NTi Audio XL3
- Class 1 Sound Level Meter
- Spectrum, Reverberation Time, Sound Insulation Analyzer
- Touch Display
- Single-range Measurement
- Integrated web and file server
- 8 hours battery life
The XL3 is a professional sound level meter and acoustic analyzer dedicated to noise measurements, room acoustics and building acoustics applications. The intuitive user interface is optimized for basic noise monitoring applications as well as offering extensive analysis tools for professionals. The sound level meter is fully networked and therefore allows operation and data access from any mobile device.
Smart User Interface
The XL3 includes an integrated web server and file server accessible through the instrument’s built-in Wi-Fi or LAN connectivity. Just use your preferred web browser and connect to the sound level meter through the NTi Connect service. The instrument can be controlled by an authorized user from anywhere in the world. Alternatively, you can connect directly to the device’s IP Address through your local network – e.g., in building acoustics, the impact sound level measurement can be started directly from the sending room.
All measurement data can be easily downloaded without interruption to an ongoing measurement. To log prevailing weather conditions, a weather station can be added. Additionally, the online XL3 synchronizes to the actual time automatically using the ntp protocol. This and the optional APIs for controlling the instrument to retrieve historical and current noise, audio and weather data simplifies the integration into monitoring systems.
Open Data Format
All measurement data is stored in an open txt-format on a removable 32 GB SD card for download via USB-C. This capacity can be increased to terabytes of storage with a larger SD card or an external SSD. Additionally, an audio signal is recorded.
The XL3 is optimized for integration into customized noise monitoring applications – the sound level readings may be optionally streamed in an efficient binary format. At the same time the live audio is available online for identifying annoying noise sources.
Swiss Precision Engineering
This sound level meter builds on the latest processor and display technologies to provide a comfortable user experience. High-performance hardware packed in a robust housing offers precise 96 kHz data sampling in 32-bit resolution. With a frequency range from 0.3 Hz – 45 kHz, the XL3 is prepared for infra and ultra sound measurements. With single-range measurement and the automated sensor detection reading the electronic data sheet from the connected measurement microphone, the XL3 Acoustic Analyzer is indeed the equivalent of a Swiss Army knife for noise measurement professionals.
The XL3 is a professional sound level meter and acoustic analyzer for noise measurements, room acoustics and building acoustics – optimized for the needs of the acoustician.
Class 1 Sound Level Meter
The XL3 forms a class 1 sound level meter in combination with the measurement microphones M2230 or M2340. All sound pressure levels are measured precisely at the same time and presented in large digits on the color display. Readings exceeding the preset limit turn red indicating non-compliance, while the data is logged in 1 second intervals and the audio is recorded simultaneously. The XL3 is the perfect tool for an easy investigation of noise complaints and long-term noise monitoring. Type approval is pending.
Additionally, the noise spectrum is measured in both octave or one-third-octave resolution, e.g. for tonality investigations, as well as the optional event-marker, back-erase and pre-trigger – all of which extend the sound level meter capabilities for effective attended environmental noise surveys.
At the same time, the XL3 Sound Level Meter is optimized for unattended noise monitoring. The instrument automatically continues the measurement as soon as power resumes in case of an accidental power failure. The long battery life time and the versatile connectivity options allow online control from your preferred web browser from anywhere around the globe including audio streaming for live listening. A weather station may be connected directly to the XL3 and external devices controlled via the accessory I/O-PCB.
All stored measurement data is available in simple text format. Detailed data evaluation and rating level calculations are carried out in the optional Data Explorer PC Software.
- Class 1 using M2230 or M2340 Measurement Microphone
- IEC 61672, IEC 60651, IEC 60804, IEC 61260
- Germany: DIN 45645-1, DIN 45645-2
- Japan: JIS C1509-1:2005, JIS C 1513 class 1, JIS C 1514 class 0
- US: ANSI S1.4:2014, ANSI S1.43, ANSI S1.11:2014
- Sound levels
- SPL actual, Lmin, Lmax, Lpeak, Leq, gliding Leq
- Clock-impulse maximum level “TaktMax” in accordance with DIN 45645-1
- Calculated levels LCeq – LAeq, LAFT5eq -LAeq
- Frequency weighting: A, C, Z (=flat) simultaneously
- Time weighting: Fast, slow and optional impulse simultaneously
- Correction values k1, k2
- Indicators show when sound level limits are exceeded
- Calculated levels: LAIeq – LAeq (optional)
- Digital I/O interface for the control of external peripherals (planned)
- Sound Exposure Level LAE (optional)
- Percentile statistics for Lxy (x= A, C or Z, y= F, S or EQ1″): 0.1 – 99.9% (optional)
- Level-time history graph
- Back-erase (optional, planned)
- Pre-trigger (optional, planned)
- Logging and Reporting
- All levels simultaneously
- Short-time levels including spectrum for 1 second
- Wav-file for listening (compressed)
- Data logging in 100 ms intervals (optional)
- Linear audio: 24, 32 bit with 12, 24, 48, 96 kHz (optional)
The XL3 determines the frequency spectrum with a Class 1 filter bank in octave or one-third octave resolution between 6.3 Hz and 20 kHz. The minimum, maximum and average sound pressure levels of all frequency bands are measured in parallel. The frequency axis can be freely zoomed and scrolled to e.g. 125 Hz – 8 kHz for appliance noise investigations. The summed level of the selected frequency range is shown in the spectrum view at the same time.
- Class 1 according to IEC 61260 and ANSI S1.11 with filter base 10
- Octave band: 8 Hz – 16 kHz, one-third-octave band: 6.3 Hz – 20 kHz
- Leq, Lmax, Lmin with frequency weighting A, C, Z
- Time weighting: Fast, slow
- Percentile statistics for Lxy (x= A, C or Z, y= F or S): 1 – 99% (optional)
The XL3 measures the reverberation time in octave bands from 63 Hz – 8 kHz using the standardized T20 or T30. The room may be excited using an impulse source or an interrupted pink noise. The Acoustic Analyzer averages all the recorded decays for each measurement position automatically. Additionally, installing the Extended Room Acoustics Option enables reverberation time measurement in one-third octave resolution, visualizing the decay curve, calculating the spatial average of the room and simultaneous T30/T20/T15/EDT measurement on the XL3 Acoustic Analyzer. Additional quality indicators, such as linearity and curvature, describe the decay curve in accordance with the standard ISO 3382-2. An audio file of the level decay may be recorded for more detailed analysis.
- ISO 3382 and ASTM E2235 based on Schroeder backward integration
- Octave band: 63 Hz – 8 kHz
- Measurement parameters T20, T30
- Impulse and interrupted noise source
- Automatic averaging for each position
- 1/3 octave band: 50 Hz – 10 kHz (optional)
- T20, T30, T15, EDT simultaneously (optional)
- Calculating spatial room average (optional)
- Audio recording (optional)
- Minimum trigger level (optional)
- Decay curve (optional, planned)
Sound Insulation (optional)
The XL3 Acoustic Analyzer enables direct determination of airborne, impact and facade sound insulation on the instrument. Simply measure in the sending and receiving room and see the sound insulation values displayed for immediate compliance confirmation on-site. For additional partitions with the same source or receiving rooms, the XL3 offers time-saving features by re-using of measurement data from previous measurements e.g. reverberation time data or background noise measurements for a common receiving room. In order to prevent any sound absorption from your body, you can leave the room and control the instrument from your mobile phone using Wi-Fi or the 4G/5G network. Generating the final measurement report for sign-off is easy utilizing the optional Sound Insulation Reporter PC Software.
- Airborne and impact sound insulation on XL3
- Standards ISO 16283 and ISO 717
- Automated measurement data averaging
- Re-use of existing data
- Results D, D’n, D’nT and R’
- Chart and table
A range of measurement microphones are available to suit your requirements. The measurement microphones combine with the analyzer for a comprehensive sound level meter and acoustic analyzer.
The microphones are 48V phantom powered and include an electronic data sheet. The Automated Sensor Detection (ASD) of the Analyzer automatically reads this data, i.e. the microphone model and calibration data. This promotes faster setup and ensures accurate measurements.
The MA220 and MA230 offer a low noise microphone preamplifier compatible with standardized 1/2″ microphone capsules. Both include an electronic datasheet for fast setup and ensuring accurate measurements. The MA230 is additionaly enabled for periodic self-tests (Charge Injection Check CIC) dedicated for permanent noise monitoring stations.
NTi Audio #:
- MA220: 600 040 040
- MA230: 600 040 200
Protect your measurement microphone from rain, wind, dust and perching birds with a professional outdoor weather protection kit. The corrosion-free polymer housing, wind screen, water-repellent membrane and bird spike provide excellent protection from rain, wind, dust and perching birds. A weather protection is dedicated for precise acquisition of environmental noise data in outdoor applications.
There are two types available. The WP30 Weather Protection is dedicated for the ½” measurement microphones M2230 and M2340. On the other hand the WP61 Weather Protection is designed for the ¼” measurement microphone M4261. An outdoor measurement microphone consists of a measurement microphone and a weather protection.
NTi Audio #:
- WP30: 600 040 060 (without microphone)
- WP61: 600 040 080 (without microphone)
The outdoor measurement microphone may be installed on a pole using an adapter. The microphone is connected to the sound level meter by the ASD cable, which runs through the pole and the adapter to the microphone. The adapter is available in two different sizes.
NTi Audio #:
- Pole Mount Adapter PM 1″: 600 040 067
supports pole diameter 25 – 33 mm (1-1.3″)
- Pole Mount Adapter PM 1 1/4″: 600 040 068
supports pole diameter 32 – 44 mm (1.25-1.75″)
The Dehumidifier protects the microphone capsule from possible water damage caused by condensation due to high humidity. This provides reliable and precise measurements in changing environmental conditions. The Dehumidifier is an accessory for the outdoor measurement microphone M2230-WP (= M2230 with WP30) and M2340-WP (= M2340 with WP30).
NTi Audio #: 600 040 063
Class 1 Sound Calibrator
The battery-operated Class 1 Sound Calibrator is classified for the calibration of class 1 measurement microphones, sound level meters and other acoustic measurement equipment. This precision microphone calibrator delivers 94 or 114 dB at a frequency of 1 kHz.
NTi Audio #: 600 000 388
Add the “1/4″ Calibration Adapter” to fit 1/4” measurement microphones into the Class 1 Sound Calibrator. NTi Audio #: 600 000 391
Class 2 Sound Calibrator
The battery-operated Class 2 Sound Calibrator is classified for the calibration of class 2 measurement microphones, sound level meters and other acoustic measurement equipment. This microphone calibrator delivers 114 dB at a frequency of 1 kHz.
NTi Audio #: 600 000 394
XLR Adapter ASD
XLR male/female Adapter with electronic data sheet for automated sensor detection (ASD) of other sensors. The adapter is available in two variations: The type ASD-2 is used for measurement microphones with isolated housing ground connection and the type ASD for induction loop and other sensors.
NTi Audio #:
- XLR Adapter ASD: 600 000 383
- XLR Adapter ASD-2: 600 000 385
ICP Adapter ASD
The ICP Adapter connects to the analyzer and generates ICP power supply for other custom sensors. The adapter offers an electronic data sheet, which stores the sensitivity and individual serial number of the connected sensor.
NTi Audio #: 600 010 223
The ASD Cable allows for extended connections of the NTi Audio measurement microphones. It supports the transfer of the electronic data sheet from the microphone to the Analyzer.
NTi Audio #:
- 5 meter (16 feet): 600 000 336
- 10 meter (32 feet): 600 000 364
- 20 meter (64 feet): 600 000 365
The ASD technology offers the electronic data sheet transfer for cable length until 20 meter (64 feet).
ASD Flat Ribbon Cable 1m
Microphone cable for passing closed windows or doors. It supports the transfer of the electronic data sheet from the microphone to the Analyzer.
NTi Audio #: 600 000 367
Tracer Battery Adapter Cable
The Tracer Battery Adapter Cable connects the Tracer battery pack to an Analyzer. It ensures that the connected instruments start up properly if the battery has been completely discharged.
NTi Audio #: 600 000 478
Ball Head Mount
This flexible universal joint mounts the device on a 1/4″ or 3/8″ stand. It provides the facility to mount the analyzer at any angle.
NTi Audio #: 600 000 387
A 5/8″ stand requires additionally the Mounting Adapter, # 600 000 372.
This mechanical adapter piece mounts the analyzer on a microphone stand. Adapters for 3/8″ or 5/8″ stands are included.
International #: 600 000 372
Retractable, lightweight tripod with 1/4″ ball head and 3/8″ mounting thread. The flexible ball head mounts the Analyzer at any angle. The tripod is suitable for all measurement microphones, the outdoor microphone and the TalkBox.
Height: 115 – 140 cm, 45 – 55″
Weight: 1.4 kg, 50 oz
Folded: 11 x 8 x 56 cm, 4″ x 3″ x 22″
Unfolded area: 80 x 80 cm, 32″ x 32″
NTi Audio #: 600 000 397
The 4G/LTE Gateway is a small, lightweight, and energy-efficient industrial gateway equipped with mission-critical LTE capabilities, Gigabit Ethernet interface, digital Inputs/Outputs, and micro-USB port.
This 4G/LTE Gateway has been specially selected for use with the Sound Level Meter. It connects the analyzer to the internet for remote monitoring of noise levels.
NTi Audio #:
- 4G/LTE Gateway: 600 076 011
(worldwide exluding Americas, China, Japan)
- 4G/LTE Router: 600 076 012
Rain, strong wind and the wind direction can influence the outdoor sound pressure level to be measured. Connect a weather station to your noise measurement station to simultaneously record the noise level and the weather data. Depending on the weather station model used, air pressure, temperature, air humidity, rain, wind speed and wind direction are documented. NoiseScout supports the Vaisala models WXT532, WXT533 and WXT536.
- Weather Station WXT532
(wind speed, wind direction)
NTi Audio #: 600 000 736
- Weather Station WXT533
(wind speed, wind direction, rain fall)
NTi Audio #: 600 000 737
- Weather Station WXT536
(wind speed, wind direction, rain fall, temperature, air pressure, humidity)
NTi Audio #: 600 000 738
- Over-voltage Protection for Weather Station
NTi Audio #: 600 000 739
The Ever-ready Pouch protects the XL3 during transport and operation. With its convenient belt-clip, the XL3 can be kept close by for those tasks requiring both hands. The Ever-ready Pouch allows operation of the XL3 fitted in the pouch.
NTi Audio #: 600 000 735
This compact system case provides the professional transport protection for work in the field. It offers space for the handheld instruments, cables and connectors.
NTi Audio #: 600 000 701
The backpack provides the professional transport protection for work in the field. It offers space for the handheld instruments and accessories.
NTi Audio #: 600 000 706
Heavy-Duty Outdoor Case
The heavy-duty outdoor case is a professional solution for short- and medium-term unattended noise monitoring. The case provides comprehensive protection against dust, water and impacts. Internal dimensions provide ample space for battery packs to power the Sound Level Meter.
NTi Audio #:
- IP43: 600 000 704
- IP65: 600 000 705
Weatherproof Enclosure for Noise Monitoring Terminal
The weatherproof enclosure is the tailored fixed installation solution for unattended noise monitoring. The enclosure is IP66 (without ventilation) or IP55 (with built-in fan) rated, highly secure and constructed of strong, hard-wearing reinforced fiberglass.
The calibration certificate lists the individual product data with serial number. The calibration and adjustment procedures follow the documentation and traceability requirements of the EN ISO / IEC 17025 standard.
Annual re-calibration of the instrument after the purchase is recommended ensuring accurate measurements.
NTi Audio #: 600 000 018