Installed Sound Solutions


Clarity of sound and intelligibility of speech are the most important factors for successful installation of audio-acoustic systems in large commercial spaces, multi-purpose public rooms, teleconference systems, auditoriums, airports, train stations and stadiums.

NTi Audio provides contractors and audio engineers with a comprehensive set of diagnostic and measurements tools. They are perfectly tailored for installing, commissioning and troubleshooting sound and audio systems in cinemas, studios, broadcast and fixed installations so that the conference PA system produces acceptable levels of intelligibility of speech, the background music is audible and at a pleasant level and, most critically, announcement and emergency messages are loud and clear wherever you may be located in the building.


  • Commissioning, verification, periodic performance checks and troubleshooting of electro-acoustic installations at airports, railway stations, public buildings including 70/100V installations
  • システム仕様やIEC 60849、 EN 54-24などの規格適合の確認 
  • IEC 60268-16に準拠した音声明瞭度STI-PAの測定 


  • 現場での使用に適したハンドヘルド型のコンパクトデザイン  
  • テスト結果はすべてMini-SDカードに保存でき、後のドキュメンテーションが可能
  • ユーザー定義のスタートアップ・プロファイルの利用と前回のデータへテスト結果を追加するカスタマイズ測定により効率を改善
  • 校正済みオーディオ&アコースティック測定システム

XL2 with M4260 Measurement Microphone
XL2 Audio and
Acoustic Analyzer

Minirator MR-PRO
Minirator MR-PRO

Speech Intelligibility

The XL2 measures the intelligibility of speech in an installed environment and generates a measurement report. The measurement set provides you with the functionalities for detailed analysis of sound pressure level, frequency response, reverberation time, ambient noise and distortion, which influence speech intelligibility.

“What’s that hum? Why is there no sound?”

The Minirator signal generator and XL2 Analyzer are valuable instruments for fast troubleshooting of the audio signal path throughout the installation.
The MR-PRO verifies phantom power supply of microphones, checks XLR cables and measures the load impedance of 70/100 Volt speakers.

Polarity, Delay, Reverberation Time

Use the MR-PRO with the XL2 for an in-depth verification of the polarity - frequency relation for speaker cabinets or other multi-way systems. Configure your delay speakers and analyze the reverberation time RT60 to improve the sound quality and speech intelligibility.

Noise Curves and System Spectral Response

Use the Minirator to set up PA systems and monitors. Generate pink noise and optimize the frequency response of your system with the XL2 Analyzer. Measure the spectral distribution of the ambient noise with the optional Noise Curve function to verify if the noise rating requirements are met.

Speech Intelligibility STIPA Measurement

Talkbox on Stand
NTi Audio TalkBox
The TalkBox allows performing the complete end-to-end evaluation of the speech intelligibility STI-PA from the talker’s microphone to the listener’s ears. It is an acoustic signal generator for speech intelligibility measurements in evacuation and announcement systems.



NTi Audio TalkBoxは、そうしたマイクロホンのセットアップを効率的なものに改善します。TalkBoxは、リファレンスとなる人のスピーチ信号や標準的なオーディオテスト信号を出力します。これにより、一人でも会議システム全体の調整を素早く完了できます。さらに、例えば電話会議アプリケーションにおいて、システムの周波数フラットネスやレスポンスを調整する場面で応用できます。


Impedance Testing of 70/100V Systems

Minirator MR-PROはディストリビューションスピーカーシステムのインピーダンスと定格電力を測定します。仕様値と実測値の差により、例えば接続ミス、タップ配線の誤り、回路ショート等の問題を発見できます。オプションの70V/100Vプロテクトアダプタを使用することにより、MR-PROを安全に使用できます。

The impedance test supports the verification of distributed loudspeaker installations and shows detailed information of the connected load. The test result shows if the connected speaker system is in good order as well as the required amplifier power ratio. The power is automatically calculated by the measured impedance for 25 V, 35 V, 50 V, 70.7 V, 100 V, 140 V, 200 V systems.

      Minirator MR-PRO Impedance Detail       Minirator MR-PRO Power
                    Impedance and Phase                                    Apparent Power and Phase


Exel Installed Sound Set

Exel Set for Installed Sound

  • XL2 オーディオ&アコースティックアナライザ
  • STIPA オプション
  • M4260測定用マイクロホン
  • Minirator MR-PRO
  • XL2 用ASDケーブル
  • ケーブルテストプラグ
  • MR-PRO 70/100V プロテクトアダプタ
  • XL2用ACアダプタ
  • MR-PRO用ACアダプタ
  • Exel システムケース


NTi Audio TalkBox

Acoustic Generator (STIPA Reference)

Spectral Limits Option

for Noise Curve Measurements


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 • FBI • Ford Audio Video • G+M Audio • Gade & Mortensen  • Akustik A/S • Gansu Tianxing Rare Earth Functional Materials Co. • Ltd • 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 AG • Skywalker Properties Ltd. • SNCF • 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 ...



NTi Audioへのお問い合わせ

NTi Audio Contact Japan  
岡安 達也

Customer Comments

"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