Question

Adding foam insulation to a house is a way of reducing noise pollution from outside the house. How does insulation reduce the amount of noise?



A. The insulation does not reduce the amount of noise coming into the house.
B. The insulation reflects the sounds back outside the house.
C. The insulation causes the sound waves to refract and spread throughout the house.
D. The insulation provides a barrier that does not transmit sound very well because of the air in the foam.