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논문 기본 정보

자료유형
학술저널
저자정보
정정호 (Fire Insurers Laboratories of Korea)
저널정보
한국소음진동공학회 한국소음진동공학회논문집 한국소음진동공학회논문집 제28권 제4호(통권 243호)
발행연도
2018.8
수록면
388 - 396 (9page)
DOI
10.5050/KSNVE.2018.28.4.388

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To measure the air-borne sound and floor impact sound insulation performance, the sound field correction of the receiving room was conducted using reverberation time. Reverberation time is varied by environmental conditions, characteristics of sound source, position of sound source and microphones, etc. The sound field correction method on a rubber ball impact sound was standardized. In this study, the reverberation time was measured and compared using an omni-directional loud-speaker, a half-omni-directional loud-speaker, and a sub-woofer. Reverberation times at below 500 ㎐ bands became shorter when the height of the Omni-directional loud-speaker was increased. The reverberation times measured with the omni-directional loud-speaker at 1.7 m height were similar with the reverberation times measured with the half-omni-directional loud-speaker. For the measurement of reverberation time in low frequency below 80 ㎐ band, sub-woofer was installed on the floor. Reverberation times measured with sub-woofer were shorter than reverberation times measured using the half omni-directional loud-speaker, and the deviation was smaller. In order to make a correction for the receiving room sound field condition on light-weight impact sound, the height of the omni-directional loud-speaker should be approximately 1.7 m. In addition, for the sound field correction of the rubber ball impact sound at below 100 ㎐ bands, the use of sub-woofer for sufficient generation of sound energy in the low-frequency band is needed.

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ABSTRACT
1. 서론
2. 공동주택 잔향시간 연구
3. 음원별 잔향시간 변화 실험
4. 결론
References

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