BRUEL & KJAER 3639-E Operation manual

PRODUCT DATA
Uses and Features
Uses
• Permanent and semi-permanent monitoring for:
– Aircraft and airport noise
– Road noise
–Citynoise
– Train noise
– Industrial noise
– Noise surveys
Features
• Designed for stable, long-term, continuous outdoor
monitoring
• Logging of broadband and 1/3-octave (optional) parameters
every second, or half-second
• Streaming of data over LAN to Environmental Noise
Management Software Type 7843 and ANOMS
• 40 GB industrial hard disk for safe, long-term backup
• Post-processing that can create periodic statistical reports
down to one minute, including LNdata
• Dynamic range of 110 dB
• Remote verification of the entire measurement chain using the
patented Charge Injection Calibration (CIC)
• GPS support
• Sound recording (optional)
• Weather-data monitoring (optional)
• Camera support (optional)
• Remote operation via LAN, public telephone lines, mobile
phone or GPRS
• Modular hardware/software for easy on-site servicing
• Noise event triggers can be defined on an hourly basis for more
efficient noise detection
Noise Monitoring Terminal Plus Type 3639-E
Noise Monitoring Terminal Advanced Type 3639-G
Noise Monitoring Terminals Type 3639 are a range of
powerful, modular, noise monitoring terminals, optimised for
outdoor use.
With a custom-designed enclosure, the Noise Monitoring Terminal
(NMT) is designed for use in all climatic environments, as well as
industrial, urban and rural conditions.
NMTs are intelligent units that can be left unattended as part of an
environmental noise monitoring system for permanent, mobile or
semi-permanent monitoring. With selectable communication and
central control software, the Noise Monitoring Terminal can be
controlled by a remote PC.

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Description
Noise Monitoring Terminals Type 3639 are a range of powerful NMTs optimised for remote, unattended,
environmental noise measurements, which:
• Regularly check the calibration of the measurement chain, including the outdoor microphone
• Measure noise with the outdoor microphone in compliance with IEC 61672 Class 1 specifications
• Process noise and associated data
• Store the results of up to several months of monitoring
• Transmit data via RS–232, LAN, router, or modem, to a database on a central computer
The NMT is a component of an unattended noise monitoring system. The main purpose of the system is to
monitor environmental noise from airports, construction sites, industries and transport, and in areas
either where noise is high (noise hot spots) or in quiet areas where noise is a major concern. A typical
system, for example for airport-noise monitoring, would consist of several NMTs, a central computer
system and a number of workstations.
The NMT consists of a weatherproof cabinet containing a noise level analyzer and a battery, with a back
plate for pole or wall mounting, and an outdoor microphone to be mounted on a mast, pole or tripod.
Additional accessories such as a GPRS Router, GSM modem, weather station and a GPS satellite
positioning system, can be added to the NMT (see Fig. 1).
Fig. 1
Overview of the noise
monitoring terminal
and its accessories
NMT PLUS Type 3639-E or
NMT ADVANCED Type 3639-G
Includes:
– Wall/Pole Mounting
Kit UA-1685
– Outdoor Microphone 4952
(NMT 3639-E)
– Weatherproof Microphone 4184
(NMT 3639-G)
– Battery QB-0065
– Battery Charger (built-in)
– Auxiliary DC Cable AO-0649
– USB Cable AO-1480
(NMT 3639-E/G-200 series)
– LAN Cable to Ext. PC AO-0679
– Auxiliary Mains Cable AN-0074
– Microphone Cable
AO-0414-D-100 (NMT 3639-E)
– Microphone Cable
AO-0028-D-100 (NMT 3639-G)
Options:
– Weather Station MM-0256 (6 param.)
– Weather Station MM-0316 (2 param.)
– GPS Receiver ZZ-0249
(requires GPS Software BZ-7845)
– PSTN Modem ZM-0070
– GSM Modem ZM-0071
– GPRS Router ZM-0073
– Environmental Noise
Management System 3642
– Sound Calibrator 4231
– ANOMS
– Event Analysis Software BZ-7844
(NMT 3639-E)
– Battery QB-0065
– Battery Charger ZG-0453
(for charging QB-0065 outside
the NMT)
– Tripod UA-0587 for microphone
– Tripod Adaptor DB-4024
– Tripod UA-1690 for NMT
– Outdoor Camera WQ-2837
– Low-temp. Operation Modification
– Solar Panels
External PC
Outdoor Microphone
4952
Weather Station
MM-0256 or MM-0316
Modem (PSTN or GSM)
/GPRS Router
Radio Link
(via modem)
or cable
Microphone Cable
AO-0414-D-100
External DC
Power
Optional Setup:
Auxiliary
Mains Cable
AN-0074
Auxiliary
DC Cable
AO-0649
NMT PLUS 3639-E
NMT ADVANCED 3639-G
050304/3
Auxiliary
Mains Cable
AN-0074
Auxiliary
DC Cable
AO-0649
Modem (PSTN or GSM)
/GPRS Router
Radio Link
(via modem)
or cable
Microphone Cable
AO-0028-D-100
Weatherproof
Microphone
4184
GPS Receiver
ZZ-0249
Tripod UA-0587
Tripod
UA-1690
Camera
WQ-2837

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The NMT is controlled remotely by Environmental Noise Management Software Type 7843 (see BP 2100),
ANOMS airport noise monitoring software or Noise Monitoring Software Type 7802 (see BP 1573),
allowing remote setup, data and system status viewing, data download and analysis. An option allows the
user or system integrator to implement control by third party software, through the documented
instruction set included with the relevant configurations.
The NMT is modular both in hardware and software, giving a very flexible solution that matches a wide
range of needs. Software modules are pre-installed on the NMT and licenses can be moved from one NMT
to another, if required, using Environmental Noise Management Software Type 7843. Using this control
software, the NMT can be configured as needs arise, making the system very cost-effective.
Configurations
Standard configurations of the NMT Type 3639 (see Tables 1 and 2) include:
• The support of two different microphones (Outdoor Microphone Type 4952 or Weatherproof Microphone
Type 4184)
• Remoteoperation by different central control software (Environmental Noise Management Software Type
7843, ANOMS airport noise monitoring software, Noise Monitoring Software Type 7802 or customer-
defined third party software), not included with the NMT. Each software opens up different functionality
in the NMT*. For example, Environmental Noise Management Software Type 7843 enables the Type
3639-E-200 series to:
– Continually stream user-defined data to the Environmental Noise Management System’s server or
ANOMS airport noise monitoring software’s server
– Operate as a broadband terminal with no noise event detection, thus permitting a very cost-effective
NMT both with growth potential and with the possibility for remote licensing for easy reconfiguration
to allow event detection (Type 3639-E Event Analysis Option BZ-7844)
• The support of different communication protocols: RS–232, PSTN and GSM, GPRS, LAN and WLAN,
depending on the NMT configuration and the central control software (not included with the NMT). Some
configurations include the required hardware for communication
Table 1 Overview of the standard configurations of Noise Monitoring Terminal Plus Type 3639-E
* See also Product Data for Type 7843, Type 7802 and the ANOMS Brochure.
NMT Microphone Central Control Software
Communication
Protocols Supported
(As Standard)
Noise Monitoring Terminal Plus Type 3639-E 4952 Brüel & Kjær NMS
Type 7802
RS–232, PSTN, GSM
Noise Monitoring Terminal Plus Type 3639-E-001 including
PSTN Modem ZM-0070 4952 Brüel & Kjær NMS
Type 7802
RS–232, PSTN
Noise Monitoring Terminal Plus Type 3639-E-002 including
GSM Modem ZM-0071 4952 Brüel & Kjær NMS
Type 7802
RS–232, GSM
Noise Monitoring Terminal Plus Type 3639-E-200 for
ENMS 4952 Brüel & Kjær ENMS
Type 7843, ANOMS
LAN, GPRS
Noise Monitoring Terminal Plus Type 3639-E-203 for
ENMS, with GPRS Router 4952 Brüel & Kjær ENMS
Type 7843, ANOMS
LAN, GPRS
Noise Monitoring Terminal Plus Type 3639-E-300 for
System Integrators 4952 Customer-defined
software
RS–232, PSTN, GSM
Noise Monitoring Terminal Plus Type 3639-E-301 for
System Integrators, with PSTN Modem 4952 Customer-defined
software
RS–232, PSTN
Noise Monitoring Terminal Plus Type 3639-E-302 for
System Integrators with GSM Modem 4952 Customer-defined
software
RS–232, GSM

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Table 2 Overview of the standard configurations of Noise Monitoring Terminal Advanced Type 3639-G
Outdoor Microphone Type 4952 (Type 3639-E)
Fig. 2
Outdoor Microphone
Type 4952 with
integrated coupling,
fitted on the top of a
water pipe
The outdoor microphone is a major factor in ensuring that the NMT complies with
IEC 61672 Class 1 requirements, with either 0 or 90 ° reference direction.
It functions correctly under conditions of up to 96% relative humidity, and in ambient
temperatures ranging from –30 to +55 °C. The precision condenser microphone is
protected inside the acoustically optimised windscreen, which has an anti-bird spike
fitted at the top. Construction is elegantly simple, ensuring longevity and low
maintenance costs.
The microphone can be mounted on standard 1″water pipe, allowing stable
mounting and secure cabling. A range of tripods and microphone mounting systems
(for example, 4 m masts and hydraulic masts) are available from, or can be
recommended by, Brüel & Kjær.
During transport, the microphone can be safely placed inside the NMT cabinet. For more information, see
Product Data BP 2099.
NMT Microphone Central Control Software
Communication
Protocols Supported
(As Standard)
Noise Monitoring Terminal Advanced
Type 3639-G 4184 Brüel & Kjær NMS
Type 7802
RS–232, PSTN, GSM
Noise Monitoring Terminal Advanced
Type 3639-G-001 including PSTN Modem ZM-0070 4184 Brüel & Kjær NMS
Type 7802
RS–232, PSTN,
Noise Monitoring Terminal Advanced
Type 3639-G-002 including GSM Modem ZM-0071 4184 Brüel & Kjær NMS
Type 7802
RS–232, GSM
Noise Monitoring Terminal Advanced
Type 3639-G-200 for ENMS 4184 Brüel & Kjær ENMS
Type 7843, ANOMS
LAN, GPRS
Noise Monitoring Terminal Advanced
Type 3639-G-203 for ENMS, with GPRS Router 4184 Brüel & Kjær ENMS
Type 7843, ANOMS
LAN, GPRS
Noise Monitoring Terminal Advanced
Type 3639-G-300 for System Integrators 4184 Customer-defined
software
RS–232, PSTN, GSM
Noise Monitoring Terminal Advanced
Type 3639-G-301 for System Integrators, with PSTN
Modem
4184 Customer-defined
software
RS–232, PSTN
Noise Monitoring Terminal Advanced Type
3639-G-302 for System Integrators with GSM Modem 4184 Customer-defined
software
RS–232, GSM

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Weatherproof Microphone Unit Type 4184 (Type 3639-G)
Fig. 3
Weatherproof
Microphone
Type 4184 with
adaptor, fitted on the
top of a water pipe
The weatherproof microphone is the ultimate outdoor microphone for permanent
installation in all environmental conditions, while ensuring that the NMT complies with
IEC 61672 Class 1 requirements.
It ensures accurate noise measurements in most humid and corrosive atmospheres with
rain protection according to IEC 529 IP44, and operation all the way up to 100% RH.
The microphone has excellent omnidirectional characteristics, allowing high accuracy with
fixed orientation and less dependency on the operator’s expertise. The CIC function is
complemented by a built-in test sound source (at 1 kHz) for actual calibration. For more
information see Product Data BP 0741.
Environmental Protection
Fig. 4
Noise Monitoring
Terminal Type 3639-E/
G – the electronics
inside the NMT are
well protected
The NMT has been specifically designed to operate unattended in inhospitable
environments, protecting the contents from weather and unwanted
interruptions due to tampering, vandalism, theft, etc.
All equipment is protected inside two interlocking cabinets. This dual cabinet
construction ensures optimal protection of the equipment, while securing a
growth path for future NMT solutions from Brüel & Kjær. A low-temperature
protection kit is available for continuous operation of the NMT under extreme
weather conditions*when running with mains power supply. The NMT also
includes a watchdog function that ensures that, in the rare event of the NMT
not operating (such as loss of power), it automatically restarts and continues
measuring.
The robust, durable, weatherproof cabinet includes a kit for fastening the
cabinet to a wall, a box-sectioned or tubular mast, a lamp post or similar
(diameter 40 – 200 mm, more if required) and the door seals the cabinet from
the outside environment and helps prevent tampering. The cabinet is well-
protected by a weatherproof locking mechanism on the door, and a padlock
can be mounted for security. The NMT also sends a signal to the remote
software when the door is open, allowing unauthorised intrusion to be detected and recorded. In
addition, protection is provided for cabling to reduce the risk of tampering or accidental damage.
The system includes one or two batteries for independent operation, and as a backup in the event of
power loss. It is possible to change the battery during operation for ease of maintenance and increased
independence. The batteries are charged whenever external AC or DC is applied to the NMT and charging
the batteries completely will take up to 24 hours.
Brüel & Kjær can supply External Charger ZG-0453 for charging the batteries, once they have been
removed from the NMT. The batteries can be fully charged in ten hours and one charger is needed per
battery.
* Contact your local Brüel & Kjær representative for more information.

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The NMT can be powered from a variety of sources, such as solar panels connected through the DC supply
input. An external UPS can be connected through the DC supply input.
The cabinet also includes a mains outlet and cable for peripheral equipment that can be powered from the
NMT. For example, a laptop can be powered from the NMT for setting up the NMT locally.
A 10 m microphone cable is included to ensure that the outdoor microphone and the cabinet can both be
positioned in the correct acoustical location, while being conveniently and securely mounted.
Due to the clever design of the NMT, it is easy to add new accessories, for example, a GPS unit, even after
the installation of the NMT on a wall or a pole.
Noise Monitoring and Analysis
Noise monitoring and analysis is performed by Noise Level Analyzer Type 4441 and System Controller
UL-0235. The Noise Level Analyzer measures data coming from the outdoor microphone and this data is
logged onto the System Controller.
The NMT can be calibrated using Sound Calibrator Type 4231. In addition, the system has built-in CIC
allowing automatic routine electrical checks to detect changes and faults in the system. CIC is a patented
technique used for remotely monitoring the entire measurement setup including the microphone,
preamplifier and connecting cable. The NMT can initiate up to four automatic, routine system checks per
day at user-specified times, storing results for later download and investigation.
A built-in display showing the primary measurement parameters and setup information is included for
servicing and type approval, it is only activated when the NMT cabinet door is open, reducing power
consumption.
The NMT complies with IEC 61672 Class 1 specifications and has a dynamic range of 110 dB.
Broadband Measurements and Frequency Analysis
The NMT performs all the broadband analyses needed for environmental noise measurements, measuring
Leq, Lpeak, Lim, Linst, Lmax, and Lmin. All values can be calculated for different time and frequency weightings
(see specifications).
The NMT performs octave or 1/3-octave analyses at filter centre frequencies from 12.5 Hz to 20 kHz. It
can also identify noise events, for example, to restrict the duration of frequency analysis to reduce
memory usage, and monitor LAeq-based statistics (for Type 3639-E-200 series configurations; this requires
a license for Event Analysis Software BZ-7844).
Storage of Results in a Database
The NMT stores data in a database on the System Controller. The standard capacity of the database is
40 GB, corresponding to an average of six months of storage time (depending on the remote control
software used). The retention period can be set up for all data sets.
The following parameters are stored:
• Hourly reports – Statistical information for every whole hour including Total Leq, Distribution
• Short reports – User-defined short reports for a period of 1 to 60 minutes calculating minimum values,
maximum values, Leq and five user-defined LNvalues
• Calibration reports – Automatically checks the calibration of the system four times a day using the patented
CIC check and stores the information in the database
The following is also stored (for Type 3639-E-200 series configurations, Event Analysis Software BZ-7844 is
required):
• Hourly reports – Extended to include Total Leq, Background Leq, Noise Event Leq
• Noise events – Detects noise events from any user-defined trigger level and duration, and stores the
information in a database. Event trigger level and duration settings can be set on an hourly basis, enabling

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the events to be set-up in accordance with the natural daily variations in the residual (background) noise.
For each event the following information is stored at ½ or 1 second intervals:
–SPLandL
eq values
– 1/3-octave spectrum, PNL (Perceived Noise Level) and PNLT (Perceived Noise Level, Tone Corrected)
values, according to ICAO Annex 16
– The sound file
Furthermore, EPN dB (Effective Perceived Noise Level) of all the events according to ICAO Annex 16 is
calculated and stored in the database.
All results can be downloaded to the central server provided with the supported central software (such as
Environmental Noise Management Software Type 7843) continuously, or viewed in real-time remotely
over a LAN or GPRS connection. With Noise Monitoring Software Type 7802, results can be downloaded
via the optional modems to supported central software at a user-defined time interval, for example, once
per day.
Sound Recording
Noise events can be recorded for later analysis or source identification (for Type 3639-A-, -B- or -E-200
series configurations, Event Analysis Software BZ-7844 is required). The files are stored as a compressed
file (MP3) reducing the time and load spent on downloading data from the NMT. Alternatively, the
recordings can be stored as high-fidelity wav files for post-processing, such as tone analysis using FFT in,
for example, PULSE™ LabShop. If desired, sound recording can instead be done at regular, user-defined
times. This enables the NMT to record sound at user-defined time intervals and durations for, for example,
1-minute sound recordings to be made at the start of every one hour in order to identify typical sound
environments.
Meteorological Data
With optional Weather Station MM-0256 installed, temperature, windspeed and direction, relative
humidity, air pressure and liquid precipitation can be monitored. Alternatively, a two-parameter Weather
Station MM-0316 for windspeed and direction can be installed. The external weather station, mounted for
example on a mast, is connected via a serial interface to the NMT’s System Controller. The station is
delivered with a license to run the weather-data logging software needed to store the weather data in the
NMT’s own database in the same manner as the noise measurements.
GPS Geographical Positioning
The NMT supports GPS so that, together with a standard commercial GPS receiver and antenna unit (for
example, GPS Receiver with Antenna ZZ-0249), position (longitude, latitude and height) can be monitored
and stored in the NMT’s own database in the same manner as the noise measurements.
Camera Support
The NMT can be configured to support an outdoor camera (for example, Outdoor Camera WQ-2837) so
that pictures can be taken at 1 s intervals during noise events. You can set up the maximum number of
pictures saved per event. This helps identify the causes or even individual offenders of the noise events
and ensures that the amount of data stored is optimised to give enough detail while limiting the amount
of data to be transferred and stored.
Communication, Analysis and Reporting
The NMT can communicate with a range of software, depending on the configuration selected, see Table
1 and Table 2.
The ‘200’ series NMTs can be controlled remotely by Environmental Noise Management Software Type
7843 or ANOMS airport noise monitoring software, via standard internet-based protocols such as LAN or
GPRS, as it is given an IP address. The NMT continually streams the data required by the ENM/ANOMS
software user to the system server while storing it locally on the NMT as backup. Transmission of data is
performed simultaneously with data logging, without data loss. Analysis and reporting of results are done
using Environmental Noise Management Software Type 7843, or ANOMS airport noise monitoring

8
software, whose servers can be configured to allow a number of NMTs to be connected and a number of
users to access the data simultaneously (see Product Data BP 2100).
The ‘000’ series NMT configurations can be controlled remotely by Noise Monitoring Software Type 7802
via an RS–232 interface. Optionally, the NMT can be configured with PSTN or GSM modem
communication. Again, transmission of data is performed simultaneously with data logging, without data
loss and analysis and reporting of results are done using Noise Monitoring Software Type 7802 (see
Product Data BP 1573).
The ‘300’ series NMT configurations allow remote control of the NMT by customer-defined third party
software, through the documented instruction set.
Services
Brüel & Kjær offers a wide range of support and services to ensure efficient and problem-free operation.
These include a range of calibration services (accredited, traceable), repairs, conformance tests, warranty
extensions, installation, training, help line and rental. Many of these services can be performed on-site, or
locally, as well as at the factory.
Annual and long-term service packs for the NMT and for an entire ENM or noise monitoring system are
also available.

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Compliance with Standards
Specifications – Noise Monitoring Terminal Plus Type 3639-E and Noise Monitoring Terminal Advanced
Type 3639-G
Specifications apply to all configurations unless otherwise stated
STANDARDS
Conforms with the following National and International Sound Level
Meter Standards:
•IEC 61672-1 (2002-05) Class 1
•IEC 60651 (1979) plus Amendment 1 (1993-02) and Amendment 2
(2000-10), Type 1
•IEC 60804 (2000-10), Type 1
•DIN 45657 (1997-07)
•IEC 61260 (1995) Octave and 1/3-octave Bands Class 1
•ANSI S1.4 – 1983 plus ANSI S1.4A-1985 Amendment, Type 1
•ANSI S1.43 – 1997, Type 1
Conforms with the following National and International Filter
Standards:
•IEC 61260 (1995-07) plus Amendment 1 (2001-09), 1/3-octave
Bands, Class 0
•ANSI S1.11-1986, 1/3-octave Bands, Order 3, Type 0-C
•ANSI S1.11-2004, 1/3-octave Bands, Class 0
Note: The International IEC Standards are adopted as European
standards by CENELEC. When this happens, the letters IEC are replaced
with EN and the number is retained. Type 3639-G/3639-E also
conforms to these EN Standards
SELF-GENERATED NOISE LEVEL
Typical A-weighted values at 23 °C for nominal microphone sensitivity:
Type 3639-G (Microphone Type 4184)
Microphone: 24.6 dB
Electrical: 21.4 dB
Total : 26.3 dB
Type 3639-E (Microphone Type 4952)
Microphone: 14.1 dB
Electrical: 17.2 dB
Total : 18.9 dB
MEASURING RANGES (FOR SOUND LEVEL METER)
Dynamic Range: From typical noise floor to max. level for a 1 kHz pure
tone signal, A-weighted:
Type 3639-G (Microphone Type 4184), Range: 26.3 – 142.0 dB
Type 3639-E (Microphone Type 4952), Range: 18.9 – 134.0 dB
Linear Operating Range: In accordance with IEC 61672, A-weighted,
1kHz:
Type 3639-G (Microphone Type 4184), Range: 34.1 – 142.0 dB
Type 3639-E (Microphone Type 4952), Range: 29.8 – 134.0 dB
Peak C Range: In accordance with IEC 61672:
Type 3639-G (Microphone Type 4184), Range: 51.5 – 145.0 dB
Type 3639-E (Microphone Type 4952), Range: 47.4 – 132.3 dB
MEASURING RANGES (FOR FREQUENCY ANALYZER)
Linear Operating Range: In accordance with IEC 61260:
Type 3639-G (Microphone Type 4184), Range: ≤47.0 – 142.0 dB
Type 3639-E (Microphone Type 4952), Range: ≤48.3 – 129.3 dB
CORRECTION FILTERS
For Microphone Types 4184 and 4952, Type 3639-G/3639-E is able to
correct the frequency response to compensate for sound field (free-
field or diffuse-field) and for Type 4952 0 °(top) reference direction
and 90 °(side) reference direction
The CE marking is the manufacturer's declaration that the product meets the requirements of the applicable EU directives
RCM mark indicates compliance with applicable ACMA technical standards – that is, for telecommunications, radio
communications, EMC and EME
WEEE mark indicates compliance with the EU WEEE Directive
Safety EN/IEC 61010–1 and ANSI/UL 61010-1: Safety requirements for electrical equipment for measurement, control and
laboratory use.
EMC Emission EN/IEC 61000–6–3: Generic emission standard for residential, commercial and light industrial environments.
EN/IEC 61000–6–4: Generic emission standard for industrial environments.
CISPR 22: Radio disturbance characteristics of information technology equipment. Class B Limits.
EMC Immunity EN/IEC 61000–6–1: Generic standards – Immunity for residential, commercial and light industrial environments.
EN/IEC 61000–6–2: Generic standards – Immunity for industrial environments.
EN/IEC 61000–4–4: Fast transient/burst immunity. Level 2 (±1000 V)
EN/IEC 61000–4–5: Surge immunity. Line-to-line: Level 1 (±500 V). Line-to-ground: Level 3 (±2000 V)
Note: The above is guaranteed only:
If Noise Monitoring Terminal Plus Type 3639-E is correctly assembled according to the instructions given in the User Manual
When using accessories listed in this Product Data
Temperature IEC 60068–2–1 & IEC 60068–2–2: Environmental Testing. Cold and Dry Heat.
NMT Cabinet and Contents:
Operating Temperature: –10 to +50 °C (14 to 122 °F)
Operating Temperature with low-temperature protection kit: Down to –40 °C (–40 °F)
Storage Temperature: –25 to +70 °C (–13 to +158 °F)
Humidity IEC 60068–2–78: Damp Heat: 93% RH (non-condensing at 40 °C (104 °F)). Recovery time 2 to 4 hours
Mechanical Non-operating:
IEC 60068–2–6: Vibration: 0.3 mm, 20 m/s2, 10 – 500 Hz
IEC 60068–2–27: Shock: 500 m/s2
IEC 60068–2–29: Bump: 1000 bumps at 250 m/s2
Enclosure IEC 60529: Protection provided by enclosures: IP 55 (without external cables); IP 44 (with external cables)

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MEASUREMENTS
Broadband Values:
X = frequency weightings A and C, or A and Linear, or C and Linear (two
weightings simultaneously)
Y = time weightings Fast, Slow and Impulse (all simultaneously)
Spectrum Values*:
X = frequency weightings A, C or Linear
Y = time weightings Fast and Slow (two weightings simultaneously)
Equivalent Continuous Level (Leq): ‘I’-weighted value also selectable
(LAIeq)
1/3-octave Frequency Range*:12.5 Hz–20 kHz
EVENTS*
Settings: Hourly, user-defined on the following parameters:
Detection: Separate event start/stop triggers
Event Start Trigger: Leq or SPL with minimum threshold exceedance
duration
Event Stop Trigger: Leq or SPL with minimum threshold exceedance
duration
Sound Recording: Maximum duration, MP3 or WAV format
DATA
Data: Logging rate: ½ or 1 s
Parameters: SPL and Leq, 1/3-octave spectrum, PNL and PNLT values
BASIC STATISTICAL ANALYSES
Hourly Reports: Statistical information including Total Leq, Distribution
Short Reports: User-defined period of 1 to 60 minutes. Minimum
values, maximum values, Leq, 5 user-defined LNvalues. Sound
recording (Maximum duration, MP3 or WAV format, max. 20% of
monitoring time)
ADVANCED STATISTICAL ANALYSES
Hourly Reports: Total Leq,Background Leq, Noise Event Leq
PN dB (Perceived Noise Level) and EPN dB (Effective Perceived Noise
Level) of all events according to ICAO Annex 16
OTHER DATA
Calibration Reports: CIC system calibration checks up to four times a
day
Weather (Requires Optional Weather Station MM-0256):
Wind speed, wind direction, temperature, relative humidity, liquid
precipitation
Weather (Requires Optional Weather Station MM-0316):
Wind speed, wind direction
GPS (Requires Optional GPS Receiver/Antenna ZZ-0249): Latitude,
longitude, altitude
MEMORY CAPACITY
The capacity of the database is dependent on the size of the hard disk.
Standard configuration consists of a 40 GB hard disk giving at least six
months storage space (90 days for Type 3639-E/G-200 series)
Retention Time: User-defined
INTERFACE
Configuration dependent (see Tables 1 and 2)
LAN, GPRS: Type 3639-E/G-200 series NMT Plus/Advanced for ENMS
RS–232 Interface: using commercially available PSTN or GSM
Modems: Type 3639-E/G NMT Plus/Advanced, Type 3639-E/G-000
series NMT Plus/Advanced, Type 3639-E/G-300 series NMT Plus/
Advanced for System Integrators
WATCHDOG FUNCTION
Ensures automatic restart of the NMT after failure/power loss
CONTROL SOFTWARE
Configuration dependent (see Table 1 and Table 2)
Environmental Noise Management Software Type 7843:
Type 3639-E/G-200 series NMT Plus/Advanced for ENMS or ANOMS
ANOMS Noise Monitoring Software:
Type 3639-E/G-200 series NMT Plus/Advanced for ENMS or ANOMS
Noise Monitoring Software Type 7802:
Type 3639-E/G-000 series NMT Plus/Advanced
Prepared for Other Software:
Type 3639-E/G-300 series NMT Plus/Advanced for System Integrators
SOUND POWER LEVEL
<36 dB(A) Lw
DIMENSIONS AND WEIGHTS
Weatherproof Cabinet:
•Height: 829.2 mm (32.65″)
•Width: 397.4 mm (15.65″)
•Depth: 200.9 mm (7.91″)
•Weight: 22.4 kg (49.3 lb) for NMT with one battery, 28.9 kg (63.7 lb)
with two batteries
•Mounting Kit: 7.5 kg (16.5 lb)
POWER REQUIREMENTS
Voltage: 110/220/240 V AC
Frequency: 47.5 – 66.0 Hz
Operates on external DC voltages between 12 – 24 V using the included
External Aux. DC Cable AO-0649
Power: Heating option kit for NMT 3639 WU-0682 power consumption
is 30 W per compartment
(60 W total)
Batteries: 1 × QB-0065 @ 12 V included, Max. 2
Typical Operating Time: 14 hours per battery, 24 hours with two
batteries (charged when external AC or DC over 16 V applied)
LXeq LXpeak LXim
LXYinst LXYmax/SPL LXYmin
* For Type 3639-E-200 series configurations, this requires a license for Event
Analysis Software BZ-7844 to be installed from ENM Software Type 7843.
LXYinst LXYmax LXYmin
LXeq