scholarly journals THE REDUCTION EFFECT OF CONSTRUCTION MACHINERY NOISE BY FEEDFORWARD TYPE ACTIVE NOISE CONTROL

2017 ◽  
Vol 82 (732) ◽  
pp. 97-103 ◽  
Author(s):  
Laura KANAZAWA ◽  
Kenji YASUI ◽  
Katsuo YAGINUMA
Keyword(s):  
Noise Control ◽  
Active Noise Control ◽  
Construction Machinery ◽  
Active Noise ◽  
Reduction Effect

Active noise control without secondary path modeling: algorithm and implementation

2021 ◽  
Vol 263 (5) ◽  
pp. 1919-1928
Author(s):  
Xing Ren ◽  
Hongwei Zhang
Keyword(s):  
Noise Reduction ◽  
Noise Control ◽  
Fitness Function ◽  
Active Noise Control ◽  
Path Model ◽  
Lms Algorithm ◽  
Abc Algorithm ◽  
Active Noise ◽  
Line Identification ◽  
Reduction Effect

Active noise control (ANC) has been intensively studied for decades. The most classical ANC algorithm should be the filtered-x least mean square (FxLMS) algorithm, which needs the model of the secondary path to work. Thus, the residual error of the ANC system is closely related to the preciseness of the secondary path model. In many applications, the secondary path is often time-varying. Therefore, off-line identification of the secondary path is not applicable. However, on-line identification often requires an additional white noise as a stimulating signal of the secondary path, which will deteriorate the final noise reduction effect. This paper proposes an improved artificial bee colony (ABC) algorithm for ANC system, which does not require identification of the secondary path. In order to guarantee the convergence of the algorithm and accelerate the convergence speed, this paper introduces a variable forgetting factor into the fitness function, and improves the traditional ABC algorithm by integrating LMS algorithm into the ABC algorithm. A single channel ANC system equipped with an FPGA hardware platform is set up in an anechoic chamber, and experiments show that the proposed algorithm can produce a satisfactory noise reduction effect without modeling the secondary path.

APPLICATION OF ACTIVE NOISE CONTROL TO AN ELEVATOR CABIN

2002 ◽  
Vol 35 (1) ◽  
pp. 67-72 ◽  
Author(s):  
J. Landaluze ◽  
I. Portilla ◽  
N. Cabezón ◽  
A. Martinez ◽  
R. Reyero
Keyword(s):  
Noise Control ◽  
Active Noise Control ◽  
Active Noise
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