dB SPL Sound Source (with distance) - Brian K. Shepard

Sound Wave Phase Position
0º Phase
(or 360º)
90º Phase
� Position in the cycle of a wave is measured in degrees.
� 0º - Beginning of Compression Phase = 360º - End of Rarefaction Phase
� 90º - Peak of Compression Phase
� 180º - Beginning of Rarefaction Phase
� 270º - Peak of Rarefaction Phase
MUEA 474a – 02 Sound and Acoustics
180º Phase
270º Phase
360º Phase
(or 0º)