Watch the video and count how many cycles were highlighted. One cycle is the measurement from peak to peak.Calculate the frequency of the sound wave using equation 1.

The beat frequency can be calculated if the frequencies of the two tuning forks are known with the following equation.
𝑏𝑒𝑎𝑡 𝑓𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦012304 = |𝑓5 − 𝑓6 | (2)
The beat frequency is the difference between two frequencies. This can be determined graphically by
highlighting the beats and the time for the highlighted beats. Just like determining frequency of two tuning
forks, to determine the beat frequency, use the equation below.
𝑏𝑒𝑎𝑡 𝑓𝑟𝑒𝑞𝑢𝑒𝑛𝑐𝑦789 = # :; <702= 2>?7 ;:@ <702= (=) (3)
Video Data Links:
Tuning Fork Data
256C3 https://youtu.be/Cv_KXvvCaZE
288D3 https://youtu.be/awWVrTr1hjI
320 E3 https://youtu.be/AEALeqrcH18
341.3F3 https://youtu.be/krs8a5fktCo
384G3 https://youtu.be/ju_ZaAhhrhc
426.7A3 https://youtu.be/PZiPpcJfX6o
480B3 https://youtu.be/gHtvEV00WZs
512C4 https://youtu.be/kzpngr5f0zk
Beats Data
Beats A426 7 & B480 https://youtu.be/HdR9EwG_nSU
Beats B480 & C512 https://youtu.be/bwq-YQaW8fM
Beats C256 & D288 https://youtu.be/a9NgC_JVP38
Beats D288 & E320 https://youtu.be/eAE8klA7QC4
Beats E320 & F341.3 https://youtu.be/2-VhdUBQNG4
Beats F341 3 & G384 https://youtu.be/mfSlrGgLxPc
Beats G384 & A426 7 https://youtu.be/aJAUQvCNChc
PROCEDURE
Part 1 – Measuring the Frequency of a Tuning Fork
1. Select one tuning fork from the video links above.
2. Record the tuning fork frequency from the name of the video.
3. Watch the video
a. Watch the video and count how many cycles were highlighted. One cycle is the
measurement from peak to peak.
b. Example: One cycle is marked on the graph below.
c. The computer will measure the time of the highlighted area. This is located at the
bottom left of the screen, denoted at Δt. Record the Δt for the highlighted area.
4. Calculate the frequency of the sound wave using equation 1.
5. Calculate the percent error.
6. Repeat this experiment for a second tuning fork

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