• 한국의류산업학회지
• /
• 제14권3호
• /
• pp.486-491
• /
• 2012

This study examined the sound characteristics of Taekwondo uniform fabrics to investigate the relationship between the sound parameters and the mechanical properties of the fabric as well as to provide the conditions to maximize the frictional sound of the uniform. Frictional sounds of 6 fabrics for Taekwondo uniforms were generated by the Simulator for Frictional Sound of Fabrics. The frictional speeds were controlled at low(0.62 m/s), at mid(1.21 m/s) and at high(2.25 m/s) speed, respectively. The frictional sounds were recorded using a Data Recorder and Sound Quality System subsequently, the physical sound properties such as SPL(Sound Pressure Level) and Zwicker's psychoacoustic parameters were calculated. Mechanical properties of specimens were measured by KES-FB. The SPL, Loudness(Z) values increased while Sharpness(Z) value decreased. In the physical sound parameter, specimen E had the highest SPL value at low speed and specimen B at high speed. In case of Zwicker's psychoacoustic parameters, the commercially available Taekwondo uniform fabrics(E, F) showed higher values of Loudness(Z), Sharpness(Z), and Roughness(Z), that indicates they can produce louder, shaper and rougher sounds than other fabrics for Taekwondo uniforms. The decisive factors that affected frictional sounds for Taekwondo uniforms were W(weight) as well as EM(elongation at maximum load) at low speed and WC(compressional energy) at high speed.

• 한국자연치유학회지
• /
• 제11권2호
• /
• pp.143-151
• /
• 2022

배경: 싱잉볼은 그릇 모양의 타악기로 명상 및 치유 프로그램에 활용되고 있으나, 임상적 효과에 대한 기전이 명확하지 않다. 목적: 본 논문에서는 싱잉볼 소리의 독특한 음향학적인 특성을 개관하고, 싱잉볼의 효과를 유도하는 물리적인 기전에 대해 토의했다. 방법: 문헌을 고찰하여 연구하였다. 결과: 싱잉볼 소리는 인접한 다수의 피치의 소리가 포함되어 있어 맥놀이 현상이 발생한다. 싱잉볼 소리에서 느끼는 강하고 지속적인 소리의 울림은 맥놀이 현상의 결과이다. 싱잉볼 소리의 울림은 싱잉볼 악기 및 연주 방법에 좌우되며, 대체로 명상 상태에서 관찰되는 뇌파(세타파)와 유사한 리듬을 포함하며 명상 뇌파를 활성화하는 동조 현상을 유발한다. 싱잉볼 소리의 임상적 효과는 주로 싱잉볼 소리의 울림의 리듬과 뇌파의 동조 효과와 밀접하게 관련된 것으로 추정된다. 결론: 싱잉볼 소리의 임상적인 효과에 대한 기전을 명확히 이해하기 위해서는 싱잉볼 소리의 울림에 대한 심리 및 생리적인 반응에 대한 체계적인 연구가 필요하다.

• 말소리와 음성과학
• /
• 제10권4호
• /
• pp.127-134
• /
• 2018

This study aims to explain the difficulties children with articulation and phonological disorders have in producing alveolar fricative sounds. The study will perform a comparative analysis revealing how ordinary children produce alveolar fricative sounds through five different acoustic variables, and consequently identifying objective differences, compared to children with articulation and phonological disorders. Therefore, this study compared and analyzed the differences between 10 children with articulation and phonological disorders and 10 ordinary children according to a phonation type of alveolar fricative sounds (/s/ and /$s^*$), a type of vowel (/i/, /ε/, /u/, /o/, /ɯ/, /ʌ/, /ɑ/), and a structure of syllables (CV, VCV) through acoustic variables including a central moment, skewness, kurtosis, a center of gravity and variance. That is, children with articulation and phonological disorders, when compared to ordinary children, have difficulties with concentrating an agile and momentary friction with strength when articulating alveolar fricative sounds, which uses strong energy and accompany tension. Furthermore, the values of alveolar fricative sounds of children with articulation and phonological disorders appeared to spread evenly over the average range, which means that the range of overall the standard deviation values for children with functional phonological disorders is wider than that of ordinary children. For a future study, if the mispronounced sounds relating to omission, substitution, and addition can be compared and analyzed for various target groups, it could be used effectively to help children with functional phonological disorders.