A. When two tones or notes sounded together produce an agreeable effect on the ear, their combination is called a ... A. It consists of seven notes, which are distinguished by the seven first letters of the alphabet, or by the seven syllables do, re, mi, fa, ... at a certain vibration, the depression of one wave will be filled with the elevation of the other, and no sound is heard; ... aamp;c. ; pulsatory instruments, as bells, gongs, drums, aamp;c. ; instruments in which the sound depends on the vibrations ofanbsp;...
|Title||:||Science popularly explained|
|Author||:||David Ames Wells|