公开(公告)号：US11026041B2

公开(公告)日：2021-06-01

申请号：US16751738

申请日：2020-01-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Zhangli Chen ,  Brenton Steele ,  Thomas Ivan Harvey

IPC: H03G5/00 ,  H04S7/00 ,  H04R3/04 ,  H04R5/04 ,  H04R5/033

Abstract: A method of equalising sound in a headset comprising an internal microphone configured to generate a first audio signal, an external microphone configured to generate a second audio signal, a speaker, and one or more processors coupled between the speaker, the external microphone, and the internal microphone, the method comprising: while the headset is worn by a user: determining a first audio transfer function between the first audio signal and the second audio signal in the presence of sound at the external microphone; and determining a second audio transfer function between a speaker input signal and the first audio signal with the speaker being driven by the speaker input signal; determining an electrical transfer function of the one or more processors; determining a closed-ear transfer function based on the first audio transfer function, the second audio transfer function and the electrical transfer function; and equalising the first audio signal based on a comparison between the closed-ear transfer function and an open-ear transfer function to generate an equalised first audio signal.

公开(公告)号：US10595151B1

公开(公告)日：2020-03-17

申请号：US16356218

申请日：2019-03-18

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Zhangli Chen ,  Brenton Steele ,  Thomas Ivan Harvey

IPC: H03G5/00 ,  H04S7/00 ,  H04R3/04 ,  H04R5/04 ,  H04R5/033

Abstract: A method of equalising sound in a headset comprising an internal microphone configured to generate a first audio signal, an external microphone configured to generate a second audio signal, a speaker, and one or more processors coupled between the speaker the external microphone, and the internal microphone, the method comprising: while the headset is worn by a user: determining a first audio transfer function between the first audio signal and the second audio signal in the presence of sound at the external microphone; and determining a second audio transfer function between a speaker input signal and the first audio signal with the speaker being driven by the speaker input signal; determining an electrical transfer function of the one or more processors; determining a closed-ear transfer function based on the first audio transfer function, the second audio transfer function and the electrical transfer function; and equalising the first audio signal based on a comparison between the closed-ear transfer function and an open-ear transfer function to generate an equalised first audio signal.