Question

When we increase the number of vibrations per second then:

• A. frequency decreases.
  
• B. pitch decreases.
  
• C. the sound becomes flat.
  
• D. the sound becomes shrill.
  

Answer 1

The correct option is D the sound becomes shrill.


Frequency is also defined as the number of vibrations per second. Also, we know that when we increase the frequency then pitch also increases and vice versa. A sound with higher frequency is shrill and with a lower frequency is flat. Therefore, when we increase the number of vibrations then frequency and pitch will also increase and sound will become shrill.