elektroakustiline seade, mis kasutab ultrahelimuundurit ultraheli impulsside ülekandmiseks (saatmiseks või vastuvõtuks või mõlemaks); seade, mis mõõdab objekti kaugust ultrahelilaineid kasutades (vt ultrahelitehnika)
an instrument that measures the distance of an object using ultrasonic sound waves; a ultrasonic sensor uses ultrasonic trasnsducer to send and receive ultrasonic impulses that relay back information about an objects proximity (see:uiltrasonics)
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