Section: Chemical and Physical Foundations of Biological Systems

37) In order to determine the doppler shift in perceived sound frequency, the following variables must be known:

1. speed of sound in medium
2. Time of interaction between sound source and detector
3. distance between source and detector
4. frequency of emitted sound

1. I only
2. I and III
3. II and IV
4. I an IV

The equation for calculating the doppler effect on perceived frequency relies on the actual frequency of emitted sound, speed of sound in the transmitting medium, and the relative velocities of the source and detector: doppler effect a) I only, incorrect, Choice IV is also required. b) I and III, incorrect, Distance is not a variable in the doppler equation. c) II and IV, incorrect, Time of interaction is not a variable in the doppler equation. d) I and IV, correct, Furthermore, the relative velocities of the detector and source are required.