Electroacoustic transducer

An electroacoustic transducer, comprising:

• a laminated piezoelectric element comprising alternately stacked piezoelectric layers and electrode layers, with the piezoelectric layers placed between at least one pair of electrode layers having different polarities;
• and
• a vibration plate on which the laminated piezoelectric element is placed;
• said electroacoustic transducer is characterized in that:
• the laminated piezoelectric element is polygonal in shape when viewed from a stacking direction;
• the vibration plate on which the laminated piezoelectric element is placed is circular in shape and made of a metal;
• and
• of the piezoelectric layers sandwiched between the at least one pair of electrode layers, a total volume (V) of effective layers that overlap the at least one pair of electrode layers as viewed from the stacking direction satisfies a condition below when V is approximated by a volume of the laminated piezoelectric element:
• 0.2πR2×ts≤V≤2.0πR2×ts
• (wherein π represents a ratio of a circumference of a circle to its diameter, R represents a radius of the vibration plate, and ts represents a thickness of the vibration plate).