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Join Date: Nov 2006
Location: Colorado Springs, CO
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Out of phase implies that an input wave arrives at your ears at different times from multiple speakers. There are multiple ways this could happen. Speaker location, accoustics, or somewhere in your signal path are three ways I can think of.
In other words, a instant moment in time of an audio track would ideally arrive at your ears at the same time for each speaker it was playing out of.
If the sound from two speakers are arriving in phase, they will reinforce each other - ideally, a 3 dB gain if I am not mistaken.
If the sounds arrive 180 degrees out of phase, they will negate each other. This is the principle behind noise reduction headphones.
If the sounds somewhere in between, they can either reinforce or reduce each other depending.
"But this one goes up to 11"