- #1
jangchen
- 12
- 3
- Homework Statement
- An avant-garde composer wants to use the Doppler effect in his new opera. As the soprano sings, he wants a large bat to fly toward her from the back of the stage. The bat will be outfitted with a microphone to pick up the singer's voice and a loudspeaker to rebroadcast the sound toward the audience. The composer wants the sound the audience hears from the bat to be, in musical terms, one half-step higher in frequency than the note they are hearing from the singer. Two notes a half-step apart have a frequency ratio of 21/12 = 1.059. With what speed must the bat fly toward the singer?
- Relevant Equations
- f' = f×(c+v/c) , f''=f'×(c/c-v)
I don't know what is wrong
i think
when bat gets sound
f' = f×(c+v/c)
when audience hears
f''=f'×(c/c-v)
f''=f×1.059
but it is wrong TT
i think
when bat gets sound
f' = f×(c+v/c)
when audience hears
f''=f'×(c/c-v)
f''=f×1.059
but it is wrong TT