Ink jet printers operating on the Piezoelectric transducer principle also use valveless pumping. A sound wave is typically produced by a piezoelectric transducer encased in a plastic housing. This made possible new designs, e.g. a hybrid magnetostrictive-piezoelectric transducer. An orthomode transducer (OMT) is a waveguide component. YIG is also very efficient as an acoustic energy transmitter and transducer. A small single cylindrical ceramic transducer can achieve near perfect omnidirectional reception. Or a 1-D phased array transducer may be used to sweep the beam electronically. GM-CSF signals via signal transducer and activator of transcription, STAT5. Some dive computers can receive a signal from more that one remote pressure transducer. Commonly a specialized probe that mechanically scans a conventional 2-D image transducer is used. The acoustic pulse is emitted by a transducer which receives the return echo as well. Internal Cardiotocography uses an electronic transducer connected directly to the fetal scalp. The lateral resolution is determined by the focal diameter of the transducer. Loudspeakers consist of a transducer and mechanical moving parts. The peak pressure recorded by a shore-mounted transducer was .