Electra DCR 25 Service Manual page 22

6. SOUND LEVEL CHARACTERISTICS
6.1 Sound Pressure Level
Figure 1. Wall Mounted
Figure 3. Ducted
6.2 Soud Pressure Level Spectrum (Measured as Figure 1)
Delta 25
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
FAN SPEED LINE
HI
ME
LO
Service Manual - Delta DCI
SOUND LEVEL CHARACTERISTICS
Figure 2. Floor Mounted
Figure 4. Cassette
NC-70
NC-60
NC-50
NC-40
NC-30
APPROXIMATE
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
Revision Y05-01
CONTENT
Delta 35
BAND CENTER FREQUENCIES, Hz
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
6-1