Question

1. Name a 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 loudness of sound is measured?

Answer 1

1. Resonance.
2. Resonance is the phenomenon in which a vibrating system forces another system having the same natural frequency to vibrate with large amplitude.
3. Loudness is the sensation by which a loud sound is distinguished from a faint sound.
4. Sound level is measured in decibels (dB).