- #1
isisfierce
- 5
- 0
1. Two piano strings are supposed to be vibrating at 128 Hz, but a piano tuner hear three beats every 2 seconds when they're played together
a) If one is vibrating at 128 Hz, what must be the difference between their frequencies?
Answer - 3 Beats Per Two Seconds, Frequency Diff = 1.5
b) By how much in percent must the tension be increased or decreased to bring them in tune?
-- B is where I'm stuck on. I have the two equations v= lambda x frequency and
velocity = sqrt ( Tension / mass per length )
So I set both of them equal to each other and found that the Tension is proportional to the Frequency Squared?? I'm not sure if this is the right direction :( And if it is I tried putting in the number percent but it didn't work ( Sqrt 1.5 )
a) If one is vibrating at 128 Hz, what must be the difference between their frequencies?
Answer - 3 Beats Per Two Seconds, Frequency Diff = 1.5
b) By how much in percent must the tension be increased or decreased to bring them in tune?
-- B is where I'm stuck on. I have the two equations v= lambda x frequency and
velocity = sqrt ( Tension / mass per length )
So I set both of them equal to each other and found that the Tension is proportional to the Frequency Squared?? I'm not sure if this is the right direction :( And if it is I tried putting in the number percent but it didn't work ( Sqrt 1.5 )