In a recent ‘thought experiment’ I demonstrated that if an arrangement of 3 orthogonally arranged sound receivers equidistant from a sound projector were located on a movable platform, that there would be no difference in the received sound whether the platform was in motion, or not. Except. If a pulse of sound was sent [rather than a continuous sound] then differences of arrival times could be measured when the platform was in motion. To reach these findings, I assumed the speed of propagation was constant. I concluded that absent other means of detecting a medium for sound propagation, that data obtained from experiments totally contained on a moving platform, could not determine the existence of a medium. The differences in pulse arrival times were due to motion of the receivers during pulse transit period. So. The most fundamental proof that air is a medium for sound propagation is that placing a sound source in a bell jar and pumping the air out results in no sound. It is difficult to imagine how a similar experiment could be performed on an æther that certainly must consist of an n-dimensional arrangement of sub-neutrino mass that possibly exists ‘everywhere’. Since all Michelson-Morley type experiments involve both source and sensors being on the same moving platform, Earth, I conclude that the technique cannot prove or disprove the presence of an æther. But. Absent proof, can we settle for something that ‘implies’ an æther: A Constant Speed of Propagation.
