Horizontal Active Noise Control Based on Wave Field Reproduction Using a Single Circular Array in 3D Space

Round 1

Reviewer 1 Report

The manuscript addresses the use of a two-dimensional wave field in order to introduce Active Noise Control (ANC).

The introduction provides a good overview of the current state of the art, with relevant and up-to-date references, as well as a good and detailed explanation of the subject of the topic.

The methodology is properly described and the results support the statement in the text.

Nevertheless, there are some issues that should be addressed prior to the acceptance and publication of this manuscript:

1.      In the introduction of the manuscript, it is written that “the wave field of the noise source must be removed”. In my opinion, a more accurate term is to “suppress” or to “counteract” the wave field.

2.      Eq. (1): The variable c is not defined in the text.

3.      The experimental measurements have been carried out by using a periodic signal of a single frequency (200 Hz). What is the result when a different frequency at very low frequencies (40-50 Hz) or at higher frequency (1500-2000 Hz) is used?

4.      Has the method proposed by the authors tested with “noise” (e.g., white or pink)?

Author Response

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Author Response File: Author Response.docx

Reviewer 2 Report

The work is well developed, in such a way that the specialist and non-specialist public can understand it. I congratulate the good investigation carried out. For publication, I only suggest updating the references, since of the 24 references, 17 are from more than 5 years ago.

Author Response

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Author Response File: Author Response.docx

Reviewer 3 Report

In this paper, authors introduce horizontal active noise control (ANC) method using two-dimensional wave field information alone. By reducing the control space to a horizontal plane, the number of microphones and speakers is greatly reduced compare with ANC systems using three-dimensional wave field information. The authors claim that an average noise reduction of 20 dB was observed inside the microphone array with a radius of 0.5 m for tonal noise at 200 Hz, and this performance is acceptable with a drastically reduced number of microphones and speakers.

 Comments and suggestions:

 

1. In the introduction, I would like the scientific novelty to be more emphasized and more obvious.
2. The quality of the pictures could be better. For example, pictures of Figure 3, Figure 5, Figure 7 could be clearer.
3.  In my opinion, the conclusions of this work are too long, and should be shortened, emphasizing the main results obtained, the advantages of this method compared to the works of other authors. If such wide conclusions are to be presented, the article should include a discussion section, in which all this material should be presented.

Overall merit: The paper covers quite a practical type of this study which could be interesting to both industry and the scientific community. I'd suggest accepting this paper with minor revisions after addressing the comments and suggestions above.

Author Response

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Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

First of all, I want to thank the authors for the effort in the revision of the manuscript.

After having confirmed the modifications made in the document and the answer to my questions and concerns, I have no further comments to add to the review.