Design of feedforward active noise control for helmet headset
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Xi′an iFLYTEK Hyper-Brain Information Technology Co., Ltd., Xi′an 710076, China

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TN642

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    Abstract:

    Aiming at the problem of complex factors affecting the objective transfer function of the feedforward controller and the problem of incorrect acoustic test with head and torso simulator in the process of design helmet active noise control headset a method of designing feedforward controller based on human wearing test data is proposed. The principle of active noise control headset is analyzed, which makes up the deficiency of existing theories. Experiments are designed to verify the influence of noise source direction, ear pad elasticity, feedback controller, bandage elasticity, helmet and testing device on the target transfer function of the feedforward controller, some recommendations are proposed. The feedforward controller is designed based on the data of human wearing test, and the effect of hybrid active noise control is tested when it cooperates with the feedback controller. The noise reduction 21.3 dB when the human is wearing, but 10.7 dB when the head and torso simulator is wearing, which proves that the noise reduction effect of headset based on the human wearing test design is better, and the head and torso simulator wearing cannot reflect the human wearing situation very well.

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  • Received:
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  • Online: January 15,2024
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