Exercises
1. Give an illustration from your own experience of each of the factors affecting intensity.
2. Write the relative vibration numbers of a major scale in which do has 120 vibrations.
3. What is the wave length of the "A" of international concert pitch at 25°C.? Compute in feet and centimeters.
4. At what temperature will sound waves in air in unison with "Middle C" be exactly 4 ft. long?
5. Explain the use of a megaphone.
6. What tone has waves 3 ft. long at 25°C.?
7. What is the purpose of the "sounding board" of a piano?
8. Two men are distant 1000 and 3000 ft. respectively from a fog horn. What is the relative intensity of the sounds heard by the two men?