Subwoofer Cancellation Device

Stuck in traffic and hate that you are next to a pounding subwoofer in the car next to you? Well hate no more! Why not destroy that which your noisy neighbor loves instead? With a small microphone, a subwoofer amplifier, and a subwoofer of your own, you can create beautiful cancellation which effectively phases out loud thumping bass. (Not the fish-kind). The MIC hears the sound and sends it to the Sub-amp in real-time. (Not Fake Time, which is vastly more expensive) Your subwoofer is hooked to a phase cancellation device (Basically POS in NEG and NEG is POS) and the subwoofer (Being non-directional sound creation) will generate a canceling 'thump' which will greatly dampen (based on your decibel volume) the sound from outside thumping into your car. Place your cancellation woofer OUTSIDE your car and really get some canceling effect. Something like this in a much more complex form is used in SOME noise cancellation headsets and even in Lexus cars to electronically dampen outside noise including engine noise. Just for the record this is very much like trying to jump at the last minute in a falling elevator: In order to oppose the force you must have an equal force. So you must be able to jump as high as the building floor your elevator is falling from in the elevator analogy, or you must have an amplifier powerful enough to negate the outside noise minus the inside damping effect of the existing interior and insulation.

If you think about it, and you really should, you need to have a filter on your input to protect you from yelling on your cell phone and having it amplified through your contraption. Remember: The higher the frequency, the more directional the sound. A passive crossover on the input MIC of 100 or less Hz is perfect.