Industrial Device Test Solution

Sound Power Testing

Sound power is the total amount of acoustic energy emitted in all directions by a source. The Sound Power Test System measures the required data and generates professional measurement reports.

The XL2 Sound Level Meter in combination with the Sound Power Reporter Software forms the professional solution for sound power measurements. The XL2 measures the noise spectrum of the device under test. Additionally it records the ambient noise and reverberation time RT60 for the required corrections. The Sound Power Reporter Software aggregates all data and provides the sound power in dB (reference to 1 pW).


  • Sound power level determination
  • Analyzing the sound power spectrum of machines or devices
  • ISO 3741, ISO 3744, ISO 3746 and 2000/14/EC
  • ANSI-ASA S12.51, S12.54, S12.56


  • Turnkey solution
  • Professional analysis and reporting

XL2 Measurement Functions

Real Time Analyzer RTA

The XL2 Sound Level Meter measures and logs wideband values and the real time spectrum in 1/1 or 1/3 octave band resolution in accordance with IEC 61260 class 0. The sound level meter results of the wide band and RTA spectrum are simultaneously available.

XL2 Sound Level Meter

RT60 Reverberation Time

The XL2 measures the energy decay in the range from 63 Hz to 8 kHz by the Schroeder method in 1/1 octave bands. Automatic triggering and averaging of multiple measurements simplifies the operation and minimizes the measurement time. Use either an impulse source or an interrupted pink noise as the test signal. The optional Extended Acoustic Pack extends the RT60 measurement to a 1/3 octave resolution.

XL2 RT60 Reverberation Time

XL2 Sound Power Option

XL2 Sound Power Reporter is a PC-based software application that provides comprehensive reports for sound power measurements in accordance with ISO 3741 / 3744 / 3746 and ANSI-ASA S12.51 / 54 / 56. Designed for industrial professionals, this comprehensive tool uses data gathered by the XL2 Sound Level Meter, and quickly returns graphical analysis of all measurement positions.

The Sound Power Option enables the import of measurement data into the XL2 Sound Power Reporter software.

XL2 Sound Power Reporter Results

Features of the Sound Power Reporter software:
  • Visualization of all measurement
  • Customized Reporting
  • ISO 3741, ISO 3744, ISO 3746
  • ANSI-ASA S12.51, S12.54, S12.56

NTi Audio #:
  • XL2 Sound Power Option: 600 000 434
    (permanently installed option in XL2)
  • Sound Power Reporter 365: 600 000 435
    (annual subscription service)
Product Data
User Manual

Type Approval Option

The Type Approval Option, when installed on your XL2, upgrades the instrument to the XL2-TA, the sound level meter for certified measurements. The XL2-TA, together with the M2230 microphone and Shroud jacket, forms a type-approved sound level meter offering class 1 performance in accordance with IEC 61672:2014, IEC 61260:2014, ANSI S1.4:2014 and ANSI S1.11:2014 standard.

Type approved sound level meter configuration:
  • XL2-TA Sound Level Meter (XL2 with Type Approval Option installed)
    • Firmware V3.11
    • Optional: Extended Acoustic Pack Option
    • Optional: XL2 Input Keypad
  • M2230 Measurement Microphone
  • Shroud MXA01

XL2-TA Type Approval Certificate

Order Information

Exel Sound Power Set

Exel Sound Power Measurement Kit

  • XL2 Audio and Acoustic Analyzer
  • Extended Acoustic Pack for XL2
  • Sound Power Option for XL2
  • M2230 Measurement Microphone
  • ASD Cable for XL2
  • Mains Power Adapter
  • Exel System Case

Optional as required:

Type Approval Option for XL2

for type approved measurements and certification

Precision Calibrator

for user calibrations

Get more Information

Buy at the web shop or contact NTI Americas .

Get the Sound Power Reporter Software

Sound  Power Option

In order to import data from your XL2 Sound Level Meter to the Sound Power Reporter PC-Software, the Sound Power Option needs to be purchased and installed on each XL2 Analyzer that will use it. Data which has been recorded prior the installation of the Sound Power Option may then also be imported. The Sound Power Reporter software can then be installed on an unlimited number of computers in order to analyze this imported data.

Sound Power Reporter 365

An annual subscription service is offered as an alternative to the Sound Power Option. The purchase of a Sound Power Reporter 365 subscription allows the unlimited import of measurement data from one XL2 Sound Level Meter into the Sound Power PC-Software for a period of one year.


Contact NTi Audio for the Sound Power Reporter PC software with demo data here.


The Sound Power Reporter software can be installed on multiple computers. This provides porfessionals with the freedom to distribute their measurement projects among team members and clients.

Technical Requirements

The software is compatible with Windows Vista, 7, 8.x, 10.

Other free reporting tools are offered for download at the XL2 support page.

Testing of

Contact NTi Audio

NTi Audio Contact Americas  
Brian MacMillan
+1 503 684 7050

Related Products