# Exploration Guide Doppler Shift Advanced - Exploration...

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Exploration Guide: Doppler Shift Advanced Calculating Doppler Shift 1. a. The observed frequency of the sound waves is 1333.3 Hz. The Observed frequency is higher than the Source frequency which is 1,000 Hz. b. The original frequency was multiplied by a factor of 1.333 to get the observed frequency. c. v sound v source v sound - v source Observed Frequency Factor 240 60 180 1333.3 1.333 240 80 160 1500.0 1.5 240 120 120 2000.0 2 240 160 80 3000.0 3 240 180 60 4000.0 4 e. The relationship I see between the speed of sound between the first, third and fifth column is that the speed of sound is constant. The difference between the speed of sound and the speed of the source is that it decreases by 60 from the first column to the third column and from the third column to the fifth column. The factor by which the original frequency is multiplied is related to the speed of sound and the speed of the source. That is to say, the speed of sound divided by the difference between the speed of sound and the speed of the source is equal to the factor. f. = - Fobs ss v F

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g. v sound = s = 500 m/s v source = v = 120 m/s [Solve] = - Fobs ss v F = / / / Fobs 500 m s500m s 120 m s 1000 Hz = . Fobs 1315 79 Hz Yes, the answer I obtained from the equation was correct. 2. a. The observed frequency of the sound waves is 800 Hz and this is lower that the Source frequency.
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