Pub Date : 2025-03-10DOI: 10.1016/j.apacoust.2025.110647
Yo-Han Seong , Sin-Tae Kim , Myung-Jun Kim
This study examines the influence of frequency filters on the evaluation of floor impact sound insulation by comparing the performances of Butterworth and FFT-based filters. Experimental data were collected from 15 residential units with identical floor plans to reflect on-site conditions. The findings reveal that even when the filters comply with IEC 61260-1 Class 1 standards, performance differences exist depending on the type of impact source and evaluation method. For light-weight impact sounds, which are assessed using time-averaging equivalent continuous sound levels, the 12th-order or higher Butterworth filters provided results comparable to those of the FFT-based filter. For heavy-weight impact sounds, which are evaluated using fast time-weighting followed by the maximum sound level, the FFT-based filter showed distinct characteristics, including higher frequency resolution and independence from stabilization time. These features suggest that FFT-based filters may offer advantages in postprocessing over traditional Butterworth filters. This study underscores the importance of understanding filter performance variations in impact sound insulation for regulatory compliance and calls for further investigation of filter selection in practical applications.
{"title":"Effects of the frequency filter type of measurement equipment on evaluation of floor impact sound insulation","authors":"Yo-Han Seong , Sin-Tae Kim , Myung-Jun Kim","doi":"10.1016/j.apacoust.2025.110647","DOIUrl":"10.1016/j.apacoust.2025.110647","url":null,"abstract":"<div><div>This study examines the influence of frequency filters on the evaluation of floor impact sound insulation by comparing the performances of Butterworth and FFT-based filters. Experimental data were collected from 15 residential units with identical floor plans to reflect on-site conditions. The findings reveal that even when the filters comply with IEC 61260-1 Class 1 standards, performance differences exist depending on the type of impact source and evaluation method. For light-weight impact sounds, which are assessed using time-averaging equivalent continuous sound levels, the 12th-order or higher Butterworth filters provided results comparable to those of the FFT-based filter. For heavy-weight impact sounds, which are evaluated using fast time-weighting followed by the maximum sound level, the FFT-based filter showed distinct characteristics, including higher frequency resolution and independence from stabilization time. These features suggest that FFT-based filters may offer advantages in postprocessing over traditional Butterworth filters. This study underscores the importance of understanding filter performance variations in impact sound insulation for regulatory compliance and calls for further investigation of filter selection in practical applications.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110647"},"PeriodicalIF":3.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-10DOI: 10.1016/j.apacoust.2025.110668
Jiati Li , Bin Wang , Yiwang Huang
This paper presents an underwater acoustic communication scheme that combines the modal dispersion compensation with the channel adaptive equalization to address the challenge of low spectral efficiency in the low-frequency long-range underwater communication in shallow water. We designed both the transmitter and receiver to improve the communication efficiency by eliminating the spread spectrum in the transmitted signal. At the receiver, the de-dispersion transform compensated for the preamble, enhancing the frame synchronization accuracy. The proposed dispersion compensation method addressed the non-instantaneous pulses, eliminating the nonlinear phase distortion in the received signal. The adaptive equalization further compensated for the frequency-selective fading caused by multipath propagation. The simulation and experimental results demonstrated that this scheme significantly enhanced the spectral efficiency, particularly in the channels with severe dispersion.
{"title":"A new scheme of low frequency long range underwater acoustic communication with high spectral efficiency","authors":"Jiati Li , Bin Wang , Yiwang Huang","doi":"10.1016/j.apacoust.2025.110668","DOIUrl":"10.1016/j.apacoust.2025.110668","url":null,"abstract":"<div><div>This paper presents an underwater acoustic communication scheme that combines the modal dispersion compensation with the channel adaptive equalization to address the challenge of low spectral efficiency in the low-frequency long-range underwater communication in shallow water. We designed both the transmitter and receiver to improve the communication efficiency by eliminating the spread spectrum in the transmitted signal. At the receiver, the de-dispersion transform compensated for the preamble, enhancing the frame synchronization accuracy. The proposed dispersion compensation method addressed the non-instantaneous pulses, eliminating the nonlinear phase distortion in the received signal. The adaptive equalization further compensated for the frequency-selective fading caused by multipath propagation. The simulation and experimental results demonstrated that this scheme significantly enhanced the spectral efficiency, particularly in the channels with severe dispersion.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110668"},"PeriodicalIF":3.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-10DOI: 10.1016/j.apacoust.2025.110639
Meng Cao , Kang Qin , Peng Ren , Fengchen Luo , Siyu Liu
Photoacoustic imaging, an imaging method combining optical and ultrasound technologies, possesses advantages like high resolution, deep penetration, and non-invasiveness, thus finding wide application in the biomedical field. To achieve photoacoustic imaging of deep tissue, acoustic-resolution photoacoustic microscopy typically uses reconstruction algorithms to correct raw signals. However, currently used reconstruction algorithms commonly have requirements for the measured medium, resulting in poor imaging quality when the medium is irregularly layered. In this paper, the phase shift interpolation method is used to achieve photoacoustic imaging in irregularly layered media. This method extrapolates the wave field based on reference velocities selected from the actual sound velocity distribution, and then interpolates the reference wave field to obtain the actual wave field. Simulation and experimental results demonstrate that phase shift interpolation can achieve high-quality imaging in irregularly layered media.
{"title":"Phase shift plus interpolation based photoacoustic imaging in layered media","authors":"Meng Cao , Kang Qin , Peng Ren , Fengchen Luo , Siyu Liu","doi":"10.1016/j.apacoust.2025.110639","DOIUrl":"10.1016/j.apacoust.2025.110639","url":null,"abstract":"<div><div>Photoacoustic imaging, an imaging method combining optical and ultrasound technologies, possesses advantages like high resolution, deep penetration, and non-invasiveness, thus finding wide application in the biomedical field. To achieve photoacoustic imaging of deep tissue, acoustic-resolution photoacoustic microscopy typically uses reconstruction algorithms to correct raw signals. However, currently used reconstruction algorithms commonly have requirements for the measured medium, resulting in poor imaging quality when the medium is irregularly layered. In this paper, the phase shift interpolation method is used to achieve photoacoustic imaging in irregularly layered media. This method extrapolates the wave field based on reference velocities selected from the actual sound velocity distribution, and then interpolates the reference wave field to obtain the actual wave field. Simulation and experimental results demonstrate that phase shift interpolation can achieve high-quality imaging in irregularly layered media.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110639"},"PeriodicalIF":3.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-09DOI: 10.1016/j.apacoust.2025.110641
Yiqing Gu, Yue Feng, Jiuhong Jia, Shan-Tung Tu
Ultrasonic transducers play a critical role in structural health monitoring, particularly in high-temperature environments. In this work, nano-Ag coupled transducer is tested through insulation, cooling, and reheating stages to assess the acoustic performance and investigate underlying mechanisms. The results show that the stability of the resonance frequency indicated that its core acoustic properties are not significantly affected after operating at 350 °C for 60 h. Long-term high-temperature operation indicated a decline in SNR due to Kirkendall voids from non-equilibrium diffusion. Increases in the mechanical coupling coefficient and quality factor suggest a self-healing mechanism facilitated by grain boundary migration and atomic diffusion. Waveform distortions arose from thermal stress and mismatched thermal expansion coefficients in reheating.
{"title":"Acoustic stability and self-healing mechanism of nano-Ag coupled transducer for long-term high-temperature monitoring","authors":"Yiqing Gu, Yue Feng, Jiuhong Jia, Shan-Tung Tu","doi":"10.1016/j.apacoust.2025.110641","DOIUrl":"10.1016/j.apacoust.2025.110641","url":null,"abstract":"<div><div>Ultrasonic transducers play a critical role in structural health monitoring, particularly in high-temperature environments. In this work, nano-Ag coupled transducer is tested through insulation, cooling, and reheating stages to assess the acoustic performance and investigate underlying mechanisms. The results show that the stability of the resonance frequency indicated that its core acoustic properties are not significantly affected after operating at 350 °C for 60 h. Long-term high-temperature operation indicated a decline in SNR due to Kirkendall voids from non-equilibrium diffusion. Increases in the mechanical coupling coefficient and quality factor suggest a self-healing mechanism facilitated by grain boundary migration and atomic diffusion. Waveform distortions arose from thermal stress and mismatched thermal expansion coefficients in reheating.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110641"},"PeriodicalIF":3.4,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-09DOI: 10.1016/j.apacoust.2025.110640
Shuwei Ren , Wei Sun , Zijian Zhao , Yiyang Liu , Qian Wang , Fei Che , Haitao Wang , Ye Lei , Xiangyang Zeng
This study proposes a class of absorbers comprising a water-saturated porous meta-material and a metallic chamber for low-frequency underwater sound absorption. A conventional type, cylindrical water-saturated sintered fiber metal (SFM) composites with metallic chamber (CWSFMMC) is selected as a starting point and extensively studied through theoretical analyses, numerical simulations, and experimental measurements, showing outstanding absorption capabilities for underwater sound waves across a broad range of hydrostatic pressures to clarify the absorption mechanism of water-saturated porous material with a metallic chamber. Then, employing the criterion of an equivalent hydraulic radius, a geometric gradient corrugated-core-like channel is utilized to coil the single-layer water-saturated SFM, thus creating a water-saturated porous meta-material. This process establishes an innovative, optimized type of geometric gradient space-coiling porous underwater sound-absorbing metamaterial (GGSPM) through a combined theoretical approach with the impedance-transfer method, Biot’s theory, and the SO algorithm. In addition, numerical simulation results indicated that the GGSPM achieves robust underwater sound absorption within a sub-wavelength regime (∼/27 at 1480 Hz), mutually confirming the theoretical analysis. Furthermore, the performance under oblique incident waves (elevation angle and azimuth angle ) and the influence of material-related parameters (porosity and fiber diameter ) and gradient-specific acoustic impedance characteristics-related parameters (numbers of channels , , and ) are explored, showing significant potential for the development of next-generation high-performance underwater sound-absorption materials.
{"title":"Underwater low-frequency sound absorption of water-saturated porous meta-material with metallic chamber","authors":"Shuwei Ren , Wei Sun , Zijian Zhao , Yiyang Liu , Qian Wang , Fei Che , Haitao Wang , Ye Lei , Xiangyang Zeng","doi":"10.1016/j.apacoust.2025.110640","DOIUrl":"10.1016/j.apacoust.2025.110640","url":null,"abstract":"<div><div>This study proposes a class of absorbers comprising a water-saturated porous <em>meta</em>-material and a metallic chamber for low-frequency underwater sound absorption. A conventional type, cylindrical water-saturated sintered fiber metal (SFM) composites with metallic chamber (CWSFMMC) is selected as a starting point and extensively studied through theoretical analyses, numerical simulations, and experimental measurements, showing outstanding absorption capabilities for underwater sound waves across a broad range of hydrostatic pressures to clarify the absorption mechanism of water-saturated porous material with a metallic chamber. Then, employing the criterion of an equivalent hydraulic radius, a geometric gradient corrugated-core-like channel is utilized to coil the single-layer water-saturated SFM, thus creating a water-saturated porous <em>meta</em>-material. This process establishes an innovative, optimized type of geometric gradient space-coiling porous underwater sound-absorbing metamaterial (GGSPM) through a combined theoretical approach with the impedance-transfer method, Biot’s theory, and the SO algorithm. In addition, numerical simulation results indicated that the GGSPM achieves robust underwater sound absorption <span><math><mfenced><mrow><mrow><mi>α</mi><mo>≥</mo><mn>0.9</mn></mrow></mrow></mfenced></math></span> within a sub-wavelength regime (∼<span><math><mi>λ</mi></math></span>/27 at 1480 Hz), mutually confirming the theoretical analysis. Furthermore, the performance under oblique incident waves (elevation angle <span><math><msub><mi>γ</mi><mrow><mi>ea</mi></mrow></msub></math></span> and azimuth angle <span><math><msub><mi>γ</mi><mrow><mi>aa</mi></mrow></msub></math></span>) and the influence of material-related parameters (porosity <span><math><msub><mi>φ</mi><mi>s</mi></msub></math></span> and fiber diameter <span><math><msub><mi>d</mi><mi>f</mi></msub></math></span>) and gradient-specific acoustic impedance characteristics-related parameters (numbers of channels <span><math><msub><mi>n</mi><mn>2</mn></msub></math></span>, <span><math><msub><mi>n</mi><mn>3</mn></msub></math></span>, and <span><math><msub><mi>n</mi><mn>4</mn></msub></math></span>) are explored, showing significant potential for the development of next-generation high-performance underwater sound-absorption materials.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110640"},"PeriodicalIF":3.4,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-09DOI: 10.1016/j.apacoust.2025.110658
Siyuan Peng , Ailing Song , Yazhu Bai , Chaoyu Sun , Yanxun Xiang
In this paper, a reconfigurable frequency-selective acoustic coding metasurface is proposed for realizing multifunctional wavefront manipulation including sound focusing, beam splitting, and Airy beam. The acoustic coding unit is composed of three rotatable slitted round tubes of different sizes with extended necks. Independent manipulation of the reflected phase at different frequencies and the conversion between logical unit 0 and logical unit 1 can be achieved by changing the rotation angle of each slitted round tube. The feasibility of the proposed reconfigurable acoustic coding metasurface with multifunctionality is verified by theoretical analysis, numerical simulations, and experimental results. The proposed metasurface has the advantages of reconfigurability, multifunctionality, and multifrequency. Our work provides promising potential applications in multi-beam shaping, energy harvesting, and functional devices with special dispersion properties.
{"title":"Reconfigurable frequency-selective acoustic coding metasurface for multifunctional wavefront manipulation","authors":"Siyuan Peng , Ailing Song , Yazhu Bai , Chaoyu Sun , Yanxun Xiang","doi":"10.1016/j.apacoust.2025.110658","DOIUrl":"10.1016/j.apacoust.2025.110658","url":null,"abstract":"<div><div>In this paper, a reconfigurable frequency-selective acoustic coding metasurface is proposed for realizing multifunctional wavefront manipulation including sound focusing, beam splitting, and Airy beam. The acoustic coding unit is composed of three rotatable slitted round tubes of different sizes with extended necks. Independent manipulation of the reflected phase at different frequencies and the conversion between logical unit 0 and logical unit 1 can be achieved by changing the rotation angle of each slitted round tube. The feasibility of the proposed reconfigurable acoustic coding metasurface with multifunctionality is verified by theoretical analysis, numerical simulations, and experimental results. The proposed metasurface has the advantages of reconfigurability, multifunctionality, and multifrequency. Our work provides promising potential applications in multi-beam shaping, energy harvesting, and functional devices with special dispersion properties.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110658"},"PeriodicalIF":3.4,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Acoustic agglomeration is an effective pre-treatment technology for controlling particulate emissions in industrial applications. To enhance agglomeration efficiency, a constantly-changing-frequency method is applied to fine droplet aerosols. The improvement in agglomeration efficiency is demonstrated by comparing the agglomeration of fine droplet aerosols in sound with a fixed-frequency and a constantly-changing-frequency. The results show that the light transmittance and agglomeration efficiency at a residence time of 30 s increases by 8 % and 4 % when using sound with a constantly-decreasing-frequency (6 to 1 kHz) compared to sound with a fixed-frequency (6 kHz). Additionally, it is found that the agglomeration efficiency increases proportionally with acoustic power at low intensities until nonlinear acoustic effects become apparent. Moreover, a higher initial mass concentration means that the separation distance between droplets is shorter, which will significantly increase the probability of collision between droplets and the aggregation rate caused by acoustic waves.
{"title":"Enhancement of aerosol agglomeration efficiency using sound with a constantly-changing-frequency","authors":"Ziyue Chen, Guangxue Zhang, Dingkun Yuan, Yunchao Li, Hailin Gu, Jiangrong Xu","doi":"10.1016/j.apacoust.2025.110659","DOIUrl":"10.1016/j.apacoust.2025.110659","url":null,"abstract":"<div><div>Acoustic agglomeration is an effective pre-treatment technology for controlling particulate emissions in industrial applications. To enhance agglomeration efficiency, a constantly-changing-frequency method is applied to fine droplet aerosols. The improvement in agglomeration efficiency is demonstrated by comparing the agglomeration of fine droplet aerosols in sound with a fixed-frequency and a constantly-changing-frequency. The results show that the light transmittance and agglomeration efficiency at a residence time of 30 s increases by 8 % and 4 % when using sound with a constantly-decreasing-frequency (6 to 1 kHz) compared to sound with a fixed-frequency (6 kHz). Additionally, it is found that the agglomeration efficiency increases proportionally with acoustic power at low intensities until nonlinear acoustic effects become apparent. Moreover, a higher initial mass concentration means that the separation distance between droplets is shorter, which will significantly increase the probability of collision between droplets and the aggregation rate caused by acoustic waves.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110659"},"PeriodicalIF":3.4,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-07DOI: 10.1016/j.apacoust.2025.110650
Karina Einicke, John Kennedy
This paper explores the impact of wind patterns and aircraft operations on noise exposure at Dublin Airport, investigating monthly variations in noise levels and their implications for surrounding communities. While annual noise maps are mandated under END 2002/49/EC, they cannot capture the fluctuations in noise levels resulting from changes in flight numbers and weather conditions. The study provides a detailed analysis of weather patterns, wind influences, runway closures, and population exposure. Findings reveal significant fluctuations in noise exposure, with Westerly operations varying between throughout 2023, leading to area exposures ranging from to for noise levels exceeding . A grid mapping approach was utilized to illustrate these variations, highlighting the temporal changes in noise impact across different months. The comparison of monthly area exposures shows fluctuations of up to of a given area exposure within the contour. This underscores the need for both monthly and annual noise maps, which provide precise and actionable insights into seasonal noise fluctuations. These maps enable data-driven communication strategies, inform placement of noise monitoring networks and facilitate effective community engagement.
{"title":"Benefits of monthly noise mapping compared to annual assessments - an analysis of Dublin Airport","authors":"Karina Einicke, John Kennedy","doi":"10.1016/j.apacoust.2025.110650","DOIUrl":"10.1016/j.apacoust.2025.110650","url":null,"abstract":"<div><div>This paper explores the impact of wind patterns and aircraft operations on noise exposure at Dublin Airport, investigating monthly variations in noise levels and their implications for surrounding communities. While annual noise maps are mandated under END 2002/49/EC, they cannot capture the fluctuations in noise levels resulting from changes in flight numbers and weather conditions. The study provides a detailed analysis of weather patterns, wind influences, runway closures, and population exposure. Findings reveal significant fluctuations in noise exposure, with Westerly operations varying between <figure><img></figure> throughout 2023, leading to area exposures ranging from <figure><img></figure> to <figure><img></figure> for noise levels exceeding <figure><img></figure>. A grid mapping approach was utilized to illustrate these variations, highlighting the temporal changes in noise impact across different months. The comparison of monthly area exposures shows fluctuations of up to <figure><img></figure> of a given area exposure within the <figure><img></figure> contour. This underscores the need for both monthly and annual noise maps, which provide precise and actionable insights into seasonal noise fluctuations. These maps enable data-driven communication strategies, inform placement of noise monitoring networks and facilitate effective community engagement.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110650"},"PeriodicalIF":3.4,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-06DOI: 10.1016/j.apacoust.2025.110644
Jannis Kriz , Emanuele Porcinai , Steffen Lepa , Paula Klein , Johannes M. Arend , Stefan Weinzierl
Early reflections are an important factor for the acoustic conditions on stage. To better understand their effect on the perception of musical performers, an experimental study was conducted to investigate how the time and direction of arrival, the diffusivity and the strength of early reflections affect the perceived acoustic quality on stage. Architectural variations of a typical stage structure were created in computer models. Combinations of different stage widths, canopy heights, and surface scattering were modelled using geometric acoustics and Boundary Element Method (BEM) simulations. Listening experiments carried out with musicians of different instrumental groups playing with real-time auralisations of these virtual concert hall stages revealed that both the time and direction of arrival of early reflections have a significant effect on the stage acoustic conditions perceived by solo musicians. In a larger battery of stage acoustic parameters determined for each architectural variation, the ‘Top to Sides’ and ‘Top to Horizontal’ ratios (TS, TH) proved to be the best predictors of the acoustic quality of the stage configurations presented, although the interrelation within the musicians seems to be less uniform than for room acoustic parameters from the audience perspective.
{"title":"How early reflections affect the stage acoustic conditions for solo musicians","authors":"Jannis Kriz , Emanuele Porcinai , Steffen Lepa , Paula Klein , Johannes M. Arend , Stefan Weinzierl","doi":"10.1016/j.apacoust.2025.110644","DOIUrl":"10.1016/j.apacoust.2025.110644","url":null,"abstract":"<div><div>Early reflections are an important factor for the acoustic conditions on stage. To better understand their effect on the perception of musical performers, an experimental study was conducted to investigate how the time and direction of arrival, the diffusivity and the strength of early reflections affect the perceived acoustic quality on stage. Architectural variations of a typical stage structure were created in computer models. Combinations of different stage widths, canopy heights, and surface scattering were modelled using geometric acoustics and Boundary Element Method (BEM) simulations. Listening experiments carried out with musicians of different instrumental groups playing with real-time auralisations of these virtual concert hall stages revealed that both the time and direction of arrival of early reflections have a significant effect on the stage acoustic conditions perceived by solo musicians. In a larger battery of stage acoustic parameters determined for each architectural variation, the ‘Top to Sides’ and ‘Top to Horizontal’ ratios (TS, TH) proved to be the best predictors of the acoustic quality of the stage configurations presented, although the interrelation within the musicians seems to be less uniform than for room acoustic parameters from the audience perspective.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110644"},"PeriodicalIF":3.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-04DOI: 10.1016/j.apacoust.2025.110646
Chengying Zhao , Jiajun Wang , Fengxia He , Xiaotian Bai , Huaitao Shi , Jialin Li , Xianzhen Huang
The traditional fatigue life prediction method is to construct a mathematical model of the material fatigue degradation process to achieve material fatigue life prediction. However, this method heavily relies on the prior knowledge and expertise of researchers, which limits its generalization. In order to address this limitation, a multi-signal fusion deep attention residual convolutional neural network (MSF-DARCN) model is proposed in this paper for fatigue life prediction. The acoustic emission signal and temperature signal of metallic materials throughout its entire life cycle are integrated into the MSF-DARCN model to learn the fatigue degradation process of the material from multiple information sources and improve its fatigue life prediction accuracy. At the same time, the MSF-DARCN model leverages both channel attention and temporal attention mechanisms to learn important feature information in input data and enhance its sensitivity to the feature information of material degradation process. Additionally, the stacked residual convolutional structures of the MSF-DARCN model are employed to extract the spatial features of input data to enhance its feature extraction ability. Finally, based on the fatigue life experiment of 304 stainless steel specimens, the accuracy and effectiveness of the MSF-DARCN model are analyzed. The results indicate that the MSF-DARCN model exhibits high accuracy in predicting fatigue life.
{"title":"A fatigue life prediction method based on multi-signal fusion deep attention residual convolutional neural network","authors":"Chengying Zhao , Jiajun Wang , Fengxia He , Xiaotian Bai , Huaitao Shi , Jialin Li , Xianzhen Huang","doi":"10.1016/j.apacoust.2025.110646","DOIUrl":"10.1016/j.apacoust.2025.110646","url":null,"abstract":"<div><div>The traditional fatigue life prediction method is to construct a mathematical model of the material fatigue degradation process to achieve material fatigue life prediction. However, this method heavily relies on the prior knowledge and expertise of researchers, which limits its generalization. In order to address this limitation, a multi-signal fusion deep attention residual convolutional neural network (MSF-DARCN) model is proposed in this paper for fatigue life prediction. The acoustic emission signal and temperature signal of metallic materials throughout its entire life cycle are integrated into the MSF-DARCN model to learn the fatigue degradation process of the material from multiple information sources and improve its fatigue life prediction accuracy. At the same time, the MSF-DARCN model leverages both channel attention and temporal attention mechanisms to learn important feature information in input data and enhance its sensitivity to the feature information of material degradation process. Additionally, the stacked residual convolutional structures of the MSF-DARCN model are employed to extract the spatial features of input data to enhance its feature extraction ability. Finally, based on the fatigue life experiment of 304 stainless steel specimens, the accuracy and effectiveness of the MSF-DARCN model are analyzed. The results indicate that the MSF-DARCN model exhibits high accuracy in predicting fatigue life.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"235 ","pages":"Article 110646"},"PeriodicalIF":3.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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