ACOUSTIC OUTPUT DEVICE Russian patent published in 2023 - IPC H04R17/00 

FIELD: acoustics.

SUBSTANCE: invention relates to piezoelectric sound emitters. The acoustic output device contains a vibration assembly, a piezo element and a vibration element. The piezoelectric structure is designed to convert an electrical signal into mechanical vibrations; and the vibration element is connected to the piezo element and is configured to receive mechanical vibrations to generate an acoustic signal. The device also contains a weight that is connected to a piezoelectric structure. The piezoelectric element is made in the form of a beam. The beam is fixed at one end, and the ratio of the distance between the place where the load is attached and the fixed end of the beam structure to the length of the beam structure is greater than 1/3. Meanwhile, in the range of 50 Hz to 5000 Hz, the vibration characteristic of the piezoelectric structure at the first location has a resonant peak and a resonant dip, and the mass element reduces the amplitude difference between the resonant peak and the resonant dip. The ratio of the elastic coefficient between the mass element and the piezoelectric structure to the mass of the mass element is within (100π)² - (10000π)².

EFFECT: improved sound quality in the mid and low frequency bands.

10 cl, 21 dwg