s h o l d e r s pe ci m e n n e ce s s ary) d e l i n e ate s th e Th e te s t I S0 P i sto n wi th th i ckn e ss 9053 : 99 (E ) i n d i cato r G ri l l or pe rfo rate d S pe ci m e n g ri l l or pl ate su pport pe rfo rate d : pl ate S e al C o n n e cti o n pi s to n ph o n e cal i brati o n fo r th e _ fo r pu rposes In C o n n e cti o n pro d u ci n g Fi g u re - - M e asu re m e n t C o n n e cti o n co n d en ser ce l l wi th s pe ci m e n fo r th e d evi ce al te rn ati n g h ol d er s tru ctu re fo r fo r th e m i cro ph o n e -* fo r rfl o w m e as u ri n g ( m e th o d fi b re m ate ri al s of l oose an d wad d i n g E3) I S0 9053 : 99 (E ) S pe ci m e n -i n g H ol d er 7 / Ri n S e al i n g m ate ri al S e al C o n n e cti o n for th e C o n n e cti o n pi sto n ph o n e for d en se r cal i brati o n for pro d u ci n g Fi g u re s u ppo rt, are a of if % 50 m i cro ph o n e pu rpo se s C o n n e cti o n Th e th e for u sed , - M e as u re m e n t h ave s h al l even l y a d i stri bu ted cel l d evi ce r h ol d er fo r wi th minimum Th e th e al te rn ati n g fo r cu rren t cyl i n d ri cal s pe ci m e n o pen h o l es in q V, th e ‘ m s ( m e th o d B) rm s = A s h al l su pport h ave a d i am e te r n ot l e ss th an m tn wh e re N OTE th e In so m e percen tag e rfl o w of th rou g h su ch e l e m e n ts th an th e spe ci m e n th e th e it open te st m ay m axi m u m area in n e ce ssary ord er be wh en an rate l ess to fl ow to be th e i n crease re s tri ct rate u sed % th e re si stan ce rfl o w th an testi n g to n ot Th e wi th rfl o w sh o u l d m easu red be spe ci m e n (m e asu re d te st) si stan ce case s is th e fl ow th e per Th e by a pi s to n p ro d u ci n g I ts s e co n d , r m s is rfl ow re - is A val u e , g i ve n q r/, at a r m , s , in is prod u ced freq u en cy cu bi c is th e of m e tre s Th e be 7r , 2‘ p th e fre q u e n cy, th e m e n t) , is in h e rtz , of th e of th e a ran g e of 21 ,~ , , , $, val u es be m m /s in th e l ate ral l y to s pe ci m e n m o u n te d an am pl i fi er d e vi ce p i s to n ph o n e co n n e cte d s peci m en h ol d er h ol der co n d e n s e r an d sh al l to ves s e l m ete r be th e cal i s pe ci - th e s tro ke in ( p e ak m etres, of to th e cro s s - s e cti o n al pe ak rti g h t p re s s u re is g i ve n fo r wi th th e is th e s pe ci m e n cl o s e d h ol d er m e as u re m e n t th e Th e pi sto n ph on e, = I,4 -+- of th e pi s to n /I , ~ ~ , by - -+ ‘L in s q u are re s u l ti n g z C , , m s s,i n rm s m etres val u e per of wh ere cyl i n d e r th e seco n d , l i n e ar is rfl o w g i ven by ve - is th e atm o s ph e ri c p re s s u re , in is al te r- d i s pl ace - pi sto n ; are a, cal i brati o n ; pi s to n ; PO l o ci ty, m e tre s , P m e tre s , Th e s q u are m e as u re m e n t th e cl o s e d pe ff A by Th e fo r pas cal s , is th e pre s s u re a h o l d e r n ati n g wh e re h in co n n e cte d u si n g rti g h t al s o is m e tre s fi n A/- f an d m e as u re d p re s s u re m en r m s are a, th at m m /s m i cro ph o n e Th e by 0, al te rn ati n g sh al l b rate d 4v al te rn ati n g cu bi c s peci m en recom m en d ed be twe e n rfl o w rate si n u so i d al l y m o vi n g H z in speci m en al te rn ati n g vo l u m etri c al te rn ati n g ab o u t per fo r th e rate , th e It D e vi ce of val u e rfl o w s e co n d ; te s t 2 r m s vo l u m etri c g reater d u ri n g of q r/, r m s of pas cal s ; in I S0 v is th e pro d u ct of th e am pl i tu d e an d pi sto n If th e test speci m en s avai l abl e 9053 : 991 are n ot (E ) su ffi ci en tl y Pk cro s s - s e cti o n al are a pi s to n p h o n e , in of cu bi c th e th i ck cal i brati o n to spe ci m e n s m e tre s ; is th e vol u m e of th e test vessel , in sam e th e V p ro d u ce bu t way, a s u i tabl e not m o re m ay be pre s s u re th an d ro p , fi ve te s t ch o s e n in su peri m po sed cu bi c m etres Th e m e as u ri n g u te l y of in th e th e a p re s s u re pi sto n of th e is At am pl i tu d e abl e N u m ber to l e as t wh i ch i n d i cate wi th kn own pre ssu re spe ci fi c in th e pi ston ph o n e IO sh al l an d mm a h ave s tro ke pi ston re e m e as u rem e n ts fl ow test re si stan ce ve ss e l operati n g D evi ce Th e at fo r s pe ci m e n vari e s Test of h ave n e arl y a m easu ri n g sh own th at th e in of % of be E n su re Test wi th B ri n g al l o wi n g th e of in th e p re p are d m e as u re m e n t as d e- ce l l th e ed g es th i ckn e s s i n d i cated m ay be are u sed pro p e rl y to s e al s e al e d th e ed g es of to an th e te s t d e vi ce fo r s pe ci m e n s m e as u ri n g i n to th e co n tact wi th th i ckn e s s th e u pp e r th e of th e te s t s pe ci m e n s , co m pre s s i n g it l i g h tl y accu racy n e ces s ary val u e to speci m e n s of N o te th e d e te rm i n e th i s th e th i ckn ess th e d e ri ve te s t fre e an d or th e th e fre e s pe ci m e n u se th i s m easu rem en t co m pre s s e d or wh e n th e in vo l u m e co m p re s s e d an d d e n s i ty po s i ti o n Sh ape Th e te s t s pe ci m e n d e pe n d i n g on m ay th e be typ e ci rcu l ar of or re ctan g u l ar, m e as u re m e n t cel l avai l - S i n ce wi th ran g e , i bl e D i m en si o n s Late ral u, it of 0, en ce Wh e n te s ti n g s o ft, co m pre s s i bl e m ate ri al s , s u ch i n s u l ati o n s take n th e in th e or fl exi bl e pre parati o n po s si bi l i ty of of l e aks fo am s, th e al o n g care spe ci m e n s th e be s h al l to ed g es re d u ce In cas e s , te s t spe ci m e n s s h al l s l i g h tl y m e as u re m e n t be p re p are d l arg e r th an m ate ri al s s h al l wi th th o s e th e u re d i m en s dime n si on s cas e of A) , is of at A th e in a rfl o w re co m m e n d e d 0, poss- th e l o we r wo u l d Pa in- ce rtai n ve l o ci ty, as ve l o ci ty -of m an y to s m al l est l i n e ar parti cl e p re s s u re th e th e e i th e r pro ce d u re pre s s u re d i re ctl y l ate ral of th e d o wn ve l o ci ty to Th e cal cu l ate d (80 co rre - dB t- e fe r- at u si n g d ro p = Ap 0, x d i re ct s h al l I O- - rfl o w be m /s m eas or th e l o we r s pe ci fi c in limit rfl o w acco rd an ce of l i n e ar s te p - re s i s tan ce wi th rfl o w s h al l be 2 cel l of r igid h ave th e th e as t he m e as u re m e nt cas e e ach be taken to a re d u cti o n g rap h of of s pe ci fi c rfl o w, rfl o w pl o t re s i s t- ce l l an ce sh ou l d i n cre m e n tal s pe ci m e n ve rs u s spe ci fi c Care of s am e fo r N OT E m /s sou n d vel o ci ty m e as u t- e d vel o ci ty of fou n d th e s e In S pe c a rfl o w been pP a) (m e th o d wi s e d i m en si on s I O- - re s i s tan ce h as as In fi bro u s be val u e to 20 l i n e ar rfl o w x rfl o w m ateri al s sh ou l d Th i s sp o n d d i m en si on s s pe ci fi c th e l i n e ar l i m i t th e sou n d -abso rbi n g cre as e abl e avoi d of d i sto rti on l i n e ar rfl o w rfl o w ve l o ci ty re s i s tan ce fo r tl Fro m = 0, x th i s , th e I O- m /s th e sh al l be d e te rm i n e d by g raph i cal ave rag i n g o r, if s pe ci m e n te st n e ce s s ary, 2 In Th i ckn e s s th e Th e th i ckn ess o btai n mum th e p re s s u re co n d i ti o n s m e as u re m en t of an d ce l l test speci m en d ro p s to su i t sh al l m e as u rabl e th e u s abl e be ch osen u n d er d e pth o p ti of th e al l y 0, x e xtrapo l ati o n a th e as m /s to pro ced u re speci fi c d e te rm i n e d I O- - u sed of B) , be ce d u re be by case (m eth o d to e ach cu t a fro m s pe ci m e n , 5, th at j el l y spe ci m e n s fro m be th i ckn ess e q u i p pe d i n d i cato r s pe ci m e n th e te s t cl au s e ri g i d if 2, t &e n , wi th s u rface + - be sh al l th e ad i abati cal l y speci m en sh al l o th e r or m e as u re m e n t s h al l m en s pro ce d u re P l ace s cri be d s pe ci m e n of of s s pe ci H z h ol d er m i cro m e te r s am pl e te s t P e tro l e u m 43 speci m en s of th e test mm M e rco m pari s o n th re e th N OTE of abs o l - d i rectl y cal i brati n g cal i brate d u n ch an g e d appro xi m ate l y appro xi m ate l y be s cal e resi stan ce th e of th u s Wi th pi s to n , fl o w d i am e te r can u n i ts m e as u ri n g s pe ci fi c Th e d e vi ce u si n g rfl ow at a O th e rwi s e , d e s cri be d th i s in th e val u e al tern ati n g resi stan ce r m s th e cas e rfl o w can vel o ci ty, s te p - b y- s te p of m e th o d u su 21 , of p ro A s h al l I S0 9053: 991 (E) d) P reci si o n th e an d preci si on I n te r- l abo rato ry Test e xpe ri m e n ts are test d i ti on s d i m en si on s u sed , of th e parti cu l arl y m e as u re m e n t th e s h ap e cel l ; pl an n e d re po rt e) th e f) th e m e th o d n u m be r of p re p arati o n of te s t of th e s pe ci m e n s te s t an d spe ci m e n ; th ei r l ate ral d i m en s i o n s ; Th e te s t m ati o n te s t re p o rt in sh al l ad d i ti o n s pe ci m e n s an d o th e r e tc ) , if to as are th e re s u l ts d e s cri be d s tati s ti cal th e y i n cl u d e th e in param e te rs d e m an d e d fo l l o wi n g an d th e fo r th e i r ( s tan d ard by i n fo r- cal cu l ate d th e p ro d u ct a to th i s I n te rn ati o n al n ecessary, th e wi th o ri en tati o n re s pe ct to of th e th e axi s pri n ci pal of th e axe s test of sym m etry; s pe ci fi - h) re fe re n ce if s pe ci m e n s d e vi ati o n , cati o n : a) g) m e an S tan d ard ; th e th e p re s e n ce an d th i ckn e s s n atu re an d of d e n s i ty an y of s ki n ; th e m ateri al as te s te d ; b) th e m ate ri al d e n s i ty, of i n cl u d i n g th e th e p ro d u ct, app ro p ri ate an d i ts app are n t te s t s tan d ard u sed : an y d e vi ati o n th i s I n te rn ati o n al fl u e n ce d c) th e m e th o d mining th e u sed rfl o w an d i ts re s i s tan ce ; l o we r limit fo r d e te r- th e fro m re s u l ts th e p ro ce d u re s S tan d ard wh i ch s pe ci fi e d m ay h ave in in- I S0 An n e x 9053: 991 (E) A (i n fo rm ati ve ) B i bl i o g raph y I SO 4638: fl e xi bl e 984, P o l ym eri c m ate ri al s, D e te rm i n ati o n - of r ce //u ! ar fl o w [t; ] WE B E R , K , Ap paratu r fi i r m e abi l i ty E l e ktro - L , CREM E R, d er pri n ci pl e s S Die wi s s e n s ch aftl i ch e n R au m aku s ti k of H i rz e l ( Th e ro o m Ve rl ag , S] fu n d am e n tal vo l 3, KRAAK, d yn am i s ch e kre i s farm i g e r s tan d we rt H o ch fl - e q rren z te ch n i k (I O) , [4] 956: RE I C H AR D T, 2n d ed , g e s e l l s ch aft p und S tri j m u n g s ku rz e r Te ch n i s ch e n 957 E A J , G as d yn am i cs , B o s to n : Al l yn an d 969 G ru n d l ag e n Le i pz i g : G eest d er E l e ktro aku s ti k, Akad e m i s ch e & P o rti g , ZWI KKE R, ing C an d m ateri al s , KOS TE N , C W , Am ste rd am : Sou n d E l se vi e r, ab s o rb - 949 Kan $l e E l e ktro aku sti k, 46 W , d er I n s ti tu f 950 Der W , J AM E S , B aco n , Le i pz i g : 71 [3 ] B au aku s ti k D re s d e n , kl e i n e r am G ru n d l ag e n s ci en ti fi c aco u s ti cs ) , M essu n g U i pl o m arbe i t und H o ch s ch u l e , ] zu r S tr&- n u n g s s tan d we rte , p e r- Ve rl ag s - 65 8) B R OWN , R L of fl o w J Aco u s t an d re s i s tan ce S o t B OLT, of Am , R H , p o ro u s (4) , Th e m e as u re m e n t aco u s ti c 42 : p p m ate ri al s 337-344 This page intentionally left blank This page intentionally left blank I S0 9053: 991 (E) - - U DC : - 40 : 3 D e scri pto rs: P ri ce based aco u sti cs, on acou sti c i n su l ati on , i n s u l ati n g m ate ri al s (aco u sti c) , po rou s m ate ri al s, te sts, pag es g as pe rm e abi l i ty te sts This page has been left intentionally blank