한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)

한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
권호 표지

소음계 교정 자동화 시스템 개발 및 성능평가

Development and Performance of Automated Calibration System of Sound Level Meters

  • 김용태 (한국표준과학연구원 음향.진동 그룹) ;
  • 조문재 (한국표준과학연구원 음향.진동 그룹) ;
  • 이용봉 (한국표준과학연구원 음향.진동 그룹) ;
  • 서재갑 (한국표준과학연구원 음향.진동 그룹) ;
  • 서상준 (한국표준과학연구원 음향.진동 그룹)
  • 발행 : 1998.04.01
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초록

An automated calibration system of sound level meters was developed and tested. As a standard sound source, the speaker unit(Forstex FE208) cabineted by 440 * 390 * 490 mm$^{3}$(LHW) volume wood box was adopted. Including this source, the driving part was found out to have a good linearity of sound pressure output vs AC input. We use the Hybrid-Bisect, /Newton-Raphson method modified by the linearity as searching algorithm. Personal computer and program do the control, measurements, and calculations and finally do the accumulation of useful data and results. Several trials of automatic calibration using this developed system give reliable results.

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