AVI-Installation Solutions

AV Installation Test Solution

Teleconference systems play a significant role in today's connected world, allowing companies to communicate seamlessly across continents. Proper system alignment, delivering consistent speech levels and excellent intelligibly is a key success factor for the installing company.

The conference participants expect that they be allowed to concentrate on the business topics at hand and not be distracted by any inadequacies or failures in the communication system. NTi Audio equipment provides you with the tools to align the systems and rooms with excellence and confidence.


  • Installing conference and tele-presence systems
  • Commissioning, tuning, optimizing, verification, periodic performance check and maintenance of audio-acoustic installations
  • Measuring acoustic characteristics and insulation of the conference and adjoining rooms


  • Handheld solution with separate devices for sound source and analysis allows you to quickly measure many positions in the room.
  • TalkBox offers a calibrated sound source for objective simulation of persons speaking into a microphone.
  • Verify speech intelligibility STIPA at each seat in the conference room.
  • All measurement results are stored to the XL2 SD Card for documentation.

XL2 Measurement Functions

XL2 with M4260 Measurement Microphone

XL2 Audio and
Acoustic Analyzer

Speech intelligibility STIPA

Measures the speech intelligibility of conference systems using the TalkBox as signal source.

Real Time Analyzer RTA

Measure the room in 1/3 Octaves to determine the background noise and calculate the Noise Curves. Also calculate the sound insulation index from airborne noise to objectively determine the levels of privacy within the room as well as levels of annoyance from adjoining rooms.

Sound Pressure Level SPL

Setting up of sound levels for best and standardized performance.

Sound Insulation

The XL2 measures the sound insulation between rooms or indoor-outdoor areas. The impact sound insulation, e.g. footsteps, is measured by using a tapping machine. The level difference between two rooms might be corrected with the influence of the background noise in the receiving room.

RT60 Reverberation Time

Verifies the room acoustics for optimized system performance and speech intelligibility.

Noise Curves

Measure the spectral distribution of the ambient noise with the optional Noise Curve function to verify if the noise criteria requirements are met.

Test, One, Two

Talkbox on Stand
NTi Audio TalkBox
You will often hear installation engineers repeating the phrase "test, one, two" while setting up microphones. They are not practicing counting; they are checking the frequency response of the microphone. The "uhn" sound of the word "one" produces a low vocal frequency, while the ‘t’ sound in ‘two’ produces a high vocal frequency. (Counting "three, four" adds no more value except perhaps to demonstrate that we installation engineers can, in fact, count past two.)

The NTi Audio TalkBox simplifies and improves the setup of microphones by generating a reference human speech signal or other standard audio test signals, so that all frequencies (not just the frequencies produced by "one, two") can be efficiently adjusted by a single person.

The TalkBox generates all test signals for professional conference room commissioning. Simply position the TalkBox at each speaking position.

Speech intelligibility STIPA

The NTi Audio TalkBox generates the speech intelligibility test signal, at the level of a normal spoken voice, into the talker's microphone for STIPA measurements with the XL2 Analyzer.

Signal Generator Functions

Minirator MR-PRO

Minirator MR-PRO

Provides line test signals for system verification and fine tuning.

Order Information

Exel AV Installation Set

Exel Kit for AV Installations

  • XL2 Audio and Acoustic Analyzer
  • STIPA Option for XL2
  • M4260 Measurement Microphone
  • Minirator MR-PRO
  • ASD Cable for XL2
  • 2x Mains Power Adapter
  • Exel System Case

Optional as required:
  • NTi Audio TalkBox
  • Spectral Limits Option for XL2

Get more Information

Buy at the web shop or contact NTI Americas .

Reference Customers

2Oscars Kinotechnik • A&T Trade • ABB Alstom• Apple Sound Ltd. • Audix Systems • Bosch • Bose • BP • CCTV • Cirque du Soleil-Mandalay Bay • Cisco • City of Edmonton • deciBEL • Deutsche Bahn • Disneyland Scientific Systems • Doppler Acoustics • DreamWorks Animation • EnBW Kernkraft GmbH • Ericsson AB • European Commission - DG JRC • Ford Audio Video • G+M Audio • Gade & Mortensen  • Akustik A/S • Gansu Tianxing Rare Earth Functional Materials Co. Ltd • Google • Gulf Security Equipment Co. • HafenCity Universität Hamburg • Hamann Media Tec GmbH & Co KG • Honeywell • HP Sound Equipment SRL • IEC • Innotronic of Scandinavia ApS • Inspire Tech Ltd • ISO-Audio • Izotop Service Sp. z o.o. • Juka Lab • Kinoton Korea, Inc. • KKL Leibstadt • König Audio-Video-Technik GmbH • Messe Frankfurt Venue GmbH • New York City Transit • Overtron Light & Sound • PKE Electronics AG • Qatar Olympic Committee • Quantum Technologies, Inc. • Reuter Associates LLC • Sandia National Laboratory • Siemens • Skywalker Properties Ltd. • SNCF - French national railway company • Soundzipper • Sydney Trains • Technicolor • TOA Corporation UK Ltd • Trondheim Lyd Lysverket AS • TüV Nord Systems GmbH & Co.KG • TüV Süd Industrie Service GmbH • Tyco Fire & Security Spa • Verizon • Walt Disney World • WSP Group

more ...

Test Solutions for



Contact NTi Audio

NTi Audio Contact Americas  
Brian MacMillan
+1 503 684 7050

Customer Comments

Best Instruments for Audio
"In my opinion NTi Audio makes the best measurement instruments for audio industry. They are very comfortable to use and have high accuracy. I purchased XL2+M4260 set to apply them for my lab works, acoustics research and audio installation."
Alexander Kudriavtsev,
Starlingbox, Russia

For a better Sound

“If we could get more of the integrators in the region to use your kit, the world would be a better place! Well... at least it would sound better!”
Dave McMahon, dmc audio, UAE