Sound Levels - York YUHA 18 FS Service Manual

10 . Sound Levels

CONCEALED DUCT TYPE
Duct
18,000 BTU/H
Audibility limits of
continuous white
sound
Octave band center frequency 0 Hz 1
36,000 BTU/H
Audibility limits of
continuous white
sound
Octave band center frequency 0 Hz 1
1.0m
Microphone
24,000 BTU/H
Audibility limits of
continuous white
sound
Octave band center frequency 0 Hz 1
48,000 BTU/H
Audibility limits of
continuous white
sound
Octave band center frequency 0 Hz 1