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APPLICATION OF SOUND WAVES

CONTENT

  1. Wind Instruments
  2. String Instruments
  3. Percussion Instruments
  4. Beats
  5. Uses of Beats
  6. The Doppler Effect

 

Wind Instruments

Wind instruments are classified as aerophones. They produce sounds when air is blown into them. Sound is produced in these instruments because the air column in them vibrates. Whether the instrument is a closed pipe or an open pipe, the air column determines the quality of the note produced. The frequency ‘f’ of the note depends mainly on the length ‘l’ of the vibrating column and it is inversely proportional to it, i.e \(∝ \frac{1}{l}\). A short column of air will produce a high pitch while a long column of air will produce a high pitch. Typical examples of wind instruments are, flutes, clarinets, saxophones, trumpets, mouth organ e.t.c

 

String Instruments

String instruments are also called chordophones. They are instruments that use stretched strings or chords and operates based on the equation:

\(f = \frac{1}{2l} \sqrt{\Big(\frac{T}{m}\Big)}\)

This means that the frequency is inversely proportional to the length ‘l’ of the string, directly proportional to the square root of the tension ‘T’ on the string and inversely proportional to the square root of the mass ‘m’ per unit length of the string.

Lesson tags: Physics Lesson Notes, Physics Objective Questions, SS2 Physics, SS2 Physics Evaluation Questions, SS2 Physics Evaluation Questions Third Term, SS2 Physics Objective Questions, SS2 Physics Objective Questions Third Term, SS2 Physics Third Term
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