ULTRASONIC TRANSDUCERS

摘要

An ultrasonic transducer for generating or receiving compression waves in a fluid, comprising an elongated metal body (22) which terminates in an active surface (24), means (21) for exciting or responding to surface acoustic waves, as hereinbefore defined, in the elongated metal body, and means (23, 26) for acoustically isolating all but the active surface of the body from a fluid in which the compression waves are to be generated or from which they are to be received. Two forms of the transducer are described, one (fig. 1) intendend for total immersion in a fluid, and the other (fig. accompanying abstract) in the form of a rod for insertion in the fluid.