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Physics - Activity - solid sound-carriers

Activity - solid sound-carriers

Strike a tuning fork onto a small rubber mat and hold it in the air about
30 cm from your ear. Note the level of loudness. Now strike the tuning fork
again in a similar manner but this time place your ear and the base of the
tuning fork on the bench, 30 cm apart. Estimate how many times louder the
tuning fork is when the sound waves are carried by the solid bench; twice
as loud, 10 times louder, 100 times louder? Repeat the procedure a few
times before making your decision, taking care to strike the tuning fork
consistently. Now check what another person thinks. It is unlikely that all
students will agree. Why? The idea of the subjectivity of sound levels is
discussed later.

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