In quiet unconfined air sound travels in concentric spherical waves, consisting of successive condensations andrarefactions of the medium.
These arcs were the result of the successive condensations andrarefactions of the air constituting waves of sound--visible sound waves.
The position of the striae was generally such, that the rarefactions corresponded to the places of incandescence or greater brightness on the wire w.
Sound waves may be said to consist of a series of condensations and rarefactions, and the distance between two consecutive condensations and rarefactions may be defined as the wave length.
These condensations and rarefactions constitute what we call waves of sound.
But you can also imagine a state of things where the condensations of the one system fall upon the rarefactions of the other system.
In any tone having a fundamental and harmonics (multiples), the wave-train consists of a complex series of condensations and rarefactions of the air or other transmitting medium.
What occurs is that the vibrations of the sound-producer cause alternate condensations and rarefactions of the air.
In air, sound vibrations consist of successive condensations and rarefactions tending to proceed outwardly from the source in all directions.
The cause of the waves in a defective unison is the alternate recurring of the periods when the condensations and rarefactions correspond in the two strings and then antagonize.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "rarefactions" in a variety of sentences. We hope that you will now be able to make sentences using this word.
