VIBRATION
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Answer |
In order to produce
a single pitch the tuning fork has narrow tines, so its
surface area is small, and since radiation to the
surrounding air is weak, so is the efficiency of energy
transfer. Attaching it (the correct acoustics term is coupling it) to the table increases the surface area, and allows a greater amplification of the vibration. In other words, the table acts as a resonator and the sound becomes louder even though no other energy has been added. |