IVIE IE-10A, Руководство владельца и оператора

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2 0 50 100 500 2 K 20K
FREQUENCY I N H z
ANSI S1.4-1967 S t a n d a r d f o r Sound- level Meters
F i g u r e 17
The w i l l measure dB SPL w i t h e i t h e r an A c u r v e o r a C curve
w e i g h t i n g and
.
The s c a l e w i l l
i
k e l y be used
o f t e n s i n c e OSHA and t h e Walsh- Healey A c t r e q u i r e n e a r l y a l l SPL readings
t o be made w i t h an A w e i g h t e d s c a l e .
Noise causing h e a r i n g damage has
been found t o c o r r e l a t e more c l o s e l y w i t h t h e A weighted scale, which
e x p l a i n s why t h i s p a r t i c u l a r c u r v e i s used most o f t h e t i m e i n n o i s e
a n a l y s i s .
The f o l l o w i n g p e r m i s s i b l e n o i s e e x p o s u r e t a b l e i s s p e c i f i e d by t h e
Walsh-Healey P u b l i c C o n t r a c t s A c t s as r e v i s e d i n 1970. It i s s u b j e c t t o
government r e v i s i o n s .
PERMISSIBLE N O I S E EXPOSURES
Hours
D u r a t i o n
P e r D a y
S P L
S l o w
Response
F i g u r e 18
page 20