Magic crickets, bringing thermometer features!

Speaking of crickets, are familiar. Especially after the beginning of autumn night, the grass, the corner edge, always can hear the loud crickets and rich sense of rhythm. The cool autumn wind blowing night, listen to the cry of the cricket rich rhythm, don't have a taste! Many people only know cricket chirps, autumn arrived, but know that there won't be much left their chirps and other functions. In fact, their chirps and the function of measuring temperature. American physicist professor bell is the first more attention to the environmental temperature and crickets chirp frequency relations scholars. The professor was first published in 1897 snow tree crickets cry is used to calculate the temperature of the formula. Specific formula is: TC = 10 + ( N - 40) TC / 7, here on behalf of the Celsius temperature, N is the number of crickets chirping per minute. This relation is defined as bell's law. Using his formula, according to a certain time to hear the crickets cry, can calculate the temperature of the probably. But professor dobell formula does not apply to all the crickets, because crickets chirp on the basis of different kinds and frequency, so the calculation method is also different. The later scholars, therefore, the formula for calculation of design more depending on the type of cricket to choose the right formula, can more accurately calculate the temperature. The TV drama 'the big bang theory' in the third quarter of the second concentration has the same scene, Shelton and Howard in eat together, suddenly heard their chirps. Shelton's hand watch immediately, after a few seconds later said: & other; According to the number of calls per minute, and combined with the environmental temperature of the room, this is a snow tree crickets. ” Shelton here is to use the formula to calculate the above. Believe that everyone is very curious, why the crickets have this function? Instrument decryption for you! Some cold-blooded animals body function in higher temperature run faster, the frequency of the cricket is like this, they sing is directly related to the temperature ( When the temperature is lower than 7 ℃, the crickets due to slow general no longer sing or frequency is very low; And the temperature is higher than 32 ℃, the need to drastically reduce the chirping crickets to save energy) 。 This is because living things are at the mercy of a chemical reaction, in general, the chemical reactions at high temperature is faster.