scholarly journals Correlation between Anatomical Grading and Acoustic–Elastic Properties of Resonant Spruce Wood Used for Musical Instruments

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1122
Author(s):  
Florin Dinulică ◽  
Mariana Domnica Stanciu ◽  
Adriana Savin
Keyword(s):  
Elastic Properties ◽  
Radial Direction ◽  
Sound Propagation ◽  
Wood Quality ◽  
Ring Width ◽  
Longitudinal Direction ◽  
Musical Instruments ◽  
Annual Ring Width ◽  
Speed Of Propagation

This paper deals with the acoustic and elastic properties of resonant wood, classified into four classes, according to the classification of wood quality by the manufacturers of musical instruments. Traditionally, the quality grades of resonant wood are determined on the basis of the visual inspections of the macroscopic characteristics of the wood (annual ring width, regularity, proportion of early and late wood, absence of defects, etc.). Therefore, in this research, we studied whether there are correlations between the acoustic and elastic properties and the anatomical characteristics of wood used for the construction of violins. The results regarding the identification of the anatomical properties of resonant spruce, the wood color, and the acoustic/elastic properties, determined by ultrasonic measurements, were statistically analyzed to highlight the connection between the determined properties. From the statistical analysis, it can be seen that the only variables with the power to separate the quality classes are (in descending order of importance) the speed of sound propagation in the radial direction, Poisson’s ratio in the longitudinal–radial direction, and the speed of propagation of sounds in the longitudinal direction.

Classification of Igbo musical instruments, Nigeria

1987 ◽  
Vol 6 (4) ◽  
pp. 19-41 ◽  
Author(s):  
Joy N. Lo-Bamijoko
Keyword(s):  
Musical Instruments

Cambial activity and ray cell abundance in Acer saccharum

1977 ◽  
Vol 55 (20) ◽  
pp. 2559-2564 ◽  
Author(s):  
R. A. Gregory
Keyword(s):  
Growth Rate ◽  
Acer Saccharum ◽  
Unit Area ◽  
Ring Width ◽  
Cambial Activity ◽  
Relative Volume ◽  
Annual Ring Width ◽  
Ray Cells ◽  
Fusiform Initials ◽  
Ray Cell

The ratio of ray and ray cell initials to fusiform initials of the vascular cambium relative to radial growth rate as reflected in the secondary xylem was studied in stems of Acer saccharum Marsh. Ray initials increased in size as they aged, slowly when growth rate was low, rapidly when it was high, but there was little fluctuation in the number of rays per unit of tangential area; as the cambium increased in circumference, the older, larger rays diverged and new small rays arose in intervening areas, thus maintaining a uniform unit area population independent of growth rate. However, since ray size increased rapidly when growth rate was high, the unit area population of ray cells rose abruptly with accelerating growth rate: the relative volume of xylem ray tissue rose from 8.6 to 12.7% of the total xylem volume when annual ring width increased from 1 to 7 mm. When fast growth was not maintained, the unit area population of ray cells declined slowly as the large rays diverged.

Relatii temporale între parametrii climatici si cresterile anuale ale speciilor forestiere (studiu de caz)

2019 ◽  
Author(s):  
Maria Nedealcov ◽  
◽  
Ala Donica ◽  
Ion Agapi ◽  
Nicolae Grigoras ◽  
...  
Keyword(s):  
Climatic Factors ◽  
Growth Parameters ◽  
Ring Width ◽  
Aridity Index ◽  
Quercus Petraea ◽  
Distribution Area ◽  
Natural Distribution ◽  
Annual Ring Width ◽  
Republic Of Moldova ◽  
The Republic

The forests on the natural distribution area from the silvosteppe zone, under the influence of climate change will experience major changes in their structure and functioning. The analysis of growth parameters for Fraxinus excelsior, Quercus petraea, Q. robur in three experimental areas from center of the Republic of Moldova indicates that the radial growth processes are influenced by the same complex of climatic factors, which differ being dendroclimatic response intensity. It has been shown that between the annual tree growth and forest aridity index - FAI, there are close correlations: the higher FAI values indicate the lower annual growth of the trees, and vice versa, low FAI values identify good development conditions of the stands (higher increases in the annual ring width).

scholarly journals Klasifikasi Alat Musik Tradisional Minangkabau

2019 ◽  
Vol 8 (1) ◽  
pp. 88
Author(s):  
Dian Novita Sari ◽  
Desriyeni Desriyeni
Keyword(s):  
Data Collection ◽  
Musical Instrument ◽  
Musical Instruments ◽  
Close Attention ◽  
Descriptive Research ◽  
Lack Of Information ◽  
Data Compilation ◽  
Main Class ◽  
Decimal Classification

Abstract The writing of this paper aims to (1) find out the classification of Minangkabau traditional musical instruments; (2) knowing the process of classifying Minangkabau traditional musical instruments; (3) knowing the obstacles and efforts to overcome obstacles in the process of classifying Minangkabau traditional musical instruments. Writing this paper using descriptive research methods. Data was collected based on observations and interviews from various sources. Based on the results of the study it can be concluded as follows, first classifying the traditional Minangkabau musical instrument the first step taken is data collection and data compilation. Then classify musical instruments based on the types of musical instruments which are divided into five, namely striking, blowing, striking, picking and pressing musical instruments, but there are only four types of musical instruments in Minangkabau, namely striking, blowing, striking and picking instruments. The types of musical instruments are classified according to the guidelines on DDC (dewey decimal classification). The two processes of classifying traditional musical instruments have several parts, as follows: (1) Dewey's classification; (2) Determine the Main Class; (3) Determine Divisions; (4) Determine the Section. The three obstacles in the process of classifying traditional Minangkabau musical instruments are as follows: (1) lack of information regarding musical instruments in the Minangkabau Region including the area of origin of the musical instruments; (2) the difficulty of grouping musical instruments based on the type of musical instrument, because many names of musical instruments are almost the same. Efforts to overcome obstacles in the process of classifying Minangkabau traditional musical instruments are as follows: (1) conducting the process of collecting all data derived from several literatures and institutions that store traditional Minangkabau musical instruments; (2) pay close attention to musical instruments to be grouped according to the type of music.Keywords: classification; traditional musical instruments; minangkabau

scholarly journals COEXISTENCE OF CLASSICAL MUSIC AND GUGAK IN KOREAN CULTURE

2020 ◽  
Vol 5 ◽  
pp. 67-99
Author(s):  
So Hyun Park
Keyword(s):  
Classical Music ◽  
Traditional Music ◽  
Musical Instruments ◽  
Colonial Period ◽  
New Music ◽  
Flowering Period ◽  
Korean Culture ◽  
Korean Traditional Music ◽  
Japanese Colonial

Classical music and Korean traditional music ‘Gugak’ in Korean culture try various ways such as creating new music and culture through mutual interchange and fusion for coexistence. The purpose of this study is to investigate the present status of Classical music in Korea that has not been 200 years old during the flowering period and the Japanese colonial period, and the classification of Korean traditional music and musical instruments, and to examine the preservation and succession of traditional Gugak, new Korean traditional music and fusion Korean traditional music. Finally, it is exemplified that Gugak and Classical music can converge and coexist in various collaborations based on the institutional help of the nation. In conclusion, Classical music and Korean traditional music try to create synergy between them in Korean culture by making various efforts such as new attempts and conservation.

scholarly journals DEPENDENCE OF PINUS SYLVESTRIS WOOD STRUCTURE AND PHYSICAL PROPERTIES ON GROWTH ENVIRONMENT CONDITIONS

2001 ◽  
Vol 1 ◽  
pp. 181
Author(s):  
Kaspars Šķēle ◽  
Dace Cīrule ◽  
Anda Alksne ◽  
Jurijs Hrols
Keyword(s):  
Physical Properties ◽  
Annual Ring ◽  
Forest Type ◽  
Ring Width ◽  
Wood Properties ◽  
Annual Ring Width ◽  
Pine Wood ◽  
Growth Environment ◽  
Earlywood Width ◽  
Parameter Values

The paper considers the variation o f annual ring parameters and physical properties of wood of the pine species prevailing in Latvia’s forests, depending on the forest type (bog-land, vacciniosa) and the growth region in Latvia (Vidzeme, Latgale). Wood samples were taken from the stem butt-end, the middle and 3 A o f the height, in its sapwood or core part. An average annual ring width, latewood and earlywood width in the year ring, the percentage of latewood in the annual ring, wood density in oven-dry state (0), tangential swelling (tg) and radial swelling (rad) o f wood, as well as volume swelling (v) and swelling anisotropy coefficient (k) o f wood were determined for the samples. A comparison of these data shows that, in the majority of cases, the indices for the wood of pines grown in vacciniose have higher values, which suggests the advantage of pine wood over the bog-land pine wood. In its turn, no unambiguous distinctions between the parameter values for pine wood o f Latgale and Vidzeme origin were found, although the pine wood of Vidzeme origin had a somewhat higher indices. It may be concluded that the greatest impact on the leading pine wood properties is caused by the forest types regarded herewith, and not the belonging o f the pine wood site to its different growth regions in Latvia.

Cost of reproduction in Douglas-fir

1992 ◽  
Vol 70 (7) ◽  
pp. 1429-1432 ◽  
Author(s):  
Yousry A. El-Kassaby ◽  
Hugh J. Barclay
Keyword(s):  
Pseudotsuga Menziesii ◽  
Annual Ring ◽  
Ring Width ◽  
Energy Allocation ◽  
Douglas Fir ◽  
Environmental Correlations ◽  
Annual Ring Width ◽  
Trade Off ◽  
Cone Production ◽  
Seed Cone

The balance between allocating energy resources to reproduction or growth has considerable theoretical interest. Conflicting ecological requirements and evolutionary pressures often necessitate a trade-off in energy allocation. We obtained measurements on seed-cone production and annual ring width of 365 Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees from 29 open-pollinated families for 8 years. Phenotypic, genetic, and environmental correlations were computed for seed-cone production and ring width for each year. Five of the eight environmental correlations were negative (range −0.077 to −0.305), reflecting the reality of the trade-off in physiological terms. Six of the eight genetic correlations were negative (range −0.199 to −0.776), indicating that a trade-off exists at the genetic level between energy allocation to reproduction and to somatic growth. These findings agree with the current theory of life-history evolution. Key words: Pseudotsuga menziesii, cone production, annual ring width, genetic correlation.

Is There a Need for a Fundamentally New Classification of Musical Instruments?

10.34690/156 ◽  
2021 ◽  
pp. 168-185
Author(s):  
Михаил Имханицкий
Keyword(s):  
Sound Source ◽  
Extraction Method ◽  
Symphony Orchestra ◽  
Large Family ◽  
Musical Instruments ◽  
New Classification ◽  
Pneumatic Valve ◽  
Snare Drum ◽  
Percussion Instruments

В статье предлагается новый принцип классификации музыкальных инструментов, основанный не на первичности источника звука при неизменной вторичности способа извлечения, а на полном равноправии этих компонентов. Для композитора и исполнителя всегда важнее способ извлечения звука, поскольку его источник - не более чем предпосылка тонообразования. Нелогичность общепринятой классификации становится очевидной уже при обращении к ударным инструментам: например, удар по мембране малого барабана делает его мембранофоном, а по обручу - идиофоном. Однако для музыкальной практики в первую очередь имеет значение способ извлечения звука на малом барабане и его принадлежность к ударным инструментам. В качестве примера также доказывается, что большое семейство гармоник надо определять не как «идиофоны с дутьем» и не как аэрофоны, согласно систематике выдающихся классиков инструментоведения Э. Хорнбостеля и К. Закса, а как пневматико-клапанные ламеллафоны. Автор статьи приходит к выводу, что музыкальные инструменты целесообразно классифицировать так, как это принято в академическом инструментарии: не на идиофоны, мембранофоны, хордофоны и аэрофоны, а, к примеру, на струнные смычковые, духовые и ударные - в симфоническом оркестре; целесообразно изменить принципы классификации и в других инструментальных составах. The article proposes a new principle of classification of musical instruments, based not on the primacy of the sound source with the constant secondary of the extraction method, but on the full equality of these components. For the composer and performer, the method of sound extraction is always more important, since its source is no more than a prerequisite for tone formation. The illogic of the generally accepted classification becomes obvious when referring to percussion instruments: for example, a blow on the membrane of a snare drum makes it a membranophone, and on a hoop-an idiophone. However, for musical practice, the method of extracting sound on a snare drum and its belonging to percussion instruments is primarily important. As an example, it is also proved that a large family of harmonics should be defined not as “idiophones with blowing” and not as aerophones, according to the systematics of the outstanding classics of instrumentation E. Hornbostel and C. Sachs, but as pneumatic-valve lamellaphones. The author of the article comes to the conclusion that it is advisable to classify musical instruments as it is customary in academic instruments: not into idiophones, membrano-phones, chordophones and aerophones, but, for example, into strings, brass and percussion-in a symphony orchestra; it is advisable to change the principles of classification in other instrumental sets also.

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