Impact and airborne sound insulation in a series of apartment buildings

Publisher’s version / Version de l'éditeur:

Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la

première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n’arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca.

Questions? Contact the NRC Publications Archive team at

PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information.

https://publications-cnrc.canada.ca/fra/droits

L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB.

Internal Report (National Research Council of Canada. Division of Building

Research), 1964-03-01

READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.

https://nrc-publications.canada.ca/eng/copyright

NRC Publications Archive Record / Notice des Archives des publications du CNRC :

https://nrc-publications.canada.ca/eng/view/object/?id=56790384-83e7-425c-b950-083556311c1b https://publications-cnrc.canada.ca/fra/voir/objet/?id=56790384-83e7-425c-b950-083556311c1b

NRC Publications Archive

Archives des publications du CNRC

For the publisher’s version, please access the DOI link below./ Pour consulter la version de l’éditeur, utilisez le lien DOI ci-dessous.

https://doi.org/10.4224/20337908

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at

Impact and airborne sound insulation in a series of apartment

buildings

NATIONAL RESEARCH COUNCIL CANADA

DIVISION O F BUILDING RESEARCH

IMPACT AND AIRBORNE SOUND INSULATION IN A SERLES O F APARTMENT BUILDINGS

by D. Olynyk I n t e r n a l R e p o r t No. 2 8 8 of t h e Division of Building R e s e a r c h OTTAWA M a r c h

1964

P R E F A C E

T h e Division, t h r o u g h i t s Building P h y s i c s S e c t i o n , h a s long been i n t e r e s t e d in v a r i o u s a s p e c t s of building a c o u s t i c s . One of the obvious p r o b l e m s i s t h a t of n o i s e t r a n s m i s s i o n t h r o u g h c o n s t r u c t i o n s . A c t i v i t i e s in t h i s s u b j e c t w e r e confined f o r m a n y y e a r s t o l a b o r a t o r y m e a s u r e m e n t s on t e s t p a n e l s , although i t w a s r e a l i z e d that t h e r e w e r e m a n y c o m p l i c a t i o n s in p r a c t i c e which m a d e i t highly d e s i r a b l e t o m a k e m e a s u r e m e n t s in a c t u a l buildings.

T h e development of staff and f a c i l i t i e s h a s m a d e it p o s s i b l e t o begin s u c h field s t u d i e s which have b e e n initiated with m e a s u r e m e n t s of t h e sound t r a n s m i s s i o n between dwelling u n i t s in five a p a r t m e l t buildings in Ottawa. The c o - o p e r a t i o n of the o w n e r s in making t h e s e s t u d i e s p o s s i b l e i s g r e a t l y a p p r e c i a t e d .

T h e a u t h o r , a g r a d u a t e in e n g i n e e r i n g p h y s i c s and

a

r e s e a r c h officer with t h e Division, h a s been a s s i g n e d r e s p o n s i b i l i t y f o r sound t r a n s m i s s i o n s t u d i e s .

Ottawa

M a r c h 1964

N . B . Hutcheon A s s i s t a n t D i r e c t o r

IMPACT AND AIRBORNE SOUND INSULATION

IN A SERIES O F APARTMENT BUILDINGS

by

D. Olynyk

T h i s r e p o r t r e p r e s e n t s t h e beginning of a p r o g r a m of

m e a s u r e m e n t s of sound i n s u l a t i o n i n t y p i c a l a p a r t m e n t buildings. T h e five buildings r e p o r t e d on h e r e have e s s e n t i a l l y t h e s a m e f l o o r a n d

s i m i l a r wall s t r u c t u r e s : t h e f l o o r c o n s i s t e d of open-web s t e e l j o i s t s ,

1

supporting a 2 ~ - i n . c o n c r e t e f l o o r s l a b , with l a t h and p l a s t e r below; t h e w a l l s w e r e of heavy m a s o n r y ( 8 - i n . d e n s e - a g g r e g a t e c o n c r e t e b l o c k s o r h e a v i e r ) . F i n i s h f l o o r s w e r e p a r q u e t o r v i n y l - a s b e s t o s t i l e s c e m e n t e d t o t h e c o n c r e t e .

E m p h a s i s i n t h i s study w a s on v e r t i c a l t r a n s m i s s i o n t h r o u g h t h e f l o o r s (both a i r b o r n e and i m p a c t s o u n d ) .

In

a d d i t i o n , one p a r t y w a l l w a s t e s t e d f o r a i r b o r n e sound t r a n s m i s s i o n i n one building (Building E )

.

DESCRIPTION O F BUILDINGS F i v e buildings in t h e Ottawa a r e a , a l l of r e c e n t c o n s t r u c t i o n , w e r e e x a m i n e d . In a l l but two c a s e s t h e a p a r t m e n t s w e r e u n f u r n i s h e d D e t a i l s of c o n s t r u c t i o n a r e l i s t e d below. Building A

1. 3/8-in. p a r q u e t f l o o r in both living r o o m a n d b e d r o o m .

2. Ceiling: 2 - i n . i n s u l a t i o n b a t t s , m e t a l l a t h and p l a s t e r .

3. E x t e r i o r walls: 4 - i n . b r i c k a n d 8 - i n . d e n s e - a g g r e g a t e block.

4. J o i s t s running f r o m e x t e r i o r w a l l t o c o r r i d o r w a l l s .

5. P a r t y and c o r r i d o r walls: 8 -in. hollow d e n s e - a g g r e g a t e c o n c r e t e b l o c k , c a r r i e d u p t o c o n c r e t e f l o o r s l a b .

3 6. Volume of living r o o m : 1750 ft3; b e d r o o m : 1 1 60 f t

.

Building B

S i m i l a r t o Building A _{e x c e p t f o r the following:}

1. V i n y l - a s b e s t o s t i l e in b e d r o o m .

2. J o i s t s running f r o m p a r t y w a l l t o p a r t y w a l l .

3 3

3. Volume of living r o o m : 1440 f t ; b e d r o o m : 1000 f t

.

Buildine

C

S i m i l a r t o Building A _{e x c e p t f o r the following:}

2. J o i s t s running f r o m p a r t y w a l l t o p a r t y w a l l . 3 . _{P a r t y w a l l s : 1 2 - i n . c o n c r e t e b l o c k s .} 3 4. V o l u m e o f l i v i n g r o o m : 2 0 0 0 f t 3 ; b e d r o o m : 1 0 7 0 f t

.

Building

D

S i m i l a r t o Building A _{e x c e p t f o r t h e following:}

1. V i n y l - a s b e s t o s t i l e in both living r o o m and b e d r o o m .

2. J o i s t s running f r o m p a r t y w a l l t o p a r t y w a l l .

3. No i n s u l a t i o n b a t t s i n c e i l i n g s p a c e .

3 3

4. Volume of living r o o m : 1540 f t ; b e d r o o m : 1060 f t

.

Building E

I d e n t i c a l t o Building B e x c e p t t h a t in Building B the heating o u t l e t s a r e in the c e i l i n g s , w h e r e a s in Building E the o u t l e t s a r e in the f l o o r . T h u s in Building E the f l o o r s l a b i s p i e r c e d by heating d u c t s . Volume of living r o o m : 1440 ft3; b e d r o o m : 1000 f t 3

.

DESCRIPTION O F TESTS

The i m p a c t t e s t s , d e s i g n e d t o d e t e r m i n e t h e p e r f o r m a n c e of a f l o o r u n d e r d i s t u r b a n c e s , s u c h a s f o o t s t e p s , followed R e c o m m e n d a t i o n

R-140-1960 of t h e I n t e r n a t i o n a l O r g a n i z a t i o n f o r S t a n d a r d i z a t i o n . The p r o c e d u r e u s e s a s t a n d a r d tapping m a c h i n e , which c o n t a i n s five s m a l l m e t a l h a m m e r s t h a t f a l l f r e e l y a t a specified r e p e t i t i o n r a t e on the f l o o r u n d e r t e s t . The r e s u l t i n g i m p a c t n o i s e t r a n s m i t t e d i n t o t h e r o o m below i s m e a s u r e d in a s e r i e s of t h i r d - o c t a v e f r e q u e n c y bands.

Since t h e sound l e v e l i n t h e r e c e i v i n g r o o m depends on t h e sound a b s o r p t i o n of t h e r o o m i t i s c u s t o m a r y t o a d j u s t r e s u l t s t o c o r r e s p o n d t o a s t a n d a r d a b s o r p t i o n . T h e m e a s u r e d l e v e l s in t h e r e c e i v i n g r o o m a r e a d j u s t e d t o a r e f e r e n c e a b s o r p t i o n equivalent t o 10 s q u a r e m e t r e s (108 s q f t ) of p e r f e c t a b s o r b e r .

The i m p a c t c u r v e s in F i g u r e s 1 t o 7 show the s p e c t r u m l e v e l of t r a n s m i t t e d n o i s e ; t h u s t h e l o w e r the c u r v e t h e b e t t e r t h e p e r f o r m a n c e of t h e f l o o r . Single - f i g u r e I m p a c t Noise R a t i n g s (INR) following a r e c e n t l y p r o p o s e d U . S. F e d e r a l Housing A d m i n i s t r a t i o n r e q u i r e m e n t ( F H A B u l l e t i n 750), a r e a l s o shown. A p o s i t i v e r a t i n g i n d i c a t e s t h a t t h e c o n s t r u c t i o n t e s t e d i s s u p e r i o r t o the m i n i m u m r e q u i r e m e n t .

T h e a i r b o r n e sound t r a n s m i s s i o n l o s s of t h e f l o o r in e a c h a p a r t m e n t building w a s m e a s u r e d following t h e method of I S 0 R - 1 4 0 and ASTM E 9 0 - 6 1 T . It i s given by:

T L =

A

_L

+

_{1 0 log ( s / A ~ )} w h e r e AL i s the m e a s u r e d l e v e l d i f f e r e n c e , d e c i b e l s S i s the s u r f a c e a r e a of the t r a n s m i t t i n g s u r f a c e , s q u a r e f e e t A 2 i s the a b s o r p t i o n of t h e r e c e i v i n g r o o m , s a b i n s T h e l a s t t e r m i s a s t a n d a r d c o r r e c t i o n t e r m t h a t n o r m a l i z e s the m e a s u r e m e n t s t o allow f o r v a r i a t i o n s in t h e a r e a of s o u n d - t r a n s m i t t i n g

s u r f a c e and the sound a b s o r p t i o n in t h e r e c e i v i n g r o o m . In s o m e c a s e s S i s not well-defined; f o r e x a m p l e a living r o o m m a y not b e s e p a r a t e d f r o m a n o t h e r r o o m o r a h a l l . F o r t u n a t e l y t h e c o r r e c t i o n i s n o t s e n s i t i v e t o s m a l l e r r o r s : a 2 5 p e r c e n t e r r o r in S would a m o u n t t o 1 d e c i b e l in t h e f i n a l d e t e r m i n a t i o n .

In s o m e of the p r e s e n t m e a s u r e m e n t s , when t h e a i r b o r n e t r a n s m i s s i o n l o s s w a s v e r y high, i t w a s difficult t o p r o d u c e a high enough l e v e l of t r a n s m i t t e d sound t o be s a f e l y above the l e v e l of e x t r a n e o u s n o i s e in t h e r e c e i v i n g r o o m . A f e w of the high f r e q u e n c y o b s e r v a t i o n s ( i d e n t i f i e d in t h e r e s u l t s ) m u s t f o r t h i s r e a s o n be r e g a r d e d a s m i n i m u m v a l u e s .

A s a single - f i g u r e r a t i n g f o r a i r b o r n e sound 10s s t h e

ASTM Sound T r a n s m i s s i o n C l a s s ( S T C ) i s u s e d (See ASTM E 9 0 - 6 1 T : " L a b o r a t o r y M e a s u r e m e n t of A i r b o r n e Sound T r a n s m i s s i o n L o s s of

Building F l o o r s and W a l l s . " Appendix). T h i s i s c o m p a r a b l e n u m e r i c a l l y

t o t h e t r a d i t i o n a l nine-frequency a v e r a g e , but i s m o r e s e n s i t i v e t o d e f i c i e n c i e s in t h e f r e q u e n c y r a n g e of m o s t i m p o r t a n c e in s p e e c h and d o m e s t i c n o i s e s . RESULTS T h e s i n g l e - f i g u r e r a t i n g s f o r a l l c o n s t r u c t i o n s a r e s u m m a r i z e d i n T a b l e I. I m p a c t sound s p e c t r a , o v e r t h e r a n g e 100 t o 4000 c / s , a r e given in F i g u r e s 1 to 7. F i g u r e s 6 and 7 a r e m e a s u r e m e n t s t a k e n in t h e s a m e building a t s e p a r a t e t i m e s in two d i f f e r e n t s e t s of a p a r t m e n t s , t h e second s e t being one f o r w h i c h c o m p l a i n t s about inadequate i n s u l a t i o n had b e e n r e c e i v e d . In F i g u r e 8 the a i r b o r n e sound t r a n s m i s s i o n l o s s e s of the five living r o o m f l o o r s a r e plotted f o r f r e q u e n c i e s a t o n e - o c t a v e i n t e r v a l s between 125 and 4000 c / s . F i g u r e 9 s h o w s , f o r a i r b o r n e

sound t r a n s m i s s i o n 10s s: ( 1 ) C o m p a r i s o n s between living r o o m f l o o r s in d i f f e r e n t s e t s of a p a r t m e n t s in the s a m e building, and ( 2 ) C o m p a r i s o n s between the b e d r o o m and living r o o m f l o o r s (both p a r q u e t ) in t h e s a m e a p a r t m e n t . An a r r o w a t s o m e of t h e h i g h e r f r e q u e n c i e s i n d i c a t e s t h a t t h e o b s e r v a t i o n w a s l i m i t e d by t h e a m b i e n t n o i s e l e v e l and i s t o be r e g a r d e d a s a m i n i m u m v a l u e . F i g u r e 10 c o m p a r e s b e d r o o m and living r o o m f l o o r s of t h e t i l e and p a r q u e t r e s p e c t i v e l y f o r a i r b o r n e sound t r a n s m i s s i o n l o s s in the s a m e a p a r t m e n t . F i g u r e 11 shows t h e a i r b o r n e sound t r a n s m i s s i o n l o s s of a t y p i c a l p a r t y w a l l in Building E . E x c e s s i v e a m b i e n t n o i s e m a d e m e a s u r e m e n t s a t 1 2 5 c / s i m p o s s i b l e . CONCLU ' SIONS The i m p a c t i n s u l a t i o n r e q u i r e m e n t s of m o s t o t h e r c o u n t r i e s r a n g e f r o m about INR = - 2 t o INR = + 6 . T h u s a l l t h e f l o o r s h e r e r e p o r t e d f a l l below what i s g e n e r a l l y r e g a r d e d a s a c c e p t a b l e , although t h e y a r e

s u p e r i o r t o o t h e r t y p e s c o m m o n l y u s e d in C a n a d a ( e . g. wood j o i s t o r r e i n f o r c e d c o n c r e t e s l a b c o n s t r u c t i o n ) . It i s t o be noted t h a t a p a r q u e t f l o o r s u r f a c e a p p e a r e d s i g n i f i c a n t l y s u p e r i o r ( a v e r a g i n g about 3 d b ) t o a vinyl - a s b e s t o s t i l e s u r f a c e . O t h e r evidence s u g g e s t s t h a t by adding a s l i g h t l y r e s i l i e n t l a y e r b e t w e e n p a r q u e t and t h e c o n c r e t e s u r f a c e t h e c o n s t r u c t i o n could be m a d e significantly b e t t e r . A i r b o r n e t r a n s m i s s i o n should be t h e s a m e f o r t h e two t y p e s of f l o o r s u r f a c e , and i s t h e s a m e f o r Building E ,

although t h e r e i s a n a n o m a l o u s r e s u l t i n the second t e s t a t Building E . The s p r e a d of 8 db a m o n g i m p a c t t e s t s f o r e a c h type of f l o o r cannot be

fully e x p l a i n e d , but a few c o m m e n t s and s p e c u l a t i o n s will be o f f e r e d below.

With one exception the a i r b o r n e t r a n s m i s s i o n l o s s e s

c o m f o r t a b l y e x c e e d the CMHC m i n i m u m r e q u i r e m e n t of 4 5 db ( r o u g h l y equivalent t o Sound T r a n s m i s s i o n C l a s s 4 5 ) . E u r o p e a n e v i d e n c e

i n d i c a t e s t h a t a Sound T r a n s m i s s i o n C l a s s 45 f l o o r would not b e r e g a r d e d a s a c c e p t a b l e by m o r e than about 50 p e r c e n t of t e n a n t s . Hence i t i s not s u r p r i s i n g t h a t the exceptionally low c a s e (Building A b e d r o o m s , a p a r t m e n t s 510 t o 610, Sound T r a n s m i s s i o n C l a s s 41) i s t h e one r e g i o n w h e r e c o m p l a i n t s have b e e n r e c e i v e d . T h e c a u s e of t h e low value i s p o s s i b l y due t o s o m e u n s u s p e c t e d flanking p a t h in t h i s p a r t of the s t r u c t u r e .

The Sound T r a n s m i s s i o n C l a s s 47 obtained in t h e one a i r b o r n e t r a n s m i s s i o n m e a s u r e m e n t t h r o u g h a p a r t y w a l l i s c o n s i s t e n t with

l a b o r a t o r y m e a s u r e m e n t s on s i m i l a r 8 -in. block w a l l s . T h i s i s probably a r e a s o n a b l y a c c e p t a b l e c o n s t r u c t i o n , although i t would not quite m e e t E u r o p e a n s t a n d a r d s .

It will be noted t h a t Building C i s one of t h e b e t t e r buildings. T h i s can probably be a t t r i b u t e d t o t h e e x t r a heavy c o n s t r u c t i o n of t h e supporting w a l l s . In s t u d i e s by o t h e r s t h e weight of s u p p o r t i n g w a l l s h a s been found t o influence the p e r f o r m a n c e of t h e f l o o r s a l s o .

M e a s u r e m e n t s in Buildings B and E should p e r m i t a d e t e r m i n a t i o n of the effect of p i e r c i n g the f l o o r s l a b with w a r m a i r heating o u t l e t s . It m i g h t be s u r m i s e d that s u c h openings would r e s u l t in a n e a s y t r a n s m i s s i o n path, a t l e a s t into t h e f l o o r - c e i l i n g s p a c e . The c o m p a r i s o n , in f a c t , shows n o significant d i f f e r e n c e in a i r b o r n e

i n s u l a t i o n and the r e v e r s e s0l.t of effect f o r i m p a c t . H e n c e , it a p p e a r s that t h e f l o o r o u t l e t s a r e , if anything, s u p e r i o r t o t h e ceiling o u t l e t s , f r o m the viewpoint of i m p a c t . One can s p e c u l a t e t h a t p o s s i b l y , in t h e l a t t e r c a s e , i m p a c t v i b r a t i o n s a r e t r a n s m i t t e d d i r e c t l y t o t h e heating d u c t s t h r o u g h t h e i r s u p p o r t s , and t h a t t h e n o i s e i s t h e n t r a n s m i t t e d v i a the d u c t s t o t h e s p a c e below.

The m o s t i n t e r e s t i n g i n c o n s i s t e n c y i s between t h e two s e t s of i m p a c t m e a s u r e m e n t s m a d e a t Building A . The a p a r t m e n t s studied w e r e nominally i d e n t i c a l , and s t a c k e d one above t h e o t h e r . A i r b o r n e l o s s e s between living r o o m s w e r e i d e n t i c a l , but the f l o o r between 610 and 510 a p p e a r s 3 o r 4 d b b e t t e r f r o m t h e viewpoint of i m p a c t t h a n the f l o o r below. P r e s u m a b l y s o m e m i n o r d i f f e r e n c e in c o n s t r u c t i o n p r a c t i c e w a s i n t r o d u c e d a t t h i s s t a g e .

Another s o u r c e of speculation r e g a r d i n g Building A _{i s}

the r a t h e r low a i r b o r n e l o s s ( e v e n between living r o o m s ) a s c o m p a r e d to Buildings B and E. I t i s doubted that the d i r e c t i o n of the floor j o i s t s ( f r o m outer wall t o c o r r i d o r wall in t h i s building) i s itself a f a c t o r that would make t h i s building i n f e r i o r t o Building B o r E . T h e r e m a y , however, be s o m e r e s u l t a n t difference in s t r ' u c t u r e t h a t i s significant, f o r example the j o i s t s between walls and f l o o r s l a b , o r t h e s e r v i c e connections. One possibility i s that the sound-absorbing b a t t s alleged t o be in the f l o o r - c e i l i n g s p a c e w e r e omitted. I t would then be c o n s i s t e n t with Building D , which had a s i n l i l a r l y low a i r b o r n e l o s s , and which h a s no absorption in the joist s p a c e .

T A B L E I

F l o o r T e s t s

SUMMARY OF SINGLE-FIGURE RATINGS F O R A L L CONSTRUCTIONS

I m p a c t Noise Rating (INR) Sound T r a n s m i s s i o n ( a n d f l o o r s u r f a c e ) C l a s s ( S T C ) ( a n d l o c a t i o n ) Building A

-

1st t e s t Building A

-

2nd t e s t Building

B

Building C Building D Building

E

P a r t y Wall T e s t B u i lding E B e t w e e n B e t w e e n Living R o o m s B e d r o o m s

-

12 p a r q u e t - 1 1 p a r q u e t 48 living r o o m

-9

p a r q u e t -7 p a r q u e t 48 living r o o m 41 b e d r o o m

-

11 p a r q u e t

-

1 7 t i l e 55 living r o o m - 4 p a r q u e t

-

11 t i l e 54 living r o o m - 9 t i l e

-

1 0 t i l e 49 living r o o m - 7 p a r q u e t

-

1 2 t i l e 54 living r o o m 54 b e d r o o m

F R E Q U E N C Y I N C Y C L E S PER S E C O N D

I mpact Noise Rating

Living Room (Parquet)

-12

- - -

Bedroom

(Parquet)

-11

Apts. 510 and 410 used

Measurements Taken on 17 JIJIY, 1963

F I G U R E

1

I M P A C T S O U N D S P E C T R A

-

B U I L D I I V G A

F R E Q U E N C Y

I l l

C Y C L E S P E R S E C O N D

I mpact Noise Rating

Living Room (Parquet)

-11

- - -

Bedroom

(Tile)

- 17

Apts. 505 a n d 405 used

Measurements Taken o n 18 July, 1963

F I G U R E 2

I M P A C T S O U h l D S P E C T R A

- B U I L D I N G B

F R E Q U E N C Y I N C Y C L E S P E R S E C O I V D

I

mpact Noise Rating

L i v i n g Room (Parquet)

- 4

---

_Bedroom

_(Tile)

_-11

Apts.

7 a n d 11 used

Measw r e m e n t s Talten o n 23 July, 1963

F I G U R E 3

I M P A C T S O U N D S P E C T R A

- B U I L D I N G C

-

I

125

250

500

1,000 2,000 4,000

t-

F R E Q U E N C Y I N C Y C L E S P E R S E C O N D

I

mpact Noise Rating

Living Room (Tile)

- - -

_Bedroom

_(Tile)

Apts. 4 and

7

used

Measurements Taken o n 31 July, 1963

F I G U R E 4

I M P A C T S O U N D S P E C T R A

-

B U I L D I N G D

-

T

I-

125

250

500

1,000 2,000 4,000

FREQUENCY I N C Y C L E S PER S E C O N D

Impact Noise Rating

Living Room (Parquet)

- 7

---

_Bedroom

_{(Ti le)}

_-12

Apts. 608 and 508 used

Measurements Taken on 29

Aug.

,

1963

F I G U R E

5

I M P A C T S O U N D S P E C T R A

- B U I L D I N G E

-

I

I-

125

250

500 1,000 2,000 4,000

F R E Q U E N C Y I N C Y C L E S P E R S E C O N D

L i v i n g Room (Tested 17

July,

1963) Apts. 510 & 410

---

L i v i n g Room (Tested 3 Oct. , 1963) Apts. 510

&

610

F I G U R E 6

I M P A C T S O U N D S P E C T R A

- B U I L D I N G

A

3 0 8 1 - 6

I

I

I

I

-

-

-

-

-

-

-

-

-

-

\

INR

=

- 7

4

-

-

I

I

I

F R E Q U E N C Y I N C Y C L E S P E R SECOIVD

Bedroom (Tested 17 July, 1963) Apts. 510 & 410

---

Bedrooni (Tested 3 Oct., 1963) Apts. 510

& 610

F I G U R E

7

I M P A C T S O U N D S P E C T R A

- B U I L D I N G A

t

I

I

I

-

-

_{Arrows Denote Minimum Values}

-

,/

-

-

-

-

-

-

-

-

-

-

I

F R E Q U E N C Y

I N C Y C L E S P E R S E C O N D

Sound Transmission

Class

Building

A

48

- - -

Building

B

₅₅

. . .

.

. . .

Building C

54

- - - Building

D

49

- - - -

_Building

_E

₅₄

Measurements Taken in July, August 1963

F I G U R E

8

A I

RBORhIE

S O U N D

TRANSMI SSIOI\

L O S S

O F

F R E Q U E N C Y I N C Y C L E S P E R S E C O N D

I

I

Living Room STC

=

48

(Apt.

510 & 610)

3 Oct 1963

- - - -

Bedroom

STC

=

41 (Apt. 510 & 610) 3 Oct 1963

A-

A

Living Room STC

=

48 (Apt. 410 & 510) 17 J u l y 1963

I

F I G U R E

9

-

Arrows Denote M i n i m u m Values

-

-

-

-

-

-

-

-

-

/

-

-

I

A I R B O R N E S O U N D T R A N S M I S S I O N L O S S O F

F L O O R S

- B U I L D I N G A

fiu 3081- y

125

250

500 1,000 2,000 4,000

F R E Q U E N C Y I N C Y C L E S P E R S E C O N D

Living Room STC

=

54 (Apt. 506 & 606)

- - -

_{Bed room}

_STC

₌

_{54 (Apt. 506 & 606)}

Measurements Taken o n 26 Aug., 1963

F I G L I R E

1 0

A I R B O R N E S O U N D T R A N S M I S S I O N L O S S OF

F L O O R S

- B U I L D I N G E

&? 3 0 8 / - ( 0

10

125

250

500

1,000 2,000 4,000

F R E Q U E N C Y I N C Y C L E S PER S E C O N D

(

Living Room 606

-

Living Room 605

1

STC

=

47

Measurements Taken o n 26 Aug., 1963

F I G U R E 11

A I R B O R N E S O U N D T R A N S M I S S I O N L O S S OF

P A R T Y W A L L I N B U I L D I N G E

_{eR 3 0 8 ) - 1 1}