Acta Acustica united with Acustica最新文献

Effects of a Synthetic Clarinet Bore Liner on Spectral Centroid and Fundamental Frequency Error 合成单簧管内径衬里对谱质心和基频误差的影响

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI: 10.3813/aaa.919397

Joshua Gardner

{"title":"Effects of a Synthetic Clarinet Bore Liner on Spectral Centroid and Fundamental Frequency Error","authors":"Joshua Gardner","doi":"10.3813/aaa.919397","DOIUrl":"https://doi.org/10.3813/aaa.919397","url":null,"abstract":"Throughout their relatively short history, various materials have been used to construct clarinets. While wood is the most common material used for modern professional clarinets, other materials have been and continue to be used, including synthetic materials. Despite the availability\u0000 and accessibility of these materials, professional musicians rarely use instruments made from synthetics, insisting that their wooden counterparts produce superior results. Numerous studies have found the energy radiated directly by rigid cylindrical vibrating tubes to be both insignificant\u0000 and have little to no effect on an internal vibrating air column. Using real instruments played by musicians, the present study compared a prototype clarinet upper joint with a synthetic bore liner produced by French instrument maker Henri Selmer Paris to two unlined, solid wood clarinets\u0000 of the same make and model by examining two acoustical parameters. Spectral centroid and fundamental frequency f0 pitch error were measured for 45 notes (written E3-C7), performed by five accomplished clarinetists unaware of which instrument they were playing. Consistent\u0000 with findings from other researchers, the particular instrument had no significant effect on spectral centroid. Meanwhile, although a significant effect of the instrument on f0 pitch error was found, pairwise comparisons suggest non-significant effects from the lined joint.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74642240","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

Annoyance and Partial Masking of Wind Turbine Noise from Ambient Sources 环境噪声源对风力发电机噪声的干扰和部分掩蔽

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI: 10.3813/aaa.919382

Anders Johansson, Karl Bohlin, J. Alvarsson

引用次数: 1

Transverse Spinal Cord Blood Vessels Visualization in a Pig Using Plane Wave Doppler Ultrasound Imaging 平面波多普勒超声成像显示猪脊髓横血管

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI: 10.3813/aaa.919405

D. Lemonnier, J. Mac-Thiong, P. Bélanger

引用次数: 0

A Numerical Study on Fluid Flow and Acoustic Characteristics of a Supersonic Impinging Jet Using Vorticity Confinement 利用涡量约束对超音速撞击射流流体流动和声学特性的数值研究

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI: 10.3813/aaa.919391

M. Sadri, K. Hejranfar, M. Ebrahimi

引用次数: 0

Detection Thresholds for Combined Infrasound and Audio-Frequency Stimuli 次声和音频联合刺激的检测阈值

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI: 10.3813/aaa.919394

Elisa Burke, J. Hensel, T. Fedtke, S. Uppenkamp, C. Koch

{"title":"Detection Thresholds for Combined Infrasound and Audio-Frequency Stimuli","authors":"Elisa Burke, J. Hensel, T. Fedtke, S. Uppenkamp, C. Koch","doi":"10.3813/aaa.919394","DOIUrl":"https://doi.org/10.3813/aaa.919394","url":null,"abstract":"This study investigated whether the presence of audio sound (20 Hz < frequency f < 20 kHz) influences the detection threshold for infrasound (f < 20 Hz), and, vice versa, whether the presence of infrasound influences the detection threshold for audio sound.\u0000 Monaural detection thresholds of thirteen otologically normal listeners were repeatedly determined for infrasound stimuli (sinusoids at 5 Hz and at 12 Hz) and for audio sound stimuli (sinusoids and bandlimited pink noise), separately and in presence of the respective other sound type. The\u0000 measurements were performed with an adaptive 1-up-2-down 3-alternative forced-choice (3-AFC) procedure. Threshold levels for infrasound stimuli were not affected by audio sound at +5 dB sensation level (SL), but they were significantly increased by the presence of some of the audio sound stimuli\u0000 presented at +50 dB SL. For example, thresholds for the detection of infrasound increased on average by around 5 dB when simultaneously presented with a pink-noise stimulus (frequency range: 250 Hz– 4000 Hz). On the other hand, the presence of infrasound with levels up to +10 dB SL did\u0000 not cause any significant change in the detection thresholds for audio sound. This could be an indication that infrasound might even be more annoying in a quiet environment.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77187540","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: 8

Rippled Depth Thresholds: Estimates Obtained by Discrimination From Rippled and Nonrippled Reference Signals 波纹深度阈值:由波纹和非波纹参考信号判别得到的估计值

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI: 10.3813/aaa.919396

A. Supin, O. Milekhina, D. Nechaev

{"title":"Rippled Depth Thresholds: Estimates Obtained by Discrimination From Rippled and Nonrippled Reference Signals","authors":"A. Supin, O. Milekhina, D. Nechaev","doi":"10.3813/aaa.919396","DOIUrl":"https://doi.org/10.3813/aaa.919396","url":null,"abstract":"The objective of the study was to better understand of contribution of excitation-pattern and temporal-processing mechanisms of frequency analysis to discrimination of complex-spectrum signals in various discrimination tasks. Using rippled-spectrum signals, the ripple depth thresholds\u0000 were measured as functions of ripple density under conditions of rippled or non-rippled reference signals. With rippled reference signals, the ripple depth thresholds were as low as 0.11 at low ripple densities (2–3 cycles/oct) and rose to 1.0 at a ripple density of 8.9 cycles/oct. For\u0000 non-rippled reference signals, ripple depth thresholds were nearly the same as for rippled reference signals at ripple densities of up to 7 cycles/oct; at ripple densities of 10 cycles/oct and higher, ripple depth thresholds rose slowly and reached 1.0 at a ripple density of 26 cycles/oct.\u0000 The results hypothetically suggest contributions of the excitation-pattern processing and temporal-processing mechanisms of frequency analysis to discrimination of rippled signals. The excitation-pattern mechanism featured low depth thresholds at low ripple densities but could not function\u0000 at ripple densities above 10 cycles/oct. The temporal-processing mechanism manifested at higher ripple densities and non-rippled reference stimuli.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88120408","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

Laboratory Methods with Imaginary and Simulated Contexts to Assess Noise Annoyance: A Comparison in Terms of Annoyance Model Testing 实验室方法与想象和模拟环境评估噪音烦恼:在烦恼模型测试方面的比较

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI: 10.3813/aaa.919386

C. Marquis-Favre

引用次数: 1

Estimation of the Perceived Time of Presence of Sources in Urban Acoustic Environments Using Deep Learning Techniques 利用深度学习技术估计城市声环境中声源存在的感知时间

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI: 10.3813/aaa.919384

Félix Gontier, C. Lavandier, P. Aumond, M. Lagrange, J. Petiot

{"title":"Estimation of the Perceived Time of Presence of Sources in Urban Acoustic Environments Using Deep Learning Techniques","authors":"Félix Gontier, C. Lavandier, P. Aumond, M. Lagrange, J. Petiot","doi":"10.3813/aaa.919384","DOIUrl":"https://doi.org/10.3813/aaa.919384","url":null,"abstract":"The impact of urban sound on human beings has often been studied from a negative point of view (noise pollution). In the two last decades, the interest of studying its positive impact has been revealed with the soundscape approach (resourcing spaces). The literature shows that the recognition\u0000 of sources plays a great role in the way humans are affected by sound environments. There is thus a need for characterizing urban acoustic environments not only with sound pressure measurements but also with source-specific attributes such as their perceived time of presence, dominance or\u0000 volume. This paper demonstrates, on a controlled dataset, that machine learning techniques based on state of the art neural architectures can predict the perceived time of presence of several sound sources at a sufficient accuracy. To validate this assertion, a corpus of simulated sound\u0000 scenes is first designed. Perceptual attributes corresponding to those stimuli are gathered through a listening experiment. From the contributions of the individual sound sources available for the simulated corpus, a physical indicator approximating the perceived time of presence of sources\u0000 is computed and used to train and evaluate a multi-label source detection model. This model predicts the presence of simultaneously active sources from fast third octave spectra, allowing the estimation of perceptual attributes such as pleasantness in urban sound environments at a sufficient\u0000 degree of precision.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79807948","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: 11

The Acoustics of Kabuki Theaters 歌舞伎剧场的音响效果

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI: 10.3813/aaa.919389

Clemens Büttner, M. Yabushita, Antonio Sánchez Parejo, Yu Morishita, S. Weinzierl

{"title":"The Acoustics of Kabuki Theaters","authors":"Clemens Büttner, M. Yabushita, Antonio Sánchez Parejo, Yu Morishita, S. Weinzierl","doi":"10.3813/aaa.919389","DOIUrl":"https://doi.org/10.3813/aaa.919389","url":null,"abstract":"The study presents a room acoustical investigation of a representative sample of eight Kabuki theaters as the most important public performance venues of pre-modern Japan. Room acoustical parameters according to ISO 3382 were measured for the unoccupied and simulated for the occupied\u0000 condition. In comparison with European proscenium stage theaters, they have lower room heights in the auditorium, with usually only one upper tier, and no high stage house for movable scenery. The lower volume per seat results in lower reverberation times, The wooden construction and the audience\u0000 seating arrangement on wooden straw mats on the floor instead of upholstered seats leads to a mostly flat frequency response up to 4 kHz, resulting in an excellent speech intelligibility, as documented by values for definition (D50) and the speech intelligibility index (STI). The\u0000 acoustical conditions support the dynamic acting space created by pathways extending the stage from the front through the audience to the rear of the auditorium. They allow great contrasts in the perceived acoustical proximity depending on the selected acting position, and support a high degree\u0000 of immersion of the audience into the dramatic action.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86873072","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 Optimization of a Bicylindrical Resonator Impedance: Differences and Common Features Between a Saxophone Resonator and a Bicylindrical Resonator 双圆柱谐振器阻抗的数值优化:萨克斯管谐振器与双圆柱谐振器之间的差异和共同特征

Acta Acustica united with Acustica Pub Date : 2019-11-01 DOI: 10.3813/aaa.919398

Tom Colinot, P. Guillemain, Jean-Baptiste Doc, C. Vergez, M. Jousserand

{"title":"Numerical Optimization of a Bicylindrical Resonator Impedance: Differences and Common Features Between a Saxophone Resonator and a Bicylindrical Resonator","authors":"Tom Colinot, P. Guillemain, Jean-Baptiste Doc, C. Vergez, M. Jousserand","doi":"10.3813/aaa.919398","DOIUrl":"https://doi.org/10.3813/aaa.919398","url":null,"abstract":"This paper explores the analogy between a saxophone resonator and a bicylindrical resonator, sometimes called transverse saxophone or cylindrical saxophone. The dimensions of a bicylindrical resonator are optimized numerically to approximate a saxophone impedance. The target is the\u0000 impedance measured on an usual saxophone. A classical gradient-based non-linear least-square fit function is used. Several cost functions corresponding to distances to the target impedance are assessed, according to their influence on the optimal geometry. Compromises appear between the frequency\u0000 regions depending on the cost function. It is shown that the chosen cost functions are differentiable and locally convex. The convexity region contains the initial geometrical dimensions obtained by crude approximation of the first resonance frequency of the target. One optimal geometry is\u0000 submitted to further analysis using descriptors of the impedance. Its deviations from the target saxophone are put into perspective with the discrepancies between the target saxophone and a saxophone from a different manufacture. Descriptors such as harmonicity or impedance peak ratio set\u0000 the bicylindrical resonator apart from saxophone resonators, despite a good agreement of the resonance frequencies. Therefore, a reed instrument with a bicylindrical resonator could be tuned to produce the same notes as a saxophone, but due to differences in the intrinsic characteristics of\u0000 the resonator, it should be considered not as a saxophone but as a distinct instrument.","PeriodicalId":35085,"journal":{"name":"Acta Acustica united with Acustica","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91164514","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