Improving the immunity to substrate noise using active noise cancellation circuit in mixed-signal integrated circuits

2003 ◽  
Author(s):  
N.R. Agung ◽  
S. Takagi ◽  
N. Fujii
Keyword(s):  
Integrated Circuits ◽  
Noise Cancellation ◽  
Substrate Noise ◽  
Mixed Signal ◽  
Active Noise Cancellation ◽  
Active Noise

Study of the Effects of Active Noise Cancellation on Music Playback

2021 ◽  
Author(s):  
Sattwik Basu ◽  
Jeffrey Tackett ◽  
David Trumpy ◽  
Adam Walt ◽  
Santosh Adari
Keyword(s):  
Noise Cancellation ◽  
Active Noise Cancellation ◽  
Active Noise

Active noise cancellation technique for highly accurate EB lithography systems

1997 ◽  
Author(s):  
Koji Nagata ◽  
Masahide Okumura ◽  
Norio Saitou ◽  
Hiroyoshi Ando ◽  
Toshiyuki Morimura ◽  
...  
Keyword(s):  
Noise Cancellation ◽  
Active Noise Cancellation ◽  
Active Noise

Regularized spherical harmonics-domain spatial active noise cancellation in a reverberant room

2021 ◽  
Vol 263 (2) ◽  
pp. 4733-4742
Author(s):  
Shoken Kaneko ◽  
Nirupam Roy ◽  
Nail Gumerov ◽  
Ramani Duraiswami
Keyword(s):  
Cost Function ◽  
Spherical Harmonics ◽  
Open Space ◽  
Microphone Array ◽  
Noise Cancellation ◽  
Target Area ◽  
Acoustic Environment ◽  
Active Noise Cancellation ◽  
Active Noise ◽  
Global Cost

Active Noise Cancellation (ANC) at a target area in an open space, as opposed to cancellation in the ears through headphones, can lead to future applications. For instance, a personal acoustic environment in an airplane seat or inside a car, or a quiet zone in a noisy shared workspace can be possible using such open-space ANC without any uncomfortable on-body audio equipment. Recent advancements reinforce the practicality of such systems. However, regularization of the cancellation signal has been a crucial challenge in open-space ANC as it causes amplification of noise at locations away from the target area. This work presents a spherical harmonics-domain feed-forward spatial ANC method with a room-wide global cost function to address this issue. This room-wide global cost function is used for optimizing the set of regularization hyperparameters, while at run time only local information captured by a microphone array surrounding the target listening zone is required. Numerical experiments applying the proposed method in a simulated reverberant room show the effectiveness of the proposed method in creating a specific zone of silence with low to moderate noise amplification in the rest of the room.

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