Page 10 - SoundWaveModule
P. 10

An organ pipe of length L is
                                                                          formed by 3/2 waves, where

                                                                            L = 3/2 λ then λ = 2/3 L

                                                                          The 2nd overtone equation is
        SECOND UPPER TONE











       Based on the data above, it can be concluded that the frequency of the nth upper tone in an open
       organ pipe can be determined by the formula









       The ratio of the frequency of the tones produced by the sound source in the form of an open organ
       pipe to the frequency of the underlying tone is an integer by comparison






       B. Closed Organa Pipe


       Closed organ pipe is characterized by one end of the pipe being closed.


                   TONE                             WAVE                          EQUATIONS



                                                                          If a 1/4 wave forms along the
                                                                          organ pipe, the tone it
                                                                          produces is called the
                                                                          fundamental tone

                                                                          L =  ⁄  λ then λ = 4L

                                                                          The closed organ pipe
        FUNDAMENTAL TONE                                                  equation for the fundamental
                                                                          note is
   5   6   7   8   9   10   11   12   13   14   15