1. A filtering device for filtering an ultrasonic signal, the ultrasonic signal (19) being exposed to an electric module and containing a first part (A) containing information about an object (4) from which an ultrasonic signal (19) was received, and a second part (B ), which does not contain information about the object (4), while the filtering device (15) contains: - a correction signal determination module (17) for determining a correction signal indicating the effect of the electric module on the ultrasonic signal (19), from the second part (B) ultrasonic signal； - a correction module (18) for correcting the first part (A) of the ultrasonic signal (19) based on a specific correction signal in order to filter out the effect of the electric module (31) from the ultrasonic signal (19) .2. The filtering device according to claim 1, in which the correction module (18) is configured to subtract a specific correction signal from the first part (A) of the ultrasonic signal (19). 3. A filtering device according to claim 2, wherein the filtering device (15) comprises a module (16) for providing a fundamental frequency for providing a fundamental frequency of the effect exerted by the electric module； which corresponds to at least one cycle of exposure exerted by the electric module, depending on the provided fundamental frequency, and determining the correction signal depending on constant subpart of the second part (B) of the ultrasonic signal, - a correction unit (18) is adapted to you1. Фильтрующее устройство для фильтрации ультразвукового сигнала, причем ультразвуковой сигнал (19) подвергается воздействию электрического модуля и содержит первую часть (А), содержащую информацию об объекте (4), от которого был принят ультразвуковой сигнал (19), и вторую часть (В), не содержащую информацию об объекте (4), при этом фильтрующее устройство (15) содержит:- модуль (17) определения корректирующего сигнала для определения корректирующего сигнала, указывающего влияние электричес
