摘要
本研究論文提出了主動噪音控制實施方案，用於減少嘈雜的家用電器產生的不必要的噪音。 具體來說，咖啡機和廚房抽油煙機用具位於房子裡最吵鬧的房間，即廚房。 在咖啡機主動噪音控制（ANC）實施中，進行了硬件仿真和實時實驗，以降低機器的噪音。 硬件模擬是使用內部有揚音器的聚苯乙烯泡沫塑料盒進行的，播放咖啡噪音的錄音。 採用濾波 x 最小均方 (FxLMS) 算法的反饋 ANC 系統用於降低噪音，實現 10 dB(A) 的全局降噪。 還進行了實時降噪實驗，使用無源材料對機器附近的麥克風實現了 10 dB(A) 的降噪。 為了減少廚房抽油煙機的寬帶噪音，測試了各種實驗裝置。 其中包括尋找最佳 ANC 算法和測試被動噪音控制 (PNC) 組件的不同設置。 還對誤差麥克風和參考麥克風的設計和放置進行了實驗，以獲得兩個信號之間的最佳一致性。 使用具有 Filtered-x 最小均方 (FxLMS) 算法的前饋 ANC 系統，可實現 6 dB(A) 的最大降噪。 在這些家用電器上實施 ANC 系統將有可能創造更安靜的家庭環
並列摘要
This research paper presents an active noise control implementation for reducing unwanted noise generated by noisy home appliances. The kitchen is considered the noisiest room in a house since food preparation appliances would have more mechanical movements thus creating more noise. Therefore, the appliances focused on this research are specifically found in the kitchen. The appliances targeted for active noise control (ANC) include a coffee machine and a kitchen hood. In the coffee machine active noise control implementation, hardware simulation, and real-time experiments were conducted to reduce the noise from the machine. The hardware simulation is implemented using a Styrofoam box with a speaker inside, playing a recording of coffee machine noise. A feedback ANC system with a filtered-x least-mean-square (FxLMS) algorithm is used to reduce the noise, achieving a 10 dB(A) global noise reduction. Real-time noise reduction experiments were also conducted, achieving 10 dB(A) noise reduction on microphones near the machine using passive materials. To reduce broadband noise from a kitchen hood, various experimental setups were tested. These included finding the optimal ANC algorithm and testing different setups of Passive Noise Control (PNC) components. The design and placement of error and reference microphones were also experimented with to obtain the best coherence between the two signals. Using a single channel feedforward ANC system with the Filtered-x Least Mean Squares (FxLMS) algorithm, a maximum noise reduction of 6 dB(A) was achieved. The implementation of ANC systems on these home appliances would provide the potential to create a quieter home environment and improve user experience.