Two tuning forks are played at the same time in a room wherethe velocity of soun

Question

Two tuning forks are played at the same time in a room wherethe velocity of sound is 340 m/s. One of them has a frequency of340 Hz and the other a frequency of 360 Hz. a) What is the beat frequency? b) What is the succesive time between beats? Part II If these two sounds go through a 5 m wide door a) which soundfrequency is more widely diffracted through the door? b) Estimatethe diffraction angle for these two sounds using the width of thedoor. Two tuning forks are played at the same time in a room wherethe velocity of sound is 340 m/s. One of them has a frequency of340 Hz and the other a frequency of 360 Hz. a) What is the beat frequency? b) What is the succesive time between beats? Part II If these two sounds go through a 5 m wide door a) which soundfrequency is more widely diffracted through the door? b) Estimatethe diffraction angle for these two sounds using the width of thedoor.

Explanation / Answer

     (a)    f1 = 340 Hz            f2 =360 Hz            Beatfrequency, f = f2 - f1                                     = 20 Hz      (b)            Timebetween successive beats = Time period                                                        = 1 / f                                                        = ( 1 / 20 ) s                                                        = 0.05 s

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