UNIFIED SYSTEM FOR THE DETECTION AND LOCATION OF SOUND, SUPER-SOUND AND RADIO-FREQUENCIES SOURCES OR OF OTHER -WAVE SOURCES - ESTIMATION OF THE RESPECTIVE FREQUENCY WITH NO DETECTION OF THE SYSTEM ITSELF

摘要

So far distance estimation has been carried out with the assistance of a reference point the distance of which was known by the observer. A question arises, however, as to whether the reference point could be found at the same measurement instrument. An answer to this question is given by the present construction.