• Journal of the Korean Wood Science and Technology
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• v.26 no.4
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• pp.26-33
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• 1998

Acoustical properties of chestnut and paulownia woods have been determined in four film thicknesses of oriental lacquering and cashew varnishing on double surfaces of soundboard to elucidate effects of finishing. Accelerometer was attached to the specimen at one third position from one end, and specimen was hit by the impact hammer at one third position from opposite end. Data were processed by vibration analyzer. The ratio of axial-to-transverse sound velocity of untreated specimens of chestnut and paulownia were 3.25 and 5.34, respectively. Natural frequency, specific Young's modulus, acoustical coefficient, sound velocity, damping of sound radiation(DSR) and acoustical converting efficiency(ACE) decreased by oriental lacquering and cashew varnishing for both species. Damping of internal friction of chestnut decreased by oriental lacquering and cashew varnishing, but that of paulownia increased. Natural frequency. specific Young's modulus, acoustical coefficient, sound velocity, and DSR decreased with increased film thickness of both finishing materials. However, damping of internal friction and ACE showed irregular tendency with increased film thickness. Acoustical properties of cashew varnished chestnut specimen were better than those of oriental lacquered specimen. Acoustical properties of oriental lacquered paulownia specimen were better than those of cashew varnished specimen.

• Journal of the Korean Wood Science and Technology
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• v.24 no.3
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• pp.5-11
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• 1996

It has been reported that acetylation reduces the sorption of wood, thereby increasing the stability of the acoustic and dimensional properties of wood under conditions of changing humidity. Bamboos used for making a Korean traditional flute were acetylated and their dimensional properties were evaluated by measuring Weight Percent Gain and thickness swelling in water. Before acetylation bamboos were vacuum-dried to 3~6% at $50{\sim}80^{\circ}C$ without degradation. The optimum reaction temperature and time for bamboo acetylation were found to be $120^{\circ}C$ and 8 hours, respectively.

• Journal of Digital Contents Society
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• v.10 no.4
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• pp.561-568
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• 2009

In 21C, computer is having a powerful influence on every fields. As music field is no exception, the computer music is regarded as a next generation music. Especially the focus of 21st century's music is now moving from MIDI of 20th century to the Realtime interactive music in which computer is used as a practical instrument. Most european countries and America are doing a lot of research and performing these music. But in Korea, known as a fairly strong IT country, there is no enough perception of the importance of this new outcome of the new media era, and introduction of this music is slow as well. In this paper, we suggest the possibility of using the new way of composition by realtime interactive music in Korea. This can be a strong merit for Korean composers who want to use Korean instruments which were limited to be used as international instruments because of their restricted registers, techniques and so on.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.32 no.1
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• pp.1-9
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• 2014

The purpose of this study was to identify the landscape characteristics of Youngnam-Lu by performing text analysis of related Korean poems over 600 years. A total of 354 poems were quantitatively analyzed for keywords and terms in particular categories such as nature. As a subsidiary analysis, topographic map was examined using CAD along with analysis of antique maps. Of the 354 poems reviewed, keywords frequently used are: 'Scenic sites'- 56 times, 'Long river' (長江) and 'Long stretched forest'(長林) - 39 times each, 'Superb scenery'- 31 times, 'Large field scenery'- 19 times, and 'Thousand-layered mountain view' - 14 times. In total, these keywords occurred 159 times in 44.9 % of these poems.1) The words used frequently in these poems, especially for those fall under category of nature, can be scored into different subcategories such as natural phenomena and geographical features. Occurrences of terms in each subcategory were main criteria for the analysis and the following is a list of subcategories with frequency in descending order: Natural phenomena (44%), geographical features (33%), plants (14%), and animals (9%). Among natural phenomena, phenomena related to sky were most frequent, 41 times, which might be due to superb sky view from Youngnam-Lu. Also geographical features of Youngnam-Lu were reflected in these poems, and the most prominent features were 'flow of the river' and 'Sand island' located in the Milyang River. These poems contained fairly large number of terms related to musical instruments (8%) which suggest that Young-Nam-Lu as a place where various musical instruments performances were held.

• The KIPS Transactions:PartA
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• v.18A no.1
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• pp.1-10
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• 2011

Physical modeling has been widely used for sound synthesis since it synthesizes high quality sound which is similar to real-sound for musical instruments. However, physical modeling requires a lot of parameters to synthesize a large number of sounds simultaneously for the musical instrument, preventing its real-time processing. To solve this problem, this paper proposes a single instruction, multiple data (SIMD) based multi-core processor that supports real-time processing of sound synthesis of gayageum which is a representative Korean traditional musical instrument. The proposed SIMD-base multi-core processor consists of 12 processing elements (PE) to control 12 strings of gayageum in which each PE supports modeling of the corresponding string. The proposed SIMD-based multi-core processor can generate synthesized sounds of 12 strings simultaneously after receiving excitation signals and parameters of each string as an input. Experimental results using a sampling reate 44.1 kHz and 16 bits quantization show that synthesis sound using the proposed multi-core processor was very similar to the original sound. In addition, the proposed multi-core processor outperforms commercial processors(TI's TMS320C6416, ARM926EJ-S, ARM1020E) in terms of execution time ($5.6{\sim}11.4{\times}$ better) and energy efficiency (about $553{\sim}1,424{\times}$ better).

• Korean Journal of Heritage: History & Science
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• v.42 no.4
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• pp.96-111
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• 2009

This essay is a study aimed at rationality and utility of two terms, 'Nongak' and 'Pungmul'. I examined how the terms have been today, by diachrony based on review of historical material. I tried to secure the historical context and basis about my argument, quoting many historical material from Korea Dynasty period, Joseon Dynasty period and the colonial period of the imperial Japan during 1910-45 to today. I examined many objective arguments about the 'Nongak', and pointed out the mistake of the objective argument. And I examined the means and rationality of the terms, 'Nongak', 'Pungmul', 'Pungmulgut', 'Pungmulnory'. The 'Pungmul' has been used as the means of instrument for a long time from Joseon Dynasty period. It is only rational using as the means of instrument but as the means of Performance of Nongak considering the historical legitimacy. The 'Pungmul' is Sino-Korean word, not korean native letter. The Pungmulgut means the 'ritual by Pungmul', so it can be recognized the rationality, but have a weak point that it is a neologism being made by some intellectuals in 1980s. In addition to, it is not used im performing field. 'Pungmulnory' has a limit to call the Nongak as a synthetic art. 'Nongak'means a synthetic art that farmers who were absolute majority in agrarian society of Korea have made and developed. So I conclude that 'Nongak'is the best rational term.

• Journal of Korea Entertainment Industry Association
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• v.14 no.6
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• pp.151-160
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• 2020

In the past, musicians followed strict patterns written by composers when playing classical music. However, since the development of postmodernism, which puts an emphasis on unique individualities and various ways of thinking, following the strict patterns of classical music unquestioningly became less significant. Classical music was thought to be difficult to follow and enjoy for most people. Thus, musicians have found ways to keep the dignity of classical music but added familiarity in order to popularize arias in operas. They created classical crossover music and this type of music enabled people to enjoy easy access to classical music. However, not many studies focus on arrangement methods of changing classical music into crossover music. The goal of this study is to research on arrangement methods of crossover music based on the findings from precedent researches on operas. This study focused on analyzing musical structure including chords, rhythms and compositions of musical instruments. According to the analysis, original classical songs and popera, which is a type of crossover music, share similarities in terms of rhythms and chords. However, there are differences when it comes to compositions of musical instruments. In case of a jazz version, it uses AfroCuban rhythm as well as Bolero rhythm which is a part of ballad and jazz acoustic instruments are mainly used. Also, in order to reduce the feeling of classical music and to differentiate the jazz version from the original version, a lot of tension is used in voicing. This study can be helpful for any researches related to arrangements of classical crossover music.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.38 no.3
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• pp.337-344
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• 2014

An optimal shape design algorithm is suggested to systematically design a traditional Korean musical instrument, the Pyeongyeong. The Pyeongyeong consists of 16 different chime stones called Gyeongpyeons. The first natural vibration frequency of each Gyeongpyeon must be adjusted to its target frequency, which is determined by the traditional sound tuning method. The second and third natural frequencies must be proportional to the first natural frequency with a specific ratio (1:1.498:2.378). The key idea in our suggested design algorithm is to use the sensitivity of natural frequencies to the variation in the length of each side of a Gyeongpyeon. The dimensions of five different Gyeongpyeons are determined by following the suggested algorithm. Changes in natural frequencies with respect to local thickness variation are closely investigated to compensate for errors that may occur during manufacturing.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.9
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• pp.575-583
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• 2020

This research approach is different from the existing definition of Tropical House. It was derived from an electronic music genre (deep house, chill out, dance hall). However, this study explains that Tropical House contains elements of other art forms as well as electronic music. These are the elements of Ireland's traditional music (Celtic music). This study explains why the fusion of Tropical House and Celtic music was easy. And it shows that elements of Celtic music are included in Tropical House through eight popular songs. It can be confirmed that the melody, harmony, rhythm, singing method, instrumentation, and structure of Tropical House are intertwined with the elements of Celtic music. The key point of this research is to suggest that Celtic musical elements are found in the Tropical House genre. In addition, creators need to pay attention to various types of music, including traditional music from around the world. It is suggested that creators need to think about how to combine today's music with various other genres to create original music.

• Journal of Digital Contents Society
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• v.5 no.3
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• pp.213-218
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• 2004

The objective of this paper is to verify the usefulness and validity of ICT-based elementary education for musical composition using multimedia technology. Cearing with the characteristic of musical education, multimedia technology, which has made dazzling progress thanks to the rapid development of computer for the last several year, is expected to be a new alternative to overcome various problems of musical education and enhance students` musical function and knowledge. In particular, if ICT-based musical education is introduced in teaching musical composition, in which many elementary school techers feel difficulties, significant education effects will be produced. ICT-based musical education method in the paper identified imitation and problems in traditional theory-based learning and musical composition class using musical instruments and, as a part of resolving the limitations and problems, instructed elementary students in how to use a computer program and applied the program to musical composition class. As a result, the method maximized learning effect and improved stusents` ability to create melodies in a short term compared to traditional teaching methods.