scholarly journals Microphone and Loudspeaker Array Signal Processing Steps towards a “Radiation Keyboard” for Authentic Samplers

2020 ◽  
Vol 10 (7) ◽  
pp. 2333 ◽  
Author(s):  
Tim Ziemer ◽  
Niko Plath
Keyword(s):  
Music Perception ◽  
Array Signal Processing ◽  
Music Performance ◽  
Sound Field ◽  
Field Analysis ◽  
Synthesis Methods ◽  
Time Frequency ◽  
Analysis And Synthesis ◽  
Potential Applications ◽  
Processing Steps

To date electric pianos and samplers tend to concentrate on authenticity in terms of temporal and spectral aspects of sound. However, they barely recreate the original sound radiation characteristics, which contribute to the perception of width and depth, vividness and voice separation, especially for instrumentalists, who are located near the instrument. To achieve this, a number of sound field measurement and synthesis techniques need to be applied and adequately combined. In this paper we present the theoretic foundation to combine so far isolated and fragmented sound field analysis and synthesis methods to realize a radiation keyboard, an electric harpsichord that approximates the sound of a real harpsichord precisely in time, frequency, and space domain. Potential applications for such a radiation keyboard are conservation of historic musical instruments, music performance, and psychoacoustic measurements for instrument and synthesizer building and for studies of music perception, cognition, and embodiment.

scholarly journals MESHRIR: A Dataset of Room Impulse Responses on Meshed Grid Points for Evaluating Sound Field Analysis and Synthesis Methods

2021 ◽  
Author(s):  
Shoichi Koyama ◽  
Tomoya Nishida ◽  
Keisuke Kimura ◽  
Takumi Abe ◽  
Natsuki Ueno ◽  
...  
Keyword(s):  
Sound Field ◽  
Field Analysis ◽  
Synthesis Methods ◽  
Impulse Responses ◽  
Analysis And Synthesis ◽  
Grid Points

scholarly journals Microphone and Loudspeaker Array Signal Processing to Build a "Radiation Keyboard" for Authentic Samplers

2020 ◽  
Author(s):  
Tim Ziemer ◽  
Niko Plath
Keyword(s):  
Array Signal Processing ◽  
Near Field ◽  
Minimum Energy ◽  
Music Performance ◽  
Sound Radiation ◽  
Sound Field ◽  
Intersection Point ◽  
Radiation Characteristics ◽  
Time Frequency ◽  
Wave Field Synthesis

To date electric pianos and samplers tend to concentrate on authenticity in terms of temporal and spectral aspects of sound. They barely recreate the original sound radiation characteristics, contribute to the perception of width and depth, vividness and voice separation, especially for instrumentalists, who are located in the near field. This paper describes an operational procedure to measure, store, and synthesize the complete sound of a harpsichord, including its spatial sound radiation characteristics. First, actuators excite the instrument at the intersection point of each string with the bridge with an exponential sine-sweep. Then, the radiated sound field is recorded in the near and the far field with microphone arrays. The pressure distribution in the near field is propagated back to the soundboard of the instrument, using Minimum Energy Method. The vibration of each single string is captured with lightweight contact microphones. The soundboard is then replaced by an array of 128 loudspeakers. The loudspeaker signal is a convolution of the back-propagated sweep recording with the string recording to perform a wave field synthesis. Above the spatial Nyquist frequency, the Radiation Method is applied to perform a sound field synthesis which is valid for the listening region of the instrumentalist. The result is an electric harpsichord, that approximates the sound of a real harpsichord precisely in time, frequency, and space domain. Applications for such a radiation keyboard are music performance, instrument and synthesizer building and interactive psychoacoustic research.

Modeling of reverberant room responses for two-dimensional spatial sound field analysis and synthesis

2017 ◽  
Vol 142 (4) ◽  
pp. 1953-1964 ◽  
Author(s):  
Mingsian R. Bai ◽  
Yi Li ◽  
Yi-Hao Chiang
Keyword(s):  
Sound Field ◽  
Field Analysis ◽  
Two Dimensional ◽  
Spatial Sound ◽  
Analysis And Synthesis

scholarly journals The Structure–Properties–Cytotoxicity Interplay: A Crucial Pathway to Determining Graphene Oxide Biocompatibility

2021 ◽  
Vol 22 (10) ◽  
pp. 5401
Author(s):  
Marta Dziewięcka ◽  
Mirosława Pawlyta ◽  
Łukasz Majchrzycki ◽  
Katarzyna Balin ◽  
Sylwia Barteczko ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Defense Mechanisms ◽  
Physicochemical Analysis ◽  
Experimental Models ◽  
Acheta Domesticus ◽  
Synthesis Process ◽  
Synthesis Methods ◽  
Toxicity Potential ◽  
Potential Applications

Interest in graphene oxide nature and potential applications (especially nanocarriers) has resulted in numerous studies, but the results do not lead to clear conclusions. In this paper, graphene oxide is obtained by multiple synthesis methods and generally characterized. The mechanism of GO interaction with the organism is hard to summarize due to its high chemical activity and variability during the synthesis process and in biological buffers’ environments. When assessing the biocompatibility of GO, it is necessary to take into account many factors derived from nanoparticles (structure, morphology, chemical composition) and the organism (species, defense mechanisms, adaptation). This research aims to determine and compare the in vivo toxicity potential of GO samples from various manufacturers. Each GO sample is analyzed in two concentrations and applied with food. The physiological reactions of an easy model Acheta domesticus (cell viability, apoptosis, oxidative defense, DNA damage) during ten-day lasting exposure were observed. This study emphasizes the variability of the GO nature and complements the biocompatibility aspect, especially in the context of various GO-based experimental models. Changes in the cell biomarkers are discussed in light of detailed physicochemical analysis.

Management Of Enterprise Development Strategies Formation: Analysis And Synthesis Methods

2021 ◽  
Vol 38 (4) ◽  
Author(s):  
Olga Kalaman ◽  
Tetiana Stupnytska ◽  
Yurii Melnyk ◽  
Karine Doicheva
Keyword(s):  
Swot Analysis ◽  
Synthesis Methods ◽  
Enterprise Strategy ◽  
Strategy Formation ◽  
Local Synthesis ◽  
Self Organized ◽  
Analysis And Synthesis ◽  
Enterprise Activity ◽  
Brand Product

The purpose of the presented research is to analyze, systematize and formulate an enterprise strategy based on the analysis and synthesis of opportunities and threats of the external environment in combination with its strengths and weaknesses. Unconventional structuring of SWOT-factors, as well as their local synthesis for determination of the driving and inhibiting forces of the enterprise, has been offered. Ways to identify trends and patterns of external and internal environment based on a generalized model of SWOT-factors have been identified. Decisive in formulating a strategy (self-organized in nature) is a harmonization model of the goals system. General theoretical methods (analogy, abstraction, analysis and synthesis, idealization, imaginary modeling) and practical methods of research (observation, comparison, matching, analysis of statistical and other indicators) were used to solve the problems of the research. Methods such as empirical, statistical, graphical, etc. were used to process and summarize information.Thus, the approach study to the enterprise strategy formation based on the analysis and synthesis of the environment opportunities and threats in combination with its strengths and weaknesses allows to state that the development of a common structured list of major areas of enterprise activity is carried out taking into account the synthesis of all SWOT-analysis of the brand product, competitors and market segments, which allows the company to achieve a certain specific purpose of its activities.

scholarly journals PROBLEMS OF THE DEVELOPMENT OF PEASANT ECONOMIES AND FARMS IN THE MINDS OF THE LAND REFORM IN UKRAINE

2019 ◽  
pp. 113-125
Author(s):  
Olena Pimenova
Keyword(s):  
Land Reform ◽  
Agricultural Land ◽  
Graphical Method ◽  
Historical Analysis ◽  
State Regulation ◽  
Synthesis Methods ◽  
Expert Evaluation ◽  
Farm Model ◽  
Analysis And Synthesis ◽  
The Impact

The historical analysis of the development of national forms of economy has been carried out. It has been determined that the most economically advantageous for society, vital, rational, socio-ecological-economic forms of economy are peasant economies and farms. The methodological basis of the study as to the identification of rational and effective forms of economy are general scientific methods, including methods of historical analysis, generalization, comparison, analysis and synthesis, methods of expert evaluation, graphical method. In the course of the research, the methods of historical analysis, generalization, analysis and synthesis were used in carrying out a retrospective analysis, in particular the research of scientific opinion on the effectiveness of such forms of economy as peasants and farms and the impact of land reform on their development; the method of expert evaluation in the survey of peasants and representatives from the administration of Radomyshl region of Zhytomyr oblast to determine their opinion – how the land reform will affect on the development of peasants and farms; graphical method for constructing tables and graphs. The study of the world experience in agriculture confirmed that the development of the farm model as a priority model of economy in agriculture is possible only with the active support of a state, as an institution that regulates land use through administrative and economic measures and provides legislation through limitation of purchase of land and the potential withdrawal of this land from agricultural circulation, and also involves the implementation of targeted programs through the financing of individual activity. An important function of state regulation is the conservation of the agricultural land fund. In developed countries, there are some restrictions on the land market to prevent latifundia. It is substantiated that in the course of land reform, the agrarian policy should be focused on preventing the creation of latifundia with large land tenure, as well as on the support, protection and development of peasant economies and farms as viable forms.

MAGNETIC NANOCHAINS: A REVIEW

NANO ◽  
2011 ◽  
Vol 06 (01) ◽  
pp. 1-17 ◽  
Author(s):  
HUI WANG ◽  
YIFEI YU ◽  
YUBIN SUN ◽  
QIANWANG CHEN
Keyword(s):  
Magnetic Field ◽  
Self Assembly ◽  
Magnetic Interactions ◽  
Synthesis Methods ◽  
Zero Field ◽  
Magnetic Recording Media ◽  
1D Chain ◽  
Potential Applications ◽  
Micromechanical Sensors ◽  
Nanoparticle Chains

One-dimensional (1D) chain-like structures are of special significance because of their interparticle magnetic interactions and potential applications in various fields, such as micromechanical sensors. This paper attempts to review the field of research into magnetic chains including monatomic chains and nanoparticle chains. The synthesis methods used mostly belong to one of the following categories: magnetosome chains in magnetotactic bacteria, zero-field self-assembly, magnetic field induced (MFI) assembly, template-directed synthesis, and gas phase synthesis. The potential applications of nanoparticle chains, mainly in the field of magnetic recording media, sensor, biomedicine and magnetic-field tunable photonic crystal are discussed.

Sound field analysis and simulation for fluid machines

2009 ◽  
Vol 40 (1) ◽  
pp. 15-22 ◽  
Author(s):  
Shao-Yi Hsia ◽  
Shih-Ming Chiu ◽  
Jyin-Wen Cheng
Keyword(s):  
Sound Field ◽  
Field Analysis

scholarly journals Sound Field Analysis Based on Analytical Beamforming

2006 ◽  
Vol 2007 (1) ◽  
Author(s):  
M. Guillaume ◽  
Y. Grenier
Keyword(s):  
Sound Field ◽  
Field Analysis
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