3. What is an Elementary sound?
One that cannot be divided so as to be represented by two or more letters.
4. What is Sound?
A sensation produced on the auditory nerve by the rapid vibratory motion of any elastic substance.
5. What is the least number of vibrations that will produce an audible sound?
Sixteen per second.
6. What is the greatest number that can be heard?
About forty thousand per second.
7. What is Voice?
Sound produced by the vocal chords.