7-1
SOUND LEVEL CHARACTERISTICS
SM GCD030 1-A.0 GB
7.
SOUND LEVEL CHARACTERISTICS
7.1
Sound Pressure Level
7.2
Soud Pressure Level Spectrum
DLS 30
PNX 30
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
OCT
A
VE
BAND
S
OUND
PRESSURE
LEVEL,
dB
re
0.002
MICRO
BAR
FAN SPEED
LINE
HI
ME
LO
CONTENTS