arXiv: Classical Physics最新文献_第8页

Active acoustic metamaterials reconfigurable in real-time 实时可重构的有源声学超材料

arXiv: Classical Physics Pub Date : 2015-05-03 DOI: 10.1103/PHYSREVB.91.220303

B. Popa, Durvesh Shinde, Adam Konneker, S. Cummer

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引用次数: 92

Active Invisibility Cloaks in One Dimension 一维主动隐形衣

arXiv: Classical Physics Pub Date : 2015-04-05 DOI: 10.1103/PHYSREVA.91.063812

A. Mostafazadeh

引用次数: 13

Decomposition of Electromagnetic Q and P Media 电磁Q和P介质的分解

arXiv: Classical Physics Pub Date : 2015-03-15 DOI: 10.2528/PIERB15030901

I. Lindell, A. Favaro

引用次数: 4

Effect of Changing the Vocal Tract Shape on the Sound Production of the Recorder: An Experimental and Theoretical Study 改变声道形状对录音机发声影响的实验与理论研究

arXiv: Classical Physics Pub Date : 2015-03-01 DOI: 10.3813/AAA.918829

R. Auvray, Augustin Ernoult, S. Terrien, B. Fabre, C. Vergez

{"title":"Effect of Changing the Vocal Tract Shape on the Sound Production of the Recorder: An Experimental and Theoretical Study","authors":"R. Auvray, Augustin Ernoult, S. Terrien, B. Fabre, C. Vergez","doi":"10.3813/AAA.918829","DOIUrl":"https://doi.org/10.3813/AAA.918829","url":null,"abstract":"Changing the vocal tract shape is one of the techniques which can be used by the players of wind instruments to modify the quality of the sound. It has been intensely studied in the case of reed instruments but has received only little attention in the case of air-jet instruments. This paper presents a first study focused on changes in the vocal tract shape in recorder playing techniques. Measurements carried out with recorder players allow to identify techniques involving changes of the mouth shape as well as consequences on the sound. A second experiment performed in laboratory mimics the coupling with the vocal tract on an artificial mouth. The phase of the transfer function between the instrument and the mouth of the player is identified to be the relevant parameter of the coupling. It is shown to have consequences on the spectral content in terms of energy distribution among the even and odd harmonics, as well as on the stability of the first two oscillating regimes. The results gathered from the two experiments allow to develop a simplified model of sound production including the effect of changing the vocal tract shape. It is based on the modification of the jet instabilities due to the pulsating emerging jet. Two kinds of instabilities, symmetric and anti-symmetric, with respect to the stream axis, are controlled by the coupling with the vocal tract and the acoustic oscillation within the pipe, respectively. The symmetry properties of the flow are mapped on the temporal formulation of the source term, predicting a change in the even / odd harmonics energy distribution. The predictions are in qualitative agreement with the experimental observations.","PeriodicalId":331413,"journal":{"name":"arXiv: Classical Physics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121747676","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: 5

Direct calculation of length contraction and clock retardation 直接计算长度收缩和时钟延迟

arXiv: Classical Physics Pub Date : 2015-01-22 DOI: 10.2298/SAJ1590049R

D. Redžić

引用次数: 2

Broadband acoustic trapping of a particle by a soft plate with a periodic deep grating 带周期性深光栅的软板对粒子的宽带声捕获

arXiv: Classical Physics Pub Date : 2015-01-03 DOI: 10.1063/1.4919218

Hailong He, Shiliang Ouyang, Zhaojian He, K. Deng, He-ping Zhao

引用次数: 6

Stringy Maxwell charge and the magnetic dipole moment 弦麦克斯韦电荷和磁偶极矩

arXiv: Classical Physics Pub Date : 2014-12-31 DOI: 10.1142/S0218271816400010

R. Hammond