바람 검출을 위한 마이크로폰의 스피커 에뮬레이션

    公开(公告)号:KR20200143255A

    公开(公告)日:2020-12-23

    申请号:KR20200064100

    申请日:2020-05-28

    Applicant: APPLE INC

    Abstract: 전자디바이스의마이크로폰및 스피커를사용하여바람을검출하기위한방법. 이방법은마이크로폰에의해생성되는마이크로폰신호를획득한다. 이방법은스피커를통해환경에서의주변사운드를캡처하는마이크로폰을에뮬레이션하고있는스피커에의해생성되는스피커입력신호를획득한다. 이방법은마이크로폰신호와스피커입력신호사이의코히런스를결정하고, 코히런스가코히런스세기임계치미만인지여부를결정한다. 코히런스가코히런스세기임계치미만이라고결정한것에응답하여, 이방법은환경에서의바람의존재를결정한다.

    Pre-shaping series filter for active noise cancellation adaptive filter

    公开(公告)号:AU2013239736A1

    公开(公告)日:2014-09-11

    申请号:AU2013239736

    申请日:2013-03-27

    Applicant: APPLE INC

    Abstract: A feed forward active noise cancellation (ANC) system for use in a portable audio device has an adaptive digital filter and a reference microphone. A non-adaptive pre-shaping digital filter has an input coupled to the reference microphone and is in series with, and in front of, the adaptive filter. The pre-shaping filter is minimum phase and presents at least 2 dB more gain over a low audio frequency band than over a high audio frequency band. This may help compensate for low frequency band difficulties, and may thereby extend ANC bandwidth at the low end without a worsening impact on the high end. Other embodiments are also described and claimed.

    SPRECHERNACHBILDUNG EINES MIKROFONS ZUR WINDDETEKTION

    公开(公告)号:DE102020114146A1

    公开(公告)日:2020-12-17

    申请号:DE102020114146

    申请日:2020-05-27

    Applicant: APPLE INC

    Abstract: Ein Verfahren zum Detektieren von Wind unter Verwendung eines Mikrofons und eines Lautsprechers einer elektronischen Vorrichtung. Das Verfahren erhält ein Mikrofonsignal, das von dem Mikrofon erzeugt wird. Das Verfahren erhält ein Lautsprechereingangssignal, das von dem Lautsprecher erzeugt wird, der ein Mikrofon nachbildet, wobei Umgebungsgeräusche in einer Umgebung durch den Lautsprecher erfasst werden. Das Verfahren bestimmt eine Kohärenz zwischen dem Mikrofonsignal und dem Lautsprechereingangssignal und bestimmt, ob die Kohärenz unter einer Kohärenzintensitätsschwelle liegt. Als Reaktion auf das Bestimmen, dass die Kohärenz unter der Kohärenzintensitätsschwelle liegt, bestimmt das Verfahren das Vorhandensein von Wind in der Umgebung.

    Pre-shaping series filter for active noise cancellation adaptive filter

    公开(公告)号:AU2013239736B2

    公开(公告)日:2015-12-10

    申请号:AU2013239736

    申请日:2013-03-27

    Applicant: APPLE INC

    Abstract: A feed forward active noise cancellation (ANC) system for use in a portable audio device has an adaptive digital filter and a reference microphone. A non-adaptive pre-shaping digital filter has an input coupled to the reference microphone and is in series with, and in front of, the adaptive filter. The pre-shaping filter is minimum phase and presents at least 2 dB more gain over a low audio frequency band than over a high audio frequency band. This may help compensate for low frequency band difficulties, and may thereby extend ANC bandwidth at the low end without a worsening impact on the high end. Other embodiments are also described and claimed.

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