Results 21 to 30 of about 13,769,555 (242)

Dental drill noise reduction using a combination of active noise control, passive noise control and adaptive filtering [PDF]

open access: yes, 2007
Dental drills produce a characteristic high frequency, narrow band noise that is uncomfortable for patients and is also known to be harmful to dentists under prolonged exposure. It is therefore desirable to protect the patient and dentist whilst allowing
Kaymak, E   +3 more
core   +3 more sources

Internal Model Control for a Light-Weight Active Noise-Reducing Casing

open access: yesArchives of Acoustics, 2016
The active noise-reducing casing developed and promoted by the authors in recent publications have multiple advantages over other active noise control methods.
Krzysztof MAZUR, Marek PAWEŁCZYK
doaj   +1 more source

A review of active noise and vibration control in road vehicles

open access: yes, 2008
Active control works by destructive interference between the original sound or vibration field in the vehicle and that generated by a controllable, secondary, source. Physical limitations generally confine its usefulness to low frequencies and so that it
Elliott, S.J.
core   +2 more sources

Improvement of frequency source phase noise reduction design under vibration condition [PDF]

open access: yesITM Web of Conferences
Reasonable vibration reduction design is an important way to achieve low phase noise index of airborne frequency source output signal. Aiming at the problem of phase noise deterioration of an airborne frequency source under random condition, this paper ...
Yin Liwei   +4 more
doaj   +1 more source

Feedforward Control of a Light-Weight Device Casing for Active Noise Reduction

open access: yesArchives of Acoustics, 2016
It is possible to enhance acoustic isolation of the device from the environment by appropriately controlling vibration of a device casing. Sound insulation efficiency of this technique for a rigid casing was confirmed by the authors in previous ...
Stanislaw WRONA, Marek PAWELCZYK
doaj   +1 more source

Experimental Study of Active Noise Control on The Motor of A UAV Aircraft Noise Vibration Centre Using A DLE Gas Engine 30

open access: yesJournal of Emerging Supply Chain, Clean Energy, and Process Engineering
Abstrak—The noise that occurs at the USU UAV Noise and Vibration Center ranges between 90-100 dB. The engine used is a 2-stroke engine which certainly has high noise. The engine drive motor determines the high rotation and contributes to the noise. The method used to reduce noise is ANC. ANC in this study focused only on the drive motor.
A Alfisyahrin   +3 more
openaire   +1 more source

Electromagnetic Design and Analysis of Inertial Mass Linear Actuator for Active Vibration Isolation System

open access: yesActuators, 2023
Underwater radiated noise from anthropogenic structures must be reduced to protect the marine environment. Active vibration isolation that can reduce noise generated from vibration sources by providing counteracting forces can solve this issue.
Do-Kwan Hong, Jang-Hyun Park
doaj   +1 more source

Advances in Sustainable and Wearable Textile Based Soft Robotics

open access: yesAdvanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas   +6 more
wiley   +1 more source

A Review of Vibration Control Studies of Double-Layered Cylindrical Shells Under Transient Excitation in Water

open access: yesJournal of Marine Science and Engineering
In recent years, with the wide application of underwater vehicles, the vibration and noise problems generated during their operation have attracted great attention from the academic community.
Zhen Zhang, Yinglong Zhao, Feng Chen
doaj   +1 more source

Quantification of active bearing input force for vibration reduction performance of unbalanced rotor systems

open access: yesScientific Reports, 2023
Recently, rotating machinery has been widely applied in various mechanical systems such as hydroelectric and nuclear power plants. When mechanical systems are operated, the main rotor is rotated to manufacture the product. If a fault occurs in the rotor,
Dongwoo Hong   +3 more
doaj   +1 more source

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