The discussion revolves around the phenomenon of audio cancellation, specifically whether two audio signals that are 180 degrees out of phase can cancel each other out in an open environment, such as space. The original poster describes an experiment using MATLAB to create a phase-shifted version of a song and observes cancellation when played together through mixer software, but not when played from separate sources.
The discussion is ongoing, with participants providing insights into the challenges of achieving audio cancellation in practical scenarios. Suggestions for experimental arrangements have been made, and there is acknowledgment of the complexities involved in setting up the experiment correctly.
Participants note the importance of using identical amplifiers to avoid unintended phase shifts and discuss the potential for reflections in different environments, indicating a need for careful consideration of experimental conditions.
Thanks for the suggestion..Scott said:When you say, "I play the actual and the shifted versions from different sources", I take that to mean that you are playing each through a speaker and listening to the result.
Assuming that is the case, the problem you will have is that you need to have both ears positioned an equal distance from each speaker (so that the phase and time delay are the same for both) and both must be of equal amplitude. Moreover, echoes created by the walls of the room and other items will still be heard - so an anechoic environment would be needed.
This is not an easy set up to arrange.
Yes. You may want a T shaped pipe with sound pushed through the top ends and the mike at the bottom. By adjusting the volume, you should be able to get that to work. Perhaps not creating silence, but at least a partial but very noticeable cancellation.Apoorv_7 said:Thanks for the suggestion.
I have been thinking of using a pipe and placing the two speakers on the ends and somehow keeping a microphone in the center.
Will an arrangement like this be beneficial?
Make sure you pass the two versions through identical amplifiers, otherwise there may be phase shifts you hadn't anticipated.Apoorv_7 said:I created a 180 degree phase shifted version of a song using matlab. They cancel each other out when i play them together using any mixer software,but do not do so when i play the actual and the shifted versions from different sources.