Svantek SVAN 977A - Page 134

134
SVAN 977A User Manual
RT60 Settings
Screen that enables setting the reverberation time
measurement parameters: Start Delay, Method, Octave,
Freq. Range, Recording Time, Time Step, Averaging,
Noise Mar., Logger Name and Level.
Chapter
12.2
Appendix E
Start Delay
Delay between pressing the <Start> key and the start of
measurement integration.
Chapter
12.2
Method
Method of the RT60 calculation: Decay (Interrupted
Noise Method) or Impulse (Impulse Response Method).
The selection of the method depends on the used type of
the sound source.
Chapter
12.2
Appendix E
Impulse
Method of RT60 calculation that uses the impulse sound
source (like pistol shot, petard explosion).
Chapter
12.2
Appendix E
Decay
Method of RT60 calculation intended for measurements
when room is excited by broad or narrow band sound
noise source (usually pink noise).
Chapter
12.2
Appendix E
Octave
Type of spectrum (1/1-octave or 1/3-octave) based on
which the RT60 analysis is performed.
Chapter
12.2
Appendix E
Freq. Range
Frequency range for RT60 calculations: 63Hz-4kHz (7
bands) and 63Hz-16kHz (9 bands) for 1/1-octave; 50Hz-
5kHz (21 bands) and 50Hz-20kHz (27 bands) for 1/3
octave.
Chapter
12.2
Appendix E
Recording Time
Time of measurement data (sound pressure level decay
curve) registration during RT60 calculations: 1s .. 30 s.
Chapter
12.2
Appendix E
Time Step
Time-step of data registration (sound pressure level) in
the file during RT60 calculations: 2, 5, 10, 20, 50,
100 ms.
Chapter
12.2
Appendix E