The three cues according to George Thorn that helps to determine the position of sound are pinna effect, time delay and amplitude
Explanation:
The only part of the ear which is seen outside and it helps to determine the sound. It is the small structure of the skin surrounding the ear and it creates high frequency combined filtering effect as it combines with the direct sound. When there is a difference between the input and the output signal time delay occurs and the signals can be played multiple times or it can even be played in reverse.
When the displacement of a sound wave from its mean value occurs then it is called as amplitude and the change in the variation of the sound waves also causes amplitude change. These are the three cues which are defined by George Thorn to determine the position of sound
D. State boards of education are those who determine the content of textbooks. Obviously, students and students' parents have nothing to do with this decision. Ultimately, teachers don't either - they are there just to teach the material found in the textbooks.
