Speaker with embedded piezoelectric transducer

A speaker, the speaker comprising:

• a housing forming a cavity;
• a coil disposed in the cavity;
• a flexible membrane coupled to the coil and disposed in the cavity, the flexible membrane being constructed at least partially of a piezo material;
• such that an electrical signal excites the coil to produce an electrical current, the electric current moving the coil, the movement of the coil responsively moving the membrane to produce sound energy;
• such that the speaker operates in a human audible frequency operating range and an ultrasonic frequency operating range;
• wherein in the ultrasonic frequency operating range the piezo material bends to extend the ultrasonic output beyond the ultrasonic frequency operating range produced without use of the piezo material in the membrane.

A speaker, the speaker comprising:

• an upper housing and a lower housing, the upper housing coupled to the lower housing and forming a cavity therebetween;
• a coil disposed in the cavity;
• a flexible membrane coupled to the coil and disposed in the cavity;
• such that an electrical signal excites the coil to produce an electrical current, the electric current moving the coil, the movement of the coil responsively moving the membrane to produce sound energy;
• a piezo electric layer disposed on at least one of a first lip of the upper housing and a second lip on the lower housing;
• such that the speaker operates in a human audible frequency operating range and an ultrasonic frequency operating range;
• wherein in the ultrasonic frequency operating range the piezo material bends to extend the ultrasonic output beyond the ultrasonic frequency operating range produced without use of the piezo material on the housing.