ACOUSTIC OUTPUT DEVICE Russian patent published in 2023 - IPC H04R1/10 

FIELD: acoustics; speakers.

SUBSTANCE: acoustic output device contains an acoustic exciter containing the first diaphragm; the second acoustic pathogen containing the second diaphragm; a control circuit electrically connected to the first acoustic driver and the second acoustic driver, respectively. The control circuit is configured to provide a first electrical signal for excitation of vibration of the first diaphragm and a second electrical signal for excitation of vibration of the second diaphragm, and the phase of the first electrical signal and the phase of the second electrical signal are opposite; and a housing for the first acoustic driver and the second acoustic driver. The sound generated by the vibration of the first diaphragm is radiated outward through the first sound guide hole located on the body, and the sound generated by the vibration of the second diaphragm is radiated outward through the second sound guide hole located on the body, and the difference between the frequency response of the first acoustic driver and the amplitude-frequency characteristic of the second acoustic exciter in the medium-high frequency range does not exceed 6 dB.

EFFECT: increased sound volume, reduced sound leakage.

9 cl, 8 dwg