NTi Audio XL2 Sound Level Meter - Manual (Page 22)

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Sound Level Meter
4. Sound Level Meter
The XL2 provides, together with the measurement micro-
phone, a precise sound level meter for monitoring live sound
events and/or environmental noise.
The Type Approval Option upgrades the instrument to the
XL2-TA, the sound level meter dedicated to certified measure-
ments. The XL2 with the M2230 microphone forms a type ap-
proved sound level meter offering class 1 performance accord-
ing IEC61672 (see chapter Options and Accessories)
For example, Actual, Lmin, Lmax, Leq with frequency weight-
ing A, C and Z and time weighting F and S can be measured
at the same time. All measurement results are simultaneously
available. You may log all acquired level information, including
real-time information, onto the removable SD Card. To com-
plete the documentation of the measured sound pressure lev-
els, the XL2 offers wav-file recording, as well as the facility
to add voice notes for each measurement. The XL2 measures
correction values between the loudest point of the live event
and the actual measurement positions in accordance with DIN
15905-5 and SLV. In parallel with the wide band parameters,
the XL2 measures the real-time spectrum either in 1/1 or 1/3
octave-band resolution. The RTA perfectly suits tasks such as
optimization of sound systems
Extended Acoustic Pack (optional)
The Extended Acoustic Pack offers the following additional fea-
tures for sound-level and acoustic measurements:
SLMeter/RTA function •
Recording of linear wav-files (24 bit, 48 kHz) -
Percentiles for wide band and spectrum with flexible set- -
ting from 1% to 99%
Sound Exposure Level L
- AE
100ms logging -
Event-triggered audio and data recording -
Time weighting: Impulse (LxI, LxIeq with x= A, C, Z) -
True peak level in 1/1 and 1/3 octave resolution -
Clock-Impulse Maximum Level (TaktMax) and values as -
specified in DIN 45645-1
FFT function •
High-resolution Zoom-FFT with selectable frequency -
ranges and resolution up to 0.4 Hz in the range of 5 Hz to
20 kHz
RT60 function •
Reverberation time RT60 in 1/3 octave resolution -