Description

Sound & Vibration is a journal intended for individuals with broad-based interests in noise and vibration, dynamic measurements, structural analysis, computer-aided engineering, machinery reliability, and dynamic testing. The journal strives to publish referred papers reflecting the interests of research and practical engineering on any aspects of sound and vibration. Of particular interest are papers that report analytical, numerical and experimental methods of more relevance to practical applications.

 

This journal is an indispensable reading and publishing area for all scientists, researchers, engineers, university and professional teachers, industrialists, and people in business interested in inventing, developing, implementing, commercializing, and using processes and products based totally or partly on sound and vibration.

 

Starting from Volume 59, 2025, Sound & Vibration will be published by Academic Publishing. As of 5 September 2024, new submissions should be made to the Open Journal Systems. To view your previous submissions, please access TSP system.

 

Papers are sought that contribute to the following general topics: 

    1. broad-based interests in noise and vibration
      2. dynamic measurements
        3. structural analysis
          4. computer-aided engineering
            5. machinery reliability
              6. dynamic testing

Latest Articles

  • Open Access

    Article

    Article ID: 2372

    Innovative intelligent and expert system of bridges damage identification via wavelet packet energy curvature difference method integrated with artificial intelligence algorithms

    by Wael A. Altabey

    Sound & Vibration, Vol.59, No.2, 2025;

    Bridges are important infrastructure for highways. Monitoring their status is of great significance to ensure safe operations. In this work, a novel integrated technique from wavelet packet energy curvature difference (WPECD) and artificial intelligence (AI) for bridge damage identification is established. Initially, the damages are simulated in the bridge decks by changing the material stiffness reduction levels of bridge elements by three levels (5%, 10%, 15%) to study the effect of damage on the bridge response. Then the WPECD maps are plotted from vibration response before and after damage to the bridge for each stiffness reduction level. Unfortunately, given the nonlinearity of damage geometry, it is not easily feasible to use WPECD maps for damage identification accurately. Therefore, the (WPECD) maps are used for training a new architecture of recurrent neural networks with long short-term memory blocks (RNN-LSTM) for bridge damage identification by predicting the wavelet functions and wavelet decomposition layer effect of each node in the bridge. The effectiveness and reliability of the proposed approach were confirmed by numerical and experimental results. The performance of the proposed technique achieved high scores of accuracy, regression, and F-score equal to 93.58%, 90.43% and 88.17% respectively indicating the applicability of the proposed method for use on other important highway infrastructure.

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  • Open Access

    Article

    Article ID: 2358

    Scrutinizing highly nonlinear oscillators using He’s frequency formula

    by Gamal M. Ismail, Galal M. Moatimid, Ibrahim Alraddadi, Stylianos V. Kontomaris

    Sound & Vibration, Vol.59, No.2, 2025;

    Highly nonlinear oscillators are examined in their capacity to simulate intricate systems in engineering, physics, biology, and finance, as well as their diverse behavior, rendering them essential in the development of resilient systems and technological advancement. Therefore, the fundamental purpose of the current work is to analyze He’s frequency formula (HFF) to get theoretical explanations of many types of very nonlinear oscillators. We investigate, in both analytical and computational, the relationship between elastic forces and the solution of a specific oscillator. This oscillator exhibits significant nonlinear damping. It is assumed that the required quantity of trigonometric functions matches the solution of a strong nonlinear ordinary differential equation (ODE) that explains the motion. The novel approach definitely takes less processing time and is less complex than the traditional perturbation methods that were widely used in this field. This novel method, which is essentially giving a linearization of the nonlinear ODE, is known as the non-perturbative approach (NPA). This procedure produces a new frequency that is similar to a linear ODE, much as in a fundamental harmonic scenario. Readers will benefit from an in-depth account of the NPA. The theoretical findings are validated by numerical examination using Mathematical Software (MS). The theoretical and numerical solution (NS) tests yielded fairly similar findings. It is a well-established principle that classical perturbation methods trust on Taylor expansions to approximate restoring forces, therefore simplifying the current situation. When the NPA is used, this vulnerability does not present. Furthermore, the NPA enables a thorough assessment of the problems’ stability analysis, which was a not possible using prior conventional methodology. Consequently, the NPA is a more appropriate responsibility tool for examining approximations in extremely nonlinear oscillators in MS.

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  • Open Access

    Article

    Article ID: 2025

    Noise suppression of high-speed cavity treated with leading and trailing edge spoilers

    by Yang Liu , Dongping Yin, Dangguo Yang, Yong Luo, Fangqi Zhou, Bin Dong, Ronghui Ning, Chunhui Yan

    Sound & Vibration, Vol.59, No.2, 2025;

    High-speed cavity flow and the induced noise have been continuously investigated in the aerospace industry. They may not only influence the performance of instruments inside the cavity, but also cause fatigue damage to the structures, which threaten the safety of aircraft. Therefore, cavity noise suppression is practically important. In this work, the leading edge sawtooth, the leading edge cylinder, and the trailing edge contouring are employed to suppress high-speed cavity noise at Mach numbers of 2.0, 2.5, 3.0, 3.5, and 4.0. Wind tunnel tests were performed to study the influence of the control parameters associated with these suppression methods. The results show that the leading edge sawtooth and cylinder are able to effectively suppress cavity noise at Ma = 2.0, 2.5, but prove ineffective at Ma = 3.0, 3.5, and 4.0, suggesting that the critical Mach number locates between 2.5 and 3.0. Above the critical Mach number, cavity noise would increase. In comparison, the noise suppression effect of the trailing edge contouring is relatively minor, and it shows a monotone decreasing trend as Mach number increases from 2.0 to 4.0.

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  • Open Access

    Article

    Article ID: 1941

    Identification of vehicle suspension shock absorber rattle noise based on wavelet packet feature fusion and GWO-LSTM

    by Jie Hou, Hongwei Yi, Xingyu Xiang, Xiangyu Ni, Ruxue Dai, Xiaorong Huang

    Sound & Vibration, Vol.59, No.2, 2025;

    With the advancement of pure electric vehicles, the issue of rattle noise in suspension shock absorbers has increasingly become a critical factor affecting vehicle comfort. This paper proposes a method for rattle noise recognition based on wavelet packet feature fusion and the grey wolf optimizer-long short-term memory (GWO-LSTM) model, aimed at improving the accuracy and efficiency of rattle noise detection. The vibration signals of the shock absorbers are decomposed by wavelet packet decomposition (WPD), followed by extraction of wavelet packet energy (WPE) and wavelet packet fuzzy entropy (WPFE) features and feature fusion. Subsequently, the GWO algorithm is employed to optimize the hyperparameters of the LSTM model, enhancing classification performance. The results demonstrate that, compared to traditional methods, the GWO-LSTM model significantly improves classification accuracy and training efficiency, achieving an accuracy rate of 97.85%, particularly excelling in the recognition of both slight and serious rattle noise. This study provides an efficient and reliable solution for the automated evaluation of shock absorbers’ rattle noise.

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  • Open Access

    Article

    Article ID: 2707

    Investigation of acoustic properties of rubber diaphragm

    by Ziyu Wang

    Sound & Vibration, Vol.59, No.2, 2025;

    Large amplitude and high damping play a crucial role in improving sound quality and low-frequency performance of loudspeakers, making it widely applied in electronic devices such as cellphones, tablets, and laptops. However, traditional moving-coil loudspeakers have poor damping performances, and the diaphragm of which is prone to fracture when a large excursion is applied. In this study, a novel ethyl acrylate rubber (AEM) diaphragm was fabricated through solvent casting and thermoforming and assembled to make moving-coil microspeakers (i.e., miniature loudspeakers) with excellent frequency response, amplitude, and damping performances. Meanwhile, the acoustic properties of microspeakers with different diaphragm samples were compared, and the relationships between resonance frequency and elastic modulus in the linear elastic range, the resonance frequency, and mechanical resistance of total-driver losses were revealed and validated by the calculations of mechanical stiffness of driver suspension and mechanical Q-factor of driver. The microspeakers with diaphragm samples “AEM-90-5” fabricated in this study exhibit significant and symmetric excursions; meanwhile, the acoustic properties of microspeakers in the future studies could be optimized by compositions and elastic modulus based on these samples.

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  • Open Access

    Article

    Article ID: 2144

    Improve the safety and performance of internet of things assessment devices: From vibration characteristics, interpretable method of knowledge, and ‎combining data

    by Chafaa Hamrouni, Aarif Alutaybi, Ghofrane Ouerfelli, Nahaa Eid B Alsubaie

    Sound & Vibration, Vol.59, No.2, 2025;

    This research focuses on enhancing the safety, reliability, and performance of IoT devices by optimizing the vibration characteristics of materials and noise control. We analyze materials’ vibration-damping properties to minimize mechanical resonance and ensure stable operation. By evaluating stiffness and resistance to deformation under dynamic stress, we examine the impact of vibration modulus on device reliability. Our study explores how damping and modulus influence vibrational energy propagation, noise reduction, and acoustic clarity. To integrate domain knowledge with real-time data, we develop interpretable methods that provide actionable insights into the mechanical-acoustic relationship. Compared with other established IoT security assessment techniques, this method has more effectiveness and superiority. Hybrid materials combining elastic matrices with rigid reinforcements are developed to fine-tune mechanical and acoustic properties for IoT applications, such as industrial systems or wearable devices. Vibration analysis is applied to predict performance under real-world conditions, improving safety and efficiency. Efforts are directed toward reducing vibrational noise and enhancing sound transmission for devices like smart speakers and voice recognition systems, ensuring a better user experience and greater functional accuracy.

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  • Open Access

    Article

    Article ID: 2600

    New scaling of critical damping and reduced frequency for mechanically excited systems

    by Md. Mahbub Alam

    Sound & Vibration, Vol.59, No.2, 2025;

    This paper introduces a universal framework for understanding the vibration responses of systems subjected to harmonic excitation. By examining a simplified cylinder-spring-damper model, the study refurbishes traditional scaling methods for the excitation frequency ratio and critical damping ratio. The findings indicate that in damped systems, the maximum amplitude of vibration does not align with the natural frequency. This observation leads to the introduction of a new scaling method for reduced frequency. This new approach aligns resonance peaks at the new reduced velocity of 1.0 across different damping ratios, providing a consistent characterization of vibration behavior. A new critical damping ratio of 0.707 is identified for an excited system as opposed to the traditional damping ratio of 1.0 for an unexcited system. Key properties such as maximum amplitude, phase lag, bandwidth, and quality factor are analyzed, demonstrating that the proposed reduced frequency and critical damping ratio effectively capture the dynamics of both damped and undamped excited systems. The findings offer significant insights for practical applications in engineering and various scientific fields.

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  • Open Access

    Editorial

    Article ID: 2627

    Vibration: A bibliometric analysis

    by João Paulo Davim

    Sound & Vibration, Vol.59, No.2, 2025;

    Vibration is a mechanical phenomenon in which oscillations occur around an equilibrium point. The Scopus database was used for the bibliometric analysis, based on the term {vibration}. The better result shows in the function of the number of documents produced: year 2024; source Proceedings of SPIE; author Inman, D.J.; affiliation Ministry of Education of China; country China; document type article; scientific area Engineering and funding support National Natural Science Foundation of China.

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Announcements

38th Symposium on Hydroacoustics 2025 is open for registration

2025-03-06

We are delighted to announce that our journal will be partnering with the SHA2025 conference, contributing to its success through our support. Currently, SHA2025 is open for registration to scholars worldwide. We encourage you to stay informed about the conference developments and plan your schedule accordingly.
We look forward to the successful outcome of this conference.

Read more about 38th Symposium on Hydroacoustics 2025 is open for registration