Active noise control in a helmet
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United States of America Patent
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Sep 6, 2022
Grant Date -
Jun 22, 2017
app pub date -
Dec 15, 2016
filing date -
Dec 16, 2015
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Abstract
Exemplary noise reducing methods and systems are configured to acoustically reproduce two electrical noise reducing signals at two opposing positions in a helmet; to pick up sound at positions in the vicinity of the positions where the noise reducing signals are reproduced; and to generate the two noise reducing signals from error-signals and reference-signals. For each noise reducing signal, the corresponding error-signal is generated from the sound picked-up at the same position where the respective noise reducing signal is reproduced; and the reference-signal is generated from the sound picked-up at the position where the respective other noise reducing signal is reproduced.
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