공학설계D/B

공학설계D/B 게시판 내용
Volume Title	Aircraft Noise
Volume No	General, Noise reduction and Noise estimation 1 (jet, fan/compressor sources - far field).
DATA Title	Combination of levels in dB.
DATA Item	66017
KEYWORD	combination, decibel, level, noise, pressure, sound
ISBN
ABSTRACT	ESDU 66017 provides a method of determining the combined sound level resulting from two or more sources of known levels. The method may be used to obtain the overall level for a single source by combination of the levels in particular frequency bands. Data are provided as an equation and in graphical form, and an example of their use is given.