Overview of Noise Control Techniques and Methods

González, Alice Elizabeth

doi:10.5772/intechopen.104608

Cited by 2 publications

(3 citation statements)

References 27 publications

(33 reference statements)

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“…The noise reduction techniques are divided into active or passive flow management methods [188]. The active kind, such as plasma actuators or synthetic jets, involves the controlled alteration of flow-field parameters.…”

Section: Passive Noise Reduction Mechanismsmentioning

confidence: 99%

Recent Advances in Airfoil Self-Noise Passive Reduction

Amirsalari,

Rocha

2023

Aerospace

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Airflow-induced noise prediction and reduction is one of the priorities for both the energy and aviation industries. This review paper provides valuable insights into flow-induced noise computation, prediction, and optimization methods with state-of-the-art efforts in passive noise reduction on airfoils, blades, and wings. This review covers the combination of several approaches in this field, including analytical, numerical, empirical, semi-empirical, artificial intelligence, and optimization methods. Under passive noise reduction techniques, leading and trailing edge treatments, porous materials, controlled diffusion airfoils, morphing wings, surface treatments, and other unique geometries that researchers developed are among the design modification methods discussed here. This work highlights the benefits of incorporating multiple techniques to achieve the best results concerning the desired application and design. In addition, this work provides an overview of the advantages and disadvantages of each tool, with a particular emphasis on the possible challenges when implementing them. The methods and techniques discussed herein will help increase the acoustic efficiency of aerial structures, making them a beneficial resource for researchers, engineers, and other professionals working in aviation noise reduction.

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Section: Passive Noise Reduction Mechanismsmentioning

confidence: 99%

Recent Advances in Airfoil Self-Noise Passive Reduction

Amirsalari,

Rocha

2023

Aerospace

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“…L w s = L v s + 10 log S s S 0 + 10 log σ s + 10 log ρc (ρc) 0 (6) The radiation factor was obtained by analyzing the relation between the intensity and the velocity of certain areas under a controlled excitation of the washing machine. The excitation was applied using an electromagnetic shaker coupled to the structure of the washing machine.…”

Section: Radiation Factormentioning

confidence: 99%

“…There are several techniques available for noise control, but this does not necessarily imply the reduction of noise emissions from the sources. Instead, it is possible to apply techniques to reduce noise transmission and propagation, and protection techniques for the receivers [6]. In the field of home appliances, only the first two types of techniques are applicable.…”

Section: Introductionmentioning

confidence: 99%

Experimental Methodology to Characterize the Noise Paths in a Horizontal-Axis Washing Machine

Albero

Sánchez-Tabuenca

2023

Acoustics

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In this paper, an experimental methodology to characterize the noise paths in a washing machine with a horizontal axis was developed. The noise paths considered in this research were the noise that escapes through holes, the non-resonant path through the panels, and the noise radiated by the panels of the cabinet. The characterization method was based on several sound intensity measurements on the outside panels of the washing machine. In addition to these measurements, characterization of the radiation factor was performed by applying a method that relates intensity and vibration measurements while the structure of the washing machine is excited using a shaker. Applying the methodology to a washing machine, the main transmission path of the noise along the frequency domain where this home appliance has its highest values was identified. This methodology can provide the manufacturer with a guide to improve the acoustic performance of washing machines by applying noise control solutions in the noise path depending on the frequency domain.

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Overview of Noise Control Techniques and Methods

Cited by 2 publications

References 27 publications

Recent Advances in Airfoil Self-Noise Passive Reduction

Recent Advances in Airfoil Self-Noise Passive Reduction

Experimental Methodology to Characterize the Noise Paths in a Horizontal-Axis Washing Machine

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