Processing device, ultrasonic device, ultrasonic probe, and ultrasonic diagnostic device

An ultrasonic device comprising:

• a substrate;
• a plurality of first ultrasonic elements having a resonance characteristic of a first frequency disposed on the substrate;
• and
• a plurality of second ultrasonic elements having a resonance characteristic of a second frequency, which is lower than the first frequency, disposed on the substrate,
• the plurality of first ultrasonic elements being arranged along a first direction to make a first high-frequency ultrasonic element line to an n-th high-frequency ultrasonic element line (n is an integer of more than 2),
• the plurality of second ultrasonic elements being arranged along the first direction to make a first low-frequency ultrasonic element line to an n-th low-frequency ultrasonic element line,
• the first high-frequency ultrasonic element line to the n-th high-frequency ultrasonic element line being arranged along a second direction which intersects with the first direction,
• the first low-frequency ultrasonic element line to the n-th low-frequency ultrasonic element line being arranged along the second direction,
• each of the first ultrasonic elements and each of the second ultrasonic elements having an opening provided in the substrate, a vibrating membrane that covers the opening, and a piezo element part provided on the vibrating membrane, and
• a length in the second direction of the opening of each of the first ultrasonic elements being shorter than a length in the second direction of the opening of each of the second ultrasonic elements.