ACOUSTIC PROPERTY MEASURING DEVICE FOR THE BUBBLE WAKE OF A SHIP, WHICH USES A VARIABLE TRANSMISSION SIGNAL, CAPABLE OF ADAPTIVELY VARYING THE LENGTH AND THE FREQUENCY OF AN ACOUSTIC SIGNAL IN THE SURROUNDING ENVIRONMENT

摘要

PURPOSE: An acoustic property measuring device for the bubble wake of a ship is provided to reliably measure the acoustic sound of a bubble wake of a ship.;CONSTITUTION: A wake measuring unit(20) generates an acoustic transmission signal and transmits it. A bubble wake is measured through the acoustic receiving signal coming back with the bubble according to the sailing of the ship. A measurement controller(30) selects the length of the acoustic transmission signal and the fundamental frequency in which the bubble wake property represents as the frequency of the acoustic transmission signal.;COPYRIGHT KIPO 2011