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Dr Helen Czerski examines the world of sound waves.
1988
6.9
2014
3.0
2015
0.0
2009
8.0
2013
8.1
5.5
2010
6.6
7.3
2005
7.0
2016
10.0
5.9
8.2
8.3
1999
1964
7.4
1998
2017
2018
9.3
2020
9.8
2011
6.0
1987
6.7
8.9
6.5
5.0
1981
8.4
2021
7.5
1956
2025
9.6
2024
2022
