公开(公告)号：US20240171898A1

公开(公告)日：2024-05-23

申请号：US17992633

申请日：2022-11-22

Applicant: Juan A. Ovalle

Inventor： Juan A. Ovalle

IPC: H04R1/24 ,  H04R1/28

CPC classification number: H04R1/24 ,  H04R1/28

Abstract: A headphone set includes a novel passive filter for processing an audio signal. The filter circuit uses three major sections. A parallel resistor and capacitor in series with the speaker, a series capacitor and resistor in parallel with the speaker, and a series inductor and capacitor in parallel with the speaker, with values changing relative to the combined impedance of the first two sections. The first section serves as a controlled high pass filter and the second section serves as a controlled low pass filter. The third section reduces overall impedance in order to reduce differences between the lowest and highest impedance on the spectrum established by the first two sections in order to maintain a consistent response across amplifiers which would otherwise have a more drastic effect on the filter values due to highly variable impedance being affected by an amplifiers output load.