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Answer:
It varies with fork to fork.
Step-by-step explanation:
This question is not related to biology.
You can study detail in physics where we read about change in frequency produce different kind of sound.
The quartz crystal that serves as the timekeeping element in modern quartz clocks and watches is in the form of a tiny tuning fork. It usually vibrates at a frequency of 32,768 Hz in the ultrasonic range (above the range of human hearing).