NTi Audio Minilyzer ML1 User Manual

Page 21

start of measurement: The sound pressure level measurement is

re-started every time
• The LEVEL SPL screen is entered

• The filter selection is changed.

• The clock is reset.

• The time weighting selection is changed.

• The bargraph range selection (RNGE) is changed.

Sound Pressure Level: The equivalent continuous sound pressure

level (also time-averaged sound level) is indicated in dBL

, dBL

Aeq

dBL

Ceq

, depending on the selected filter in the filter menu.

Example:
• select in the main menu the filter A-WTD

• the measurement unit is changing to dBL

Aeq

and the minimum,

maximum and actual sound pressure level readings below are

A-weighted.

Below the time-averaged SPL reading one of the following values

may be displayed (select with the cursor keys):
• ACT: actual sound pressure level (SPL)

• MIN: minimum sound pressure level acquired during the

measuring time indicated by the clock. The minimum value is

stored until a new lower reading has been taken.

• MAX: maximum sound pressure level acquired during the

measuring time indicated by the clock. The maximum value is

stored until a new higher reading has been taken.

pause: The L

and min./max. measurement may be freezed for a

user defined time.
• Select the pause symbol and press the enter key.

• The pause symbol is flashing.

• The actual SPL reading is continuously displayed and not

freezed.

• Select the pause symbol and press the enter key to continue the

measurement, visible by the continuing counting clock.

Clock: Duration in hours:minutes:seconds of the actual measurement;

select the clock and press the enter key to reset the time and restart

the measurement.

Measurement Functions