Patent ID: 11955108
Assignee: AIROHA TECHNOLOGY CORP.
Field: Other consumer goods (Other fields)
Classification: CPC G  H | IPC G  H

Claim 24:
25. The audio playback system according to claim 15, wherein the audio playback system is a hybrid active noise cancellation headphone, wherein the interference signal is a restored environmental noise signal, and the audio playback system comprises:
an external noise receiving microphone receiving an external audio noise, and converting the external audio noise to a second interference signal, wherein the adaptive active noise cancellation apparatus further comprises:
an active noise filtering unit receiving a second interference signal, outputting a second anti-phase noise signal for generating the anti-phase noise audio signal; and
a third adder circuit receiving the anti-phase noise signal and the second anti-phase noise signal, and adding the anti-phase noise signal to the second anti-phase noise signal,
wherein the audio playback system outputs an anti-phase noise audio signal according to the anti-phase noise signal and the second anti-phase noise signal.