Acoustics (Basel, Switzerland)最新文献_第8页

Compensation of Modeling Errors for the Aeroacoustic Inverse Problem with Tools from Deep Learning 利用深度学习工具补偿气动声学逆问题的建模误差

Acoustics (Basel, Switzerland) Pub Date : 2022-09-27 DOI: 10.3390/acoustics4040050

Hans-Georg Raumer, D. Ernst, C. Spehr

引用次数: 1

The Importance of Noise Attenuation Levels in Neonatal Incubators 新生儿保育箱噪声衰减水平的重要性

Acoustics (Basel, Switzerland) Pub Date : 2022-09-21 DOI: 10.3390/acoustics4040049

Francisco Fernández-Zacarías, Virginia Puyana-Romero, Ricardo Hernández-Molina

{"title":"The Importance of Noise Attenuation Levels in Neonatal Incubators","authors":"Francisco Fernández-Zacarías, Virginia Puyana-Romero, Ricardo Hernández-Molina","doi":"10.3390/acoustics4040049","DOIUrl":"https://doi.org/10.3390/acoustics4040049","url":null,"abstract":"Background: It is known that high noise levels can be harmful to preterm infants, causing physiological and psychological disorders. It is also known that premature babies spend a lot of time in an incubator. In this sense, many studies show that incubator noise levels can range from 45 to 70 dB. However, these differences in noise levels depend, fundamentally, on the wide range of methodology that can be used. This study aims to know the levels of noise from a fan in the incubator itself and how much it can isolate the noises coming from the outside. Methods: For this purpose, the noise levels of three incubators were measured within a sound-dampened booth for free-field audiometry. For the emission of acoustic energy, a pink noise generator was used; likewise, two microphones were placed, one inside the incubator cabin and the other outside, to determine the acoustic insulation levels of the tested incubators. Results: The incubators produced equivalent continuous sound pressure levels between 53.5 and 58 dB. Acoustic insulation analysis showed that levels varied from one incubator to another, between 5.2 and 10.4 dB. Conclusions: It is necessary to improve the acoustic insulation inside the incubator cabin and to reduce the noise levels of the motor fan. On the other hand, although the incubators are meeting the noise criteria set out in the IEC60601-2-19: 2009 standard of 60 dBA, under normal use conditions, they are still far from the limit recommended by the American Academy of Pediatrics (45 dBA).","PeriodicalId":72045,"journal":{"name":"Acoustics (Basel, Switzerland)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44568469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Acoustics of the Palace of Charles V as a Cultural Heritage Concert Hall 查尔斯五世宫殿作为文化遗产音乐厅的声学效果

Acoustics (Basel, Switzerland) Pub Date : 2022-09-15 DOI: 10.3390/acoustics4030048

Jose A. Almagro-Pastor, Rafael García-Quesada, Jerónimo Vida-Manzano, Francisco J. Martínez-Irureta, Á. Ramos-Ridao

引用次数: 3

Measuring the Acoustical Properties of the BBC Maida Vale Recording Studios for Virtual Reality 为虚拟现实测量BBC Maida Vale录音室的声学特性

Acoustics (Basel, Switzerland) Pub Date : 2022-09-14 DOI: 10.3390/acoustics4030047

G. Kearney, H. Daffern, Patrick Cairns, Anthony Hunt, Ben Lee, J. Cooper, Panos Tsagkarakis, Tomasz Rudzki, D. Johnston

引用次数: 3

Spatial Coherence Comparisons between the Acoustic Field and Its Frequency-Difference and Frequency-Sum Autoproducts in the Ocean 海洋声场及其频差和频和自积的空间相干性比较

Acoustics (Basel, Switzerland) Pub Date : 2022-09-07 DOI: 10.3390/acoustics4030046

Nick Joslyn, Alexander S Douglass, D. Dowling

{"title":"Spatial Coherence Comparisons between the Acoustic Field and Its Frequency-Difference and Frequency-Sum Autoproducts in the Ocean","authors":"Nick Joslyn, Alexander S Douglass, D. Dowling","doi":"10.3390/acoustics4030046","DOIUrl":"https://doi.org/10.3390/acoustics4030046","url":null,"abstract":"The frequency-difference and frequency-sum autoproducts, quadratic products of complex acoustic field amplitudes at two frequencies, may mimic genuine acoustic fields at the difference and sum frequencies of the constituent fields, respectively. Autoproducts have proven useful in extending the useable frequency range for acoustic remote sensing to frequencies outside a recorded field’s bandwidth. In array signal processing applications, the spatial coherence of the field often sets performance limits. This paper presents results for the spatial coherence of the genuine field, the frequency-difference autoproduct, and the frequency-sum autoproduct as determined from data collected during the Cascadia Open-Access Seismic Transects (COAST 2012) experiment. In this experiment, an airgun array providing a 10 to 200 Hz signal was repeatedly fired off the coast of Washington state, and the resulting acoustic fields were recorded by a nominal 8 km long, 636-element towed horizontal array. Based on hundreds of airgun firings from a primarily shore-parallel transect, both autoproducts were found to extend field coherence to frequencies outside the genuine field’s bandwidth and to produce longer coherence lengths than genuine fields, in most cases. When used for matched-field processing, the same data illustrate the benefits of the autoproducts’ extended coherence.","PeriodicalId":72045,"journal":{"name":"Acoustics (Basel, Switzerland)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47477865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Influence of Listeners’ Mood on Equalization-Based Listening Experience 听者情绪对均等化聆听体验的影响

Acoustics (Basel, Switzerland) Pub Date : 2022-09-01 DOI: 10.3390/acoustics4030045

Nefeli Dourou, V. Bruschi, S. Spinsante, S. Cecchi

引用次数: 0

Effects of Industrial Noise on Physiological Responses 工业噪声对生理反应的影响

Acoustics (Basel, Switzerland) Pub Date : 2022-08-31 DOI: 10.3390/acoustics4030044

M. Masullo, R. A. Toma, L. Maffei

{"title":"Effects of Industrial Noise on Physiological Responses","authors":"M. Masullo, R. A. Toma, L. Maffei","doi":"10.3390/acoustics4030044","DOIUrl":"https://doi.org/10.3390/acoustics4030044","url":null,"abstract":"Noise pollution is one of the most common workplace hazards. Noise exposure may induce auditory and extra-auditory physiological and psychological alterations that affect job performance, safety, comfort, and wellbeing. Recent research showed a connection between frequency components of noise and health outcomes, annoyance, physiological and psychological changes. This study investigated whether and how the activation of different typologies of industrial noises set at three different sound levels induced increases in electrodermal activity (EDA) and the heart rate variations differently. A laboratory listening test was performed for the study, in which 24 subjects were exposed to the activation of different industrial noises: Low Frequency, High Frequency, and Modulated noises at Low, Medium, and High sound levels, while some physiological responses were recorded. The noise stimuli were also evaluated based on a self-report questionnaire. Results show that the EDA variation increases as the Sound Level increases and is higher at HF. In contrast, no relevant changes have been found in RR variation. EDA changes are also related to the perception of the Valence dimension of the noise environment, while RR variations not. The findings of this study emphasized that the changes in EDA depend on the sound levels and frequency content of industrial noise typologies, as well as on the perception of their Valence.","PeriodicalId":72045,"journal":{"name":"Acoustics (Basel, Switzerland)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48834486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Numerical and Experimental Validation of Active Vibration Control Logic Performance of a Hybrid Noise Control-Based Brick 基于混合噪声控制的砖的主动振动控制逻辑性能的数值和实验验证

Acoustics (Basel, Switzerland) Pub Date : 2022-08-28 DOI: 10.3390/acoustics4030043

Ilaria Ronconi, Roberta Salierno, Ling Liu, A. Giglio, F. Ripamonti, Ingrid Paoletti

{"title":"Numerical and Experimental Validation of Active Vibration Control Logic Performance of a Hybrid Noise Control-Based Brick","authors":"Ilaria Ronconi, Roberta Salierno, Ling Liu, A. Giglio, F. Ripamonti, Ingrid Paoletti","doi":"10.3390/acoustics4030043","DOIUrl":"https://doi.org/10.3390/acoustics4030043","url":null,"abstract":"The limitations of active noise control (ANC) in coping with low frequencies and of passive noise control (PNC) in coping with middle-high frequencies are objects of research that present the potentialities of hybrid noise control (HBC). It aims at combining both of the behaviours by broadening the range of absorbed frequencies. Among the several application fields, the AEC (architecture, engineering, and construction) market can take advantage for those applications in which the noise conditions are caused by sound sources that tune in a broad frequencies range. In this frame, the paper describes the numerical and experimental validation of the active behaviour of an under-development project of a hybrid noise control-based acoustic bricks. The latter intends to embed the potentialities of active vibrational noise control (AVC) and passive destructive interference (PDI) in a unique design of an easy-to-mount, 3D-printed, customisable smart acoustic blocks. Active vibration control, the object of this paper, is provided by a 5-mm thick aluminium circular plate with an attached piezoelectric patch. The vibration of the latter, depending on a specific control law, defines the vibration of the plate itself achieving an abatement of the reflection coefficient. Through mathematical modelling and tests in an impedance tube, the results show that the control logic can reach an average abatement of the reflection coefficient of 82% in the frequency range 144–1007 Hz.","PeriodicalId":72045,"journal":{"name":"Acoustics (Basel, Switzerland)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42655389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effectiveness of MP3 Coding Depends on the Music Genre: Evaluation Using Semantic Differential Scales MP3编码的有效性取决于音乐类型:使用语义差异量表的评价

Acoustics (Basel, Switzerland) Pub Date : 2022-08-27 DOI: 10.3390/acoustics4030042

N. Papadakis, Ioanna Aroni, G. Stavroulakis

{"title":"Effectiveness of MP3 Coding Depends on the Music Genre: Evaluation Using Semantic Differential Scales","authors":"N. Papadakis, Ioanna Aroni, G. Stavroulakis","doi":"10.3390/acoustics4030042","DOIUrl":"https://doi.org/10.3390/acoustics4030042","url":null,"abstract":"MPEG-1 Layer 3 (MP3) is one of the most popular compression formats used for sound and especially for music. However, during the coding process, the MP3 algorithm negatively affects the spectral and dynamic characteristics of the audio file being compressed. The aim of this study is to evaluate the effect the MP3 coding format for different music genres and different bitrates via listening tests in which the original uncompressed files and the compressed files are compared. For this purpose, five different music genres were selected (rock, jazz, electronic, classical and solo instrument), and the files were compressed in three different bitrates (96 kbps, 160 kbps and 320 kbps). The semantic differential method was used, and ten bipolar scales were selected for the listening tests (e.g., better–worse, more distortion–less distortion, etc.). The following are the most important findings of this study: classical music was negatively affected the most among the genres due to the MP3 compression (lowest ratings in 8 out of 10 bipolar scales), the solo instrument was least affected among the genres (highest rating in 7 out of 10 bipolar scales), and for higher bit rates, the differences in ratings were small for all music genres. The findings of this study could be used to optimize and adapt the standard, depending on the music genre and the musical piece that needs to be encoded.","PeriodicalId":72045,"journal":{"name":"Acoustics (Basel, Switzerland)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43020181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Sound Scattering by Gothic Piers and Columns of the Cathédrale Notre-Dame de Paris 巴黎圣母院哥特式码头和柱子的声音散射

Acoustics (Basel, Switzerland) Pub Date : 2022-08-26 DOI: 10.3390/acoustics4030041

Antoine Weber, B. Katz

{"title":"Sound Scattering by Gothic Piers and Columns of the Cathédrale Notre-Dame de Paris","authors":"Antoine Weber, B. Katz","doi":"10.3390/acoustics4030041","DOIUrl":"https://doi.org/10.3390/acoustics4030041","url":null,"abstract":"Although the acoustics of Gothic cathedrals are of interest to researchers, the acoustic impact of their many columns is often neglected. The construction of the Cathédrale Notre-Dame de Paris spanned several centuries, including a wide variety of architectonic elements. This study investigates the sound scattering of a selection of seven designs that are relevant to this building as well as to the architectural style itself. These were measured on scale models (1:8.5 to 1:12), using a subtraction method, for receivers at about 3 m at full scale and a far-field source. They were also numerically simulated using a finite-difference time-domain method in two-dimensional space with an incident plane wave. The method integrates a finite volume framework to employ an unstructured mesh conforming to the complex geometries of interest. The two methods are in strong agreement for the considered configurations. Relative levels to the direct sound of backscattered reflections between −10 dB and 2 dB and between −15 dB and −6 dB in the transverse directions were estimated for the dimensions considered, relative to reported reflection audibility thresholds. Cross-sections with smaller scale geometrical elements on their perimeter can produce diffuse reflections similar to those of surface diffusers.","PeriodicalId":72045,"journal":{"name":"Acoustics (Basel, Switzerland)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44340740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3