公开(公告)号：US20240404500A1

公开(公告)日：2024-12-05

申请号：US18656509

申请日：2024-05-06

Applicant: Apple Inc.

Inventor： Hanchi CHEN ,  Jianjun HE ,  Mark P. NOON ,  Tony S. VERMA ,  Vladan BAJIC ,  Yang LU ,  Yue ZHAO ,  Esge B. ANDERSEN ,  Mitchell R. LERNER ,  Taylor G. CARRIGAN ,  Zhangli CHEN

IPC: G10K11/178

Abstract: Aspects of the subject technology provide for automatic adaptive noise cancellation, which may be provided with a substantially flat frequency response. In one or more implementations, a noise cancellation signal is combined with a pass-through audio signal with a ratio that is controlled based on a mixing curve. The mixing curve may be one of multiple mixing curves that are defined for multiple respective operational states of an electronic device.

公开(公告)号：US20200020313A1

公开(公告)日：2020-01-16

申请号：US16036806

申请日：2018-07-16

Applicant: Apple Inc.

Inventor： Thanh Phong HUA ,  Esge B. ANDERSEN ,  Tom-Davy W. SAUX ,  Scott C. GRINKER

IPC: G10K11/178 ,  H04R1/10

Abstract: A headphone has a driver, an internal microphone, an accelerometer, and an external microphone. An audio processor analyzes signals to detect wind noise. Gain of lower frequencies is reduced relative to higher frequencies, in a first filter that is operating on an audio signal from the external microphone in a feedforward path, responsive to detecting increased wind noise. A second filter in an audio signal feedback path may be adjusted to compensate for the gain change in the first filter that may mitigate occlusion effect. Outputs of the feedforward path in the feedback path are combined to produce an audio signal for the driver. The driver produces sound in the aural canal that has transparency with reduced wind noise, relative to sound external to the headphone. Other aspects are also described and claimed.