NTi Audio Acoustilyzer AL1 - Manual (Page 24)

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SPL/RTA - Sound Level Meter
The Acoustilyzer features a comprehensive, integrating sound level meter
with timer for single or repeated measurements. All results may be logged
into the internal memory for further review.
The measurements displayed on the big and small result position may be
chosen among
• SPL Actual sound pressure level
• MIN SPL Minimum sound pressure level
• MAX SPL Maximum sound pressure level
• Leq time-averaged sound pressure level
• PreLeq Leq of the previous timer period (only available
when timer is in repeat mode
• LCpeak C-weighted peak sound pressure level
The Timer can be configured to
• Stop the Leq, LCpeak and MAX/MIN SPL measurements after a
user-defined time period
• Reset the Leq, LCpeak and MAX/MIN SPL measurements after a
user-defined time period in order to start a new measurement
Time Weighting
indicator / selector
Timer
Status
Pause Measurement
Timer, Clock
Reset Test Cycle
Period
SPL Bargraph and range
indication
Input Range
indicator arrows
Big Result
Small
Result