公开(公告)号：US20210368266A1

公开(公告)日：2021-11-25

申请号：US17324766

申请日：2021-05-19

Applicant: ASUSTEK COMPUTER INC.

Inventor： Tsung-Yen YU ,  Kuo-Yuan HUANG ,  Shih-Jie KUO ,  Yuan-Hao LO ,  Yen-Ming CHEN ,  Wei-Chi PAN

IPC: H04R3/04 ,  H04R5/04

Abstract: A handheld electronic device includes a first speaker, a second speaker, and an audio controller. The audio controller includes a signal receiving unit, a frequency crossover unit, a harmonic-wave generating unit, a low frequency enhancement unit, and a signal synthesis unit. The signal receiving unit receives an original sound signal and generates a first channel signal and a second channel signal according to the original sound signal. The frequency crossover unit sets a preset frequency crossover point to filter the first channel signal to generate a low frequency signal. The harmonic-wave generating unit generates harmonic waves according to the low frequency signal. The low frequency enhancement unit generates an enhancing low-frequency signal according to the harmonic waves. The signal synthesis unit generates a first channel enhanced signal according to the enhancing low-frequency signal and drives the first speaker.