• 제목/요약/키워드: 진동과 소리

검색결과 162건 처리시간 0.024초

능동 신호 처리 및 시간 주파수 해석을 이용한 기어의 이상 진단 (Fault Diagnosis in Gear Using Adaptive Signal Processing and Time-Frequency Analysis)

  • 이상권
    • 소음진동
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    • 제8권4호
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    • pp.749-756
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    • 1998
  • 기어에서 충격성 진동 및 소음은 치차의 이상과 연관이 있다. 따라서 충격 진동 및 소리는 기어의 이상 진단에 사용되어 질 수 있다. 또한 이들 충격파를 조기에 정확하게 탐지하여 기어의 이상을 진단하면 완전 파손을 방지할 수 있다. 그러나 주변 소음 및 노이즈 신호 때문에 객관적이 충격파의 탐지가 어렵기 때문에, 본 논문은 이러한 숨겨진 충격 신호를 능동 신호 처리 기법을 이용하여 조기에 찾아내고 이것을 시간-주파수 영역에서 해석하였다.

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이동전화 종류에 따른 벨소리의 음질 평가 (Sound Quality Evaluation of the Ring Tones according to Mobile Phone Kind)

  • 정동현;박상길;강귀현;이정윤;오재응
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2007년도 추계학술대회논문집
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    • pp.1288-1292
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    • 2007
  • Mobile phone is necessary articles by increasing mobile communication now. People usually use the Mobile phone in any time and place. Ring tone of Mobile phone effect owner or other person. The sound level of Mobile phone ring tone could be considered as noise if it is too loud a specific situation. Manufacturing company improve ring tone of mobile phone better in consumer's perception. In this study, we record ring tone of mobile phone and estimated the complexity and nonlinear characteristics of the relation between subjective evaluation and sound metrics. Linear regression models were obtained for the subjective evaluation and sound quality metrics. Semantic Differential Method is used to study sound quality Evaluation. To analyze the sound quality of ring tone.

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고시조에 표현된 한국인의 소리인식 조사에 관한 연구 (The Korean's Sound Recognition Impressed in Ancient Sijo)

  • 이태강;장길수
    • 한국소음진동공학회논문집
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    • 제15권6호
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    • pp.724-730
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    • 2005
  • Literary works contain various human emotion and historical, cultural background. It is very significant to understand sound recognition and receptions represented in many literary works. This study aims to investigate the sound impression on ancient Korean Sijo( Korean Verse) involved various traditional korean emotion, which were expressed in different situations. Firstly we selected the appropriate Sijo to express sounds, and then classified the sound, analyzed the meaning of recognition to the sound. The number of 297 sounds were classified into 13 categories, and 20 emotional meanings. Especially, 'internal sadness' characterized the korean rooted emotion were more expressed than other meanings and this meaning were symbolized by the sound of wild geese and cuckoos.