Name the phenomenon involved in tuning a radio set to a particular station

1. Name the phenomenon involved in tuning a radio set to a particular station.
2. Define the phenomenon named by you in part (i) above.
3. What do you understand by loudness of sound?
4. In which units is the loudness of sound measured?

Answer

1. Resonance
2. Resonance is a particular case of forced vibration in which the frequency of forced vibrations is equal to the natural frequency of the body and the body begins to vibrate with increased amplitude.
3. Loudness as magnitude of the auditory sensation
4. bel / dB / phon

• Exam Year: 2016