NTi Audio Minilyzer ML1 - Manual (Page 20)

20
Sound Pressure Level
In the LEVEL SPL mode the Minilyzer measures the integrated-
averaging level over time, the actual, minimum and maximum sound
pressure level.
NOTES • For this function a self powered microphone is
required. NTi Audio does recommend to use the
accessory MiniSPL (for details see Accessories).
• Prior the first measurement the Minilyzer has to
be calibrated to the microphone specifications.
As default the ML1 is calibrated according the
Minispl.
• No phantom power is available on the XLR-input.
a. Sound Pressure Level Panel
Fig 3.3 Sound Pressure Level Panel
Calibration
Minimum,
Maximum or
Actual SPL
Pause Clock
Equivalent
Continious
Sound
Pressure
Level
Time
Weighting
SPL Bargraph with manual ranging
To enter the LEVEL SPL mode (Fig 3.3), select LEVEL -> SPL in the
measurement functions submenu.
For most of the ML1 applications, the sound pressure level
measurements require the use of the A-weighting filter. To prevent
wrong filter settings, causing wrong non-usable test results, the default
filter setting of the “LEVEL->SPL” mode is A-weighting (A-WTD).
Note: Each time the LEVEL SPL mode is selected the
A-weighting filter is pre-set by default.
Measurement Functions