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The repeatability and reproducibility of laboratory building acoustic measurements: Numerical study 实验室建筑声学测量的可重复性和再现性:数值研究
Proc. Meet. Acoust. Pub Date : 2017-08-04 DOI: 10.1121/2.0000530
A. Dijckmans, L. D. Geetere, B. Ingelaere
{"title":"The repeatability and reproducibility of laboratory building acoustic measurements: Numerical study","authors":"A. Dijckmans, L. D. Geetere, B. Ingelaere","doi":"10.1121/2.0000530","DOIUrl":"https://doi.org/10.1121/2.0000530","url":null,"abstract":"An important issue in building acoustics is the significant variability in laboratory test results that numerous round robin tests have indicated. The current wish to include the frequency bands 50-80 Hz in the procedures to determine single-number quantities has prompted new discussions. In this paper, wave based models are used to numerically investigate the fundamental repeatability and reproducibility. Regarding sound insulation measurements, both the pressure method (ISO 10140-2) and the intensity method (ISO 15186-1 and ISO 15186-3) are investigated in the frequency range 50-200 Hz. Flanking transmission measurements (ISO 10848) are also studied in a broad frequency range. The investigation includes the repeatability of the different measurement procedures, which depends on the influence of the source and receiver positions. The reproducibility in different test facilities is studied by looking at the influence of geometrical parameters like room and plate dimensions, aperture placement and aperture...","PeriodicalId":20469,"journal":{"name":"Proc. Meet. Acoust.","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84074832","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
Rippled spectrum discrimination in noise: Effects of compression 噪声中的波纹频谱识别:压缩效应
Proc. Meet. Acoust. Pub Date : 2017-08-01 DOI: 10.1121/2.0000527
O. Milekhina, D. Nechaev, V. Popov, A. Supin
{"title":"Rippled spectrum discrimination in noise: Effects of compression","authors":"O. Milekhina, D. Nechaev, V. Popov, A. Supin","doi":"10.1121/2.0000527","DOIUrl":"https://doi.org/10.1121/2.0000527","url":null,"abstract":"In psychophysical experiments, cochlear compression can be derived by the comparison of on- and low-frequency masking, assuming that in the signal representation, the responses to both the signal and on-frequency masker are equally compressed while the response to the low-frequency masker is not compressed. In the present study, this approach was used to assess the influence of compression on the discrimination of complex signal spectra. The signals were rippled noise, 0.38-oct wide, centered at 2 kHz, 40 to 90 dB SPL. The ripple-density discrimination limit was measured using the ripple-phase reversal test. The simultaneous maskers were 0.5-oct wide noise centered either at the signal frequency (on-frequency) or 0.75-oct below the signal (low-frequency). Increase in the masker level resulted in a decrease in the ripple-density resolution limit. The growth of the on-frequency masker was approximately 1:1. The growth of the low-frequency masker revealed no compression at signal levels from 40 to 50 dB, and...","PeriodicalId":20469,"journal":{"name":"Proc. Meet. Acoust.","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84735693","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
A methodology to design multi-axis test rigs for vibration and durability testing using frequency response functions 一种利用频响函数设计多轴振动和耐久性试验台的方法
Proc. Meet. Acoust. Pub Date : 2017-08-01 DOI: 10.1121/2.0000526
P. Şendur, Umut Ozcan, Berk Ozoguz
{"title":"A methodology to design multi-axis test rigs for vibration and durability testing using frequency response functions","authors":"P. Şendur, Umut Ozcan, Berk Ozoguz","doi":"10.1121/2.0000526","DOIUrl":"https://doi.org/10.1121/2.0000526","url":null,"abstract":"The multi-axis simulators are designed for experimental verification of the safe functioning of large components and subsystems under real world customer usage in vibration and durability testing. Transformation of the full vehicle conditions to mast rig testing with correct system dynamics and vibration characteristics and boundary conditions is a key challenge in the development of the experimental set-up. In this paper, a systematic methodology is formalized how to design the experimental set-up on MAST rig to replicate the vehicle dynamics and vibration characteristics in vehicle conditions. System modes and frequency response functions are chosen as key performance metrics to compare the dynamics of the system to be tested for both full vehicle and rig design. Criteria on the metrics are defined to make decision if the test rig design is sufficiently replicating the in-vehicle conditions. The methodology is illustrated on a side skirt attached to a heavy duty truck chassis that demonstrates the appli...","PeriodicalId":20469,"journal":{"name":"Proc. Meet. Acoust.","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84670676","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
History of sound source localization: 1850-1950 声源定位的历史:1850-1950
Proc. Meet. Acoust. Pub Date : 2017-08-01 DOI: 10.1121/2.0000529
W. Yost
{"title":"History of sound source localization: 1850-1950","authors":"W. Yost","doi":"10.1121/2.0000529","DOIUrl":"https://doi.org/10.1121/2.0000529","url":null,"abstract":"While scientists and philosophers have been interested in sound source localization since the time of the ancient Greeks, the modern study of this topic probably began in the late 19th century. Because sound has no spatial dimensions, there were many arguments at this time as to how humans localize a source based on the sound it produces. Lord Rayleigh conducted a “garden experiment” and concluded that a binaural ratio of sound level at each ear could account for his ability to identify the location of people who spoke in the garden. This type of experiment began the modern investigation of the acoustic cues used for sound source localization. In the first half of the 20th century, psychoacousticians such as Licklider, Jeffress, Mills, Newman, Rosenzweig, Stevens, von Hornbostel, Wallach, Wertheimer, and many others (documented by Boring in Sensation and Perception, 1942 and by Blauert in Spatial Hearing, 1997) added seminal papers leading to our current understanding of sound source localization. This pr...","PeriodicalId":20469,"journal":{"name":"Proc. Meet. Acoust.","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88936669","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: 4
Perceptual evaluation of violin radiation characteristics in a wave field synthesis system 波场合成系统中小提琴辐射特性的感性评价
Proc. Meet. Acoust. Pub Date : 2017-07-31 DOI: 10.1121/2.0000524
Leonie Böhlke, Tim Ziemer
{"title":"Perceptual evaluation of violin radiation characteristics in a wave field synthesis system","authors":"Leonie Böhlke, Tim Ziemer","doi":"10.1121/2.0000524","DOIUrl":"https://doi.org/10.1121/2.0000524","url":null,"abstract":"A method to synthesize the sound radiation characteristics of musical instruments in a wave field synthesis (WFS) system is proposed and tested. Radiation patterns of a violin are measured with a circular microphone array which consists of 128 pressure receivers. For each critical frequency band one exemplary radiation pattern is decomposed to circular harmonics of order 0 to 64. So the radiation characteristic of the violin is represented by 25 complex radiation patterns. On the reproduction side, these circular harmonics are approximated by 128 densely spaced monopoles by means of 128 broadband impulses. An anechoic violin recording is convolved with these impulses, yielding 128 filtered versions of the recording. These are then synthesized as 128 monopole sources in a WFS system and compared to a virtual monopole playing the unfiltered recording. The study participants perceive the tone color of the recreated virtual violin as being dependent on the listening position and report that the two source typ...","PeriodicalId":20469,"journal":{"name":"Proc. Meet. Acoust.","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72640589","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: 4
Psychophysical audiogram of a California sea lion listening for airborne tonal sounds in an acoustic chamber 加利福尼亚海狮在声学室中聆听空气中音调声音的心理物理听力图
Proc. Meet. Acoust. Pub Date : 2017-07-31 DOI: 10.1121/2.0000525
C. Reichmuth, Jillian M. Sills, Asila Ghoul
{"title":"Psychophysical audiogram of a California sea lion listening for airborne tonal sounds in an acoustic chamber","authors":"C. Reichmuth, Jillian M. Sills, Asila Ghoul","doi":"10.1121/2.0000525","DOIUrl":"https://doi.org/10.1121/2.0000525","url":null,"abstract":"Many species-typical audiograms for marine mammals are based on data from only one or a few individuals that are not always tested under ideal conditions. Here, we report auditory thresholds across the frequency range of hearing for a healthy, five-year-old female California sea lion identified as Ronan. Ronan was trained to enter a hemi-anechoic acoustic chamber to perform a go/no-go audiometric experiment. Auditory sensitivity was measured first by an adaptive staircase procedure and then by the method of constant stimuli. Minimum audible field measurements were obtained for 500 ms frequency-modulated tonal upsweeps with 10% bandwidth and 5% rise and fall times. Thresholds were measured at 13 frequencies: in one-octave frequency steps from 0.1 to 25.6 kHz, and additionally at 18.0, 22.0, 36.2, and 40.0 kHz. Sensitivity was greatest between 1 and 23 kHz, with best hearing of 0 dB re 20 µPa at 12.8 kHz. Hearing range, determined at the 60 dB re 20 µPa level, extended from approximately 0.2 kHz to 38 kHz. ...","PeriodicalId":20469,"journal":{"name":"Proc. Meet. Acoust.","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90194442","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
Incorporating measurement standards for sound power in an advanced acoustics laboratory course 在高级声学实验课程中结合声功率的测量标准
Proc. Meet. Acoust. Pub Date : 2017-07-31 DOI: 10.1121/2.0000523
K. Gee
{"title":"Incorporating measurement standards for sound power in an advanced acoustics laboratory course","authors":"K. Gee","doi":"10.1121/2.0000523","DOIUrl":"https://doi.org/10.1121/2.0000523","url":null,"abstract":"In an advanced acoustics laboratory course at Brigham Young University, students are introduced to ANSI measurement standards in the context of sound power. They are introduced to the anatomy of a typical acoustics standard and then plan and carry out sound power measurements of an electric leaf blower using both reverberation chamber and sound intensity methods. The students are required to write a technical memorandum describing a) the blower’s radiated sound power levels over an appropriate frequency range, as obtained with the two methods; b) setup documentation and deviations from the standards’ recommended practices; and c) how any deviations might have contributed to discrepancies between the sound power levels obtained with the two methods. In this paper, a description of the experience is given, along with overall impressions and plans for future improvements.","PeriodicalId":20469,"journal":{"name":"Proc. Meet. Acoust.","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83378269","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
Acoustics of naturally ventilated double transparent facades 自然通风双层透明立面的声学效果
Proc. Meet. Acoust. Pub Date : 2017-06-12 DOI: 10.1121/2.0000538
D. Urbán, N. Roozen, P. Zat'ko, M. Rychtáriková, Peter Tomasovic, C. Glorieux
{"title":"Acoustics of naturally ventilated double transparent facades","authors":"D. Urbán, N. Roozen, P. Zat'ko, M. Rychtáriková, Peter Tomasovic, C. Glorieux","doi":"10.1121/2.0000538","DOIUrl":"https://doi.org/10.1121/2.0000538","url":null,"abstract":"This publication presents results of research on naturally ventilated Double Transparent Facades (DTF). The influence of the structural design of DTFs on the airborne sound insulation was investigated. For this purpose, 9 DTFs were measured in situ and 9 Double Transparent Facade Elements (DTF) were measured in a laboratory environment. The influence of the cavity thickness, the parallelism of the constitution layers, the amount of absorbing surfaces in the cavity, and the effect of ventilation slots were investigated. Based on the performed measurements, a prediction model that allows a fast engineering calculation of the sound insulation of DTF’s was developed.","PeriodicalId":20469,"journal":{"name":"Proc. Meet. Acoust.","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82451362","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
Disability rights aspects of ambient noise for people with auditory disorders under the Americans with Disabilities Act 《美国残疾人法案》中听力障碍患者环境噪音的残障权利方面
Proc. Meet. Acoust. Pub Date : 2017-06-10 DOI: 10.1121/2.0000657
Daniel Fink
{"title":"Disability rights aspects of ambient noise for people with auditory disorders under the Americans with Disabilities Act","authors":"Daniel Fink","doi":"10.1121/2.0000657","DOIUrl":"https://doi.org/10.1121/2.0000657","url":null,"abstract":"The United States and European Union (EU) guarantee people with disabilities certain rights, with goals of full enjoyment, active inclusion, and equal participation in society. This approach is also found in the United Nations Convention on the Rights of Persons with Disabilities, adopted by EU. Noise is a disability rights issue for individuals with hearing loss. Many cannot understand speech in noisy places, with or without hearing aids. Ambient noise levels below 60 A-weighted decibels with a reverberation time under 0.50 seconds are needed to allow those with partial hearing loss to follow normal conversations. Noise worsens symptoms for those with tinnitus and hyperacusis. Noisy restaurants, stores, and other places deny full enjoyment and equal participation in public life to those with hearing loss, tinnitus, and hyperacusis. Legislative and regulatory action is needed to provide quiet environments, with established noise standards vigorously enforced. Technologies and environmental modifications t...","PeriodicalId":20469,"journal":{"name":"Proc. Meet. Acoust.","volume":"398 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78091411","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
Perception of acoustic comfort in large halls covered by transparent structural skins 由透明结构表皮覆盖的大型大厅的声学舒适度感知
Proc. Meet. Acoust. Pub Date : 2017-06-09 DOI: 10.1121/2.0000540
M. Rychtáriková, D. Urbán, Magdalena Kassakova, C. Maywald, C. Glorieux
{"title":"Perception of acoustic comfort in large halls covered by transparent structural skins","authors":"M. Rychtáriková, D. Urbán, Magdalena Kassakova, C. Maywald, C. Glorieux","doi":"10.1121/2.0000540","DOIUrl":"https://doi.org/10.1121/2.0000540","url":null,"abstract":"Large halls, such as shopping malls, atria or big entrance halls often suffer from various acoustic discomfort issues, which are not necessarily caused by extremely high noise levels. Due to the large size of halls and consequently the long trajectories that sound waves travel between the source, interior surfaces and the receiver, sound reflections arriving from surrounding surfaces are not as strong as they would be in smaller rooms. Reports in literature and comments by users of large halls concerning acoustic discomfort in large halls, refer mainly to continuous reverberation related noise. Therefore, quantification of the acoustic comfort by the reverberation time, which is related to the average absorption of interior surfaces and by the equivalent sound pressure level, which in a large space is dominated by direct sound, is not adequate to describe the global acoustic comfort or soundscape. Based on statistical noise analysis on auralized soudscapes, this article proposes a set of measurable monaur...","PeriodicalId":20469,"journal":{"name":"Proc. Meet. Acoust.","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82337020","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
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