A-Level
EDEXCEL
Physics
October 2020
9 Marks
QP-202010-Physics-U2 · Question 13
Question (excerpt):
10 13 Active Noise Reduction (ANR) is a system used to reduce unwanted noise. In ANR a second sound wave is produced that cancels the first. ANR is used in aircraft to reduce the noise heard from the …
10 13 Active Noise Reduction (ANR) is a system used to reduce unwanted noise. In ANR a second sound wave is produced that cancels the first. ANR is used in aircraft to reduce the noise heard from the …
Question Slice Image
Official Mark Scheme & Solution
The official answer and mark scheme are available to signed-in users in the PaperAce App.