yes. if two speakers are out of phase they will cancel each other out. it is most noticable in lower frequencies such as in subwoofers.
A Collision occurs when two transmissions interfere with each other.
They can't interfere.
collission
collision
Interfere with each other. This interference can be either constructive or destructive.
It isn't "gauging" its stretching. But anyways, yes they can depending on how big you stretch both piercings. Pierce your second hole to where you can stretch each piercing and not get too close.
Eqach is
No - they will interfere with each other's signal.
Since revolving and rotating are independent motions, they do not interfere with each other.
Standing wave If they do a great job, the wave practically disappears.
Since revolving and rotating are independent motions, they do not interfere with each other.
Different frequencies won't interfere with each other.