The sound above what level is considered as harmful?
Q. The sound above what level is considered as harmful?
A. above 40 db
B. above 60 db
C. above 80 db
D. above 120 db
Answer: above 80 db
A. above 40 db
B. above 60 db
C. above 80 db
D. above 120 db
Answer: above 80 db