公开(公告)号：US20250124909A1

公开(公告)日：2025-04-17

申请号：US18486267

申请日：2023-10-13

Applicant: Google LLC

Inventor： Liyang Rui ,  Guohua Sun ,  Lyle Nitta

IPC: G10K11/175 ,  H04R1/10

Abstract: Adaptive howling suppression is provided for active noise control (ANC) systems of wearable audio components (WACs), such as earbuds, based on detecting whether the WACs are presently being worn. Upon first detecting howling, embodiments can pre-suppress the howling audio signature by reducing ANC output. Then, embodiments detect whether the WAC is presently on-ear (worn) or off-ear and attempt to fully suppress the howling using different parameters, based on this detection. For example, if on-ear, embodiments use on-ear tuning settings to cycle through a set of suppression stages until ANC output can be restored without howling; if off-ear, embodiments use off-ear tuning settings to cycle through the set of suppression stages until ANC output can be restored without howling. Once ANC output can be restored without howling, the system can be released to a normal idle state.