公开(公告)号：US20210193104A1

公开(公告)日：2021-06-24

申请号：US17102325

申请日：2020-11-23

Applicant: GN AUDIO A/S

Inventor： Sidsel Marie NØRHOLM

IPC: G10K11/178 ,  G10L25/78 ,  G10L25/18 ,  H04R1/40 ,  H04R3/00 ,  H04R3/04

Abstract: A method at a wearable electronic device with: a first electro-acoustic input transducer and a second electro-acoustic input transducer arranged to pick up a first acoustic signal and convert the first acoustic signal to a first microphone signal and second microphone signal; and a third electro-acoustic input transducer arranged to pick up a second acoustic signal and convert the second acoustic signal to a third microphone signal; and a processor (140). The method comprises: generating a beamformed signal based on the first microphone signal (x1) and the second microphone signal; estimating a first frequency value representing a fundamental frequency in one or more of: the first microphone signal, the second microphone signal and the third microphone signal; configuring a first filter with one or more passbands at one or more integer multiples of the first frequency value and one or more stop bands adjacent the one or more stop bands; and filtering, using the first filter, one or more of: the first microphone signal, the second microphone signal and the beamformed signal.

公开(公告)号：US20250104684A1

公开(公告)日：2025-03-27

申请号：US18830119

申请日：2024-09-10

Applicant: GN Audio A/S

Inventor： Valiantsin BELYI ,  Yurii IOTOV ,  Sidsel Marie NØRHOLM

IPC: G10K11/178 ,  H04R1/10

Abstract: A feedforward active noise cancellation system comprising one or more reference microphones, one or more loudspeakers, one or more error microphones, a first filter, and a second and adaptive filter. The first filter is configured to filter a first input signal to minimize a residual error. The second and adaptive filter comprises a linear predictor of speech. The second and adaptive filter is configured to filter a second input signal based on predicted speech to compensate for a processing delay and a second propagation delay exceeding a first propagation delay.