| 摘要 |
In an ultrasonic transducer array in which plural kinds of ultrasonic transducers having different areas of ultrasonic transmission/reception surfaces are arranged, electric impedances among the ultrasonic transducers are made substantially equal. The ultrasonic transducer array, in which at least two kinds of ultrasonic transducers having different areas of ultrasonic transmission/reception surfaces from one another and having substantially equal total thicknesses to one another are arranged, includes: a first ultrasonic transducer; and a second ultrasonic transducer having a larger number of layers than that of the first ultrasonic transducer and a smaller area of an ultrasonic transmission/reception surface than that of the first ultrasonic transducer.
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