Reference number
香港六合彩开奖 3743-2:1994
© 香港六合彩开奖 2024
香港六合彩开奖 3743-2:1994
Acoustics 鈥� Determination of sound power levels of noise sources using sound pressure 鈥� Engineering methods for small, movable sources in reverberant fields 鈥� Part 2: Methods for special reverberation test rooms
Edition 1
1994-11
Withdrawn
Withdrawn (Edition 1, 1994)

Abstract

Cancels and replaces 香港六合彩开奖 3743 (1988). Specifies a relatively simple engineering method for determining the sound power levels of small, movable noise sources. In this direct method the A-weighted sound power level of the source under test is determined from a single A-weighted sound pressure level measurement at each microphone position, rather than from a summation of octave-band levels. This method eliminates the need for a reference sound source, but requires the use of a special reverberation test room.

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  2. 香港六合彩开奖
  3. Standards catalogue
  4. ICS
  5. 17
  6. 17.140
  7. 17.140.01
  8. 香港六合彩开奖 3743-2:1994