Measuring Temperature With Crickets Creaking Sound



To measure the surrounding air temperature, people usually count on a thermometer. If you live in a countryside or a quiet place, you can try do this with a natural way by listening to the crickets creaking sound. Creak..creak..creak..

The creaking sound of cricket derives from the friction created between its wings and other body parts. Its voice is very distinct and clearly audible at a less noisy environment.

A Male Cricket On Foliage

Not all crickets can creak, only male crickets can do that. The voice is like a melodious song, which is sung to attract female crickets.

Besides this natural female attractor, rhythmic creaking sound of the crickets can also be used to estimate the outdoor temperature. The more often you hear the creaking sound of a cricket, the hotter the ambient temperature at that time.

Quoted from Snopes, Wednesday (07/21/2010), experiments to prove this theory had started in 1897 by an American physicist, Amos Dolbear. His theory of the crickets thermometer is now known as Dolbear's Law.

Many years since this discovery, formula about the relationship between the creaking sound and the temperature continues to grow. But among the various available formulas, the most frequently used is as follows:

  • To estimate the temperature in Fahrenheit, count the number of creaks within 14 seconds then add 40. (T = n + 40)
    For example: 30 creaks + 40 = 70 degrees Fahrenheit
  • To estimate the temperature in Celsius, count the number of creaks within 25 seconds, and then divided by three plus four. (T = (n / 3) + 4)
    For example: (48 creaks / 3) + 4 = 20 degrees Celsius

That formula was proven by Dr. Peggy LeMone, scientists of The Globe Program in 2007 experiments funded by NASA. In his report he concluded that the formula is very close to actual temperature, measured with a thermometer.

But Dr Peggy noted that, the formula should be used at temperatures above 55 degrees Fahrenheit (12.78 degrees Celsius). Because if it is too cold, male crickets usually are not eager to call the female.

Now you have known the formula, what are you waiting for..? Let's start counting the creaks.. Hehe.. Good luck..





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