Question

The membrane of a drum vibrates to produce sound. Similarly the string of a sitar vibrates to produce sound. Based on the two examples, answer the following question.
Which part of the whistle vibrates to produce sound?
A. Body of whistle
B. Air
C. Mouth of the person
D. All off the above

Answer 1

Hint:We know that the sound travels through a medium by alternately contracting and expanding parts of the medium it is travelling through. This compression and expansion produce a minute pressure difference that is known as sound. The main thing which produces the sound is the to and fro motion of the body which is known as Vibration.

Complete answer:
We know that when we blow the whistle, a whistle forces air through the mouthpiece's rectangular tube until it runs into a slotted edge. The slot divides the air in two, creating oscillating sound waves that then tumble around the resonant chamber, or barrel. As the compressed air escapes from the hole on the other end, it creates an audible pitch. The pitch frequency is determined by length, longer whistles produce lower pitches and shorter whistles produce higher pitches.

Some whistles have a ball inside the chamber, often made of cork or synthetic cork that bounces around, further disturbing the molecules to create a trilling effect. Steam whistles use steam to propel the air, which can make them quite loud.From this, we can say that the body of the whistle vibrates to produce the sound.

Hence, option A is the right answer.

Note:We have seen that vibration causes sound production. When an object vibrates then the air around it also vibrates and carries that sound to our ears through the vibration of molecules. Also, the energy required to make an object vibrate and produce sound is produced by some external forces like wind. Some vibrations of sounds can be seen with our eyes and some can be felt by only touching with our hands.