公开(公告)号：US11715483B2

公开(公告)日：2023-08-01

申请号：US16899474

申请日：2020-06-11

Applicant: Apple Inc.

Inventor： Yang Lu ,  Fatos Myftari ,  Vasu Iyengar ,  Aram M. Lindahl

IPC: G10L21/034 ,  G10L21/0208 ,  G10K11/178 ,  H03G3/30 ,  H04R1/10

CPC classification number: G10L21/034 ,  G10K11/17853 ,  G10L21/0208 ,  H03G3/301 ,  H04R1/1091 ,  G10K2210/1081 ,  G10K2210/3218 ,  H04R2460/01

Abstract: Aspects of the subject technology relate to a device including a microphone, a filter and a processor. The filter receives an audio signal including ambient noise and a voice of a user of the device from the microphone. At least a portion of ambient noise is filtered from the audio signal. The processor determines a level of the ambient noise in the received audio signal and dynamically adjusts a gain applied to the filtered audio signal based on the level of the ambient noise.

公开(公告)号：US11935512B2

公开(公告)日：2024-03-19

申请号：US17746930

申请日：2022-05-17

Applicant: Apple Inc.

Inventor： Yang Lu ,  Andrew P. Bright ,  Fatos Myftari ,  Vasu Iyengar

IPC: G10K11/178

CPC classification number: G10K11/17853

Abstract: Aspects of the subject technology provide for generation of a self-voice signal by an electronic device that is operating in an active noise cancellation mode. In this way, during a phone call, a video conference, or while listening to audio content, a user of the electronic device may benefit from active cancellation of ambient noise while still being able to hear their own voice when they speak. In various implementations described herein, the concurrent self-voice and automatic noise cancellation features are facilitated by accelerometer-based control of sidetone and/or active noise cancellation operations.

公开(公告)号：US09467779B2

公开(公告)日：2016-10-11

申请号：US14276988

申请日：2014-05-13

Applicant: Apple Inc.

Inventor： Vasu Iyengar ,  Fatos Myftari ,  Sorin V. Dusan ,  Aram M. Lindahl

IPC: H04R3/04 ,  H04R3/00 ,  H04R1/08

CPC classification number: H04R3/04 ,  H04R1/08 ,  H04R3/002 ,  H04R3/005 ,  H04R2499/11

Abstract: Digital signal processing for microphone partial occlusion detection is described. In one embodiment, an electronic system for audio noise processing and for noise reduction, using a plurality of microphones, includes a first noise estimator to process a first audio signal from a first one of the microphones, and generate a first noise estimate. The electronic system also includes a second noise estimator to process the first audio signal, and a second audio signal from a second one of the microphones, in parallel with the first noise estimator, and generate a second noise estimate. A microphone partial occlusion detector determines a low frequency band separation of the first and second audio signals and a high frequency band separation of the first and second audio signals to generate a microphone partial occlusion function that indicates whether one of the microphones is partially occluded.

Abstract translation: 描述了用于麦克风部分遮挡检测的数字信号处理。 在一个实施例中，使用多个麦克风的用于音频噪声处理和降噪的电子系统包括第一噪声估计器，用于处理来自第一麦克风的第一音频信号，并产生第一噪声估计。 电子系统还包括第二噪声估计器，用于处理第一音频信号，以及来自第二麦克风的第二音频信号与第一噪声估计器并行并产生第二噪声估计。 麦克风部分遮挡检测器确定第一和第二音频信号的低频带分离以及第一和第二音频信号的高频带间隔，以产生指示麦克风中的一个是否被部分遮挡的麦克风部分闭塞功能。