PRODUCT DATABK Connect Acoustic Camera Type 9712-W-FENBK Connect® Acoustic Camera together with BK Connect software
is a portable turnkey solution for real-time noise source
identification (NSI) that can be used for both stationary and nonstationary measurements. It is a versatile tool well-suited for use
in many different industrial environments with applications that
include buzz, squeak, and rattle (BSR) detection in vehicle cabins,
troubleshooting in aircraft and testing of household appliancessuch as washing machines.
Use the BK Connect Acoustic Camera with BK Connect software tolocate and view transient sound sources on-site or make and saverecordings for later analysis.

Uses, Benefits and Features
Uses• NSI on industrial machinery and household appliances• Detection and documentation of BSR in vehicle cabins• Leak detection on weather seals, firewalls and cladding• Event measurement and recording• Non-stationary measurements: Hand-held• Stationary measurements: Mount the array on a tripod
Benefits• Complete system solution• View measurements on-site in real time
• Locate transient sound sources and capture audio and visual
recordings of the problem area
• Adjust the frequency range during and after recording• Perform both beamforming and acoustic holographymeasurements with one system• Capture screen as picture or video for rapid reporting

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Hardware Features – Acoustic Camera• Small-sized array that can fit in confined spaces ( 35 cm)• Removable reflective plate – allows measurements in either
the near or far acoustic field• Microphones flush with reflective plate• Integrated video camera – films 15 to 20 frames per second• Integral cables – keep system tidy, mobile, and easy to set up• Built-in tablet holder• Front-end battery life of up to 2½ hours• Portable with a custom-made case
Software Features – BK Connect• Sound pressure, sound intensity, particle velocity and soundpower calculations• Source map superimposed on video images• Spectrogram displaying level and frequency as a function of time
• RPM profile plots from tacho or CAN bus signals• Up-and-running in under ten seconds (from project launch)• Continuous buffering providing real-time images• Simple, easy-to-use interface• Tablet mode for portable measurements• With BK Connect Array Analysis Type 8430: Transfer recordings
to PULSE™ NSI Array Acoustics Post-processing suite

Product Data BP 2534 – 20

System Overview
Hardware
The system hardware consists of:• A hand-held array with a detachable carbon-fibre reflective
backplate• LAN-XI data acquisition hardware• A custom-made, waterproof carrying caseFig. 1 Acoustic Camera Type 9712-W-FEN in its carrying case

Software
The BK Connect software is the heart of the system, controllingthe hardware and enabling streaming, recording, measurement,
playback, analysis and processing of data.
The system software consists of one of the following:• BK Connect Array Analysis Type 8430 (standard solution withfull functionality)• BK Connect Acoustic Camera Applet Type 8493-A-N-SYS(measurement and playback only)

The BK Connect Acoustic Camera System
Fig. 2 BK Connect Acoustic Camera System9712-W-FEN Acousc Camera
in WA-0313 Equipment Carrying Case

TabletWindows, iOS
or Android(not supplied)

LAN-XI:
1 × 3660-C-100 Frame
1 × 2831 Baery
1 × 3050-A-060 Module with
UA-2112-060 Front Panel
2 × 3053-B-120 Module with
UA-2112-120 Front PanelUSB

8493-A-N-SYS Acousc Camera Applet

Mic.
Cables(bundled)

WA-1764-W-001
Array

CameraUSB Cable

BK Connect® Soware:
8430
Array Analysis
8400
Data Viewer
8401
Hardware Setup
8401-A Hardware Setup (advanced)
or

LAN
Cable

WA-0728-W-006
Calibraon Adaptor
Laptop running BK Connect soware(not supplied)

170155/5

System Hardware – Acoustic Camera Type 9712-W-FEN
The Hand-held Array
The Acoustic Camera Type 9712-W-FEN includes the Array
WA-1764-W-001 (30-channel, sliced wheel array with irregularmicrophone placement), integral cables and a detachable
reflective plate. It features an integrated handle with a built-in
tablet holder (recommended tablet size 20 × 13 cm (8 × 5 in)). In
the centre of the array is a video camera that films 15 to 20
frames per second.

TEDS. It has a frequency range of 50 Hz to 20 kHz and a built-in
CCLD* preamplifier. See product data BP 2202 for more
information.
The integral cables connect the array microphones to the LAN-XI
data acquisition hardware and the array camera to the computer.
A single cable bundle consisting of five microphone cables boundtogether, keep the system tidy. The connectors are numbered tomake connection to the LAN-XI hardware quick and easy.

The microphone type used on the array is Short 20 kHz Array
Microphone Type 4959; a ¼ prepolarized microphone with* CCLD: Constant current line drive, also known as DeltaTron® (ICP and IEPE compatible).

2

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The array is optimized for both acoustic holography andbeamforming measurements, with a patented numerical method
to optimize performance for the frequency range and number ofmicrophones. See Fig. 3 for the dynamic range, or maximum side
lobe (MSL) level, of the array. For more information consult
technical review, BV 0056.

Fig. 3 Maximum side lobe (MSL) level of WA-1764-W-001

0–3MSL [dB]

–6
–9
–12
–15

–21
0

2

4

6

8
10 12
Frequency [kHz]

14

16

18

20

160235/2–18

The detachable reflective plate is made of a hard, vibrationdamped material. With the reflective plate in place, the array issuitable for measurements in the far field using the
beamforming algorithm (Fig. 4, left). Without the reflective plate,measurements can be made using statistically optimised nearfield acoustic holography (SONAH) Fig. 4, right. As acomparison, a typical measuring distance for beamforming isaround 40 cm, while a typical measuring distance for acoustic
holography is around 5 cm.

Fig. 4 Left: Array WA-1764-W-001 with reflective plate for use in beamforming measurements; Right: Without reflective plate for use inacoustic holography measurements

NOTE: When using the hand-held array without the reflective plate (as for acoustic holography measurements) noise will reflect off of the tablet.
Remove the tablet from the holder to prevent the detection of such sounds.

LAN-XI Data Acquisition Hardware
Type 9712-W-FEN includes all the necessary LAN-XI hardware:• 1 × Front-end Frame with GPS Type 3660-C-100 (5-module)• 2 × 12-ch. Input Module Type 3053-B-120-R with Array
Connector Front Panel UA-2112-120• 1 × 6-ch. Input Module Type 3050-A-060-R with Array
Connector Front Panel UA-2112-060• 1 × Battery Module Type 2831*

Information regarding the LAN-XI components can be found in
product data BP 2215, which describes the LAN-XI frame andmodules, and BP 2421, which describes the interchangeable
LAN-XI front panels.

System Software – BK Connect
Licencing Options
Depending on your measurement needs, there are two different
software licensing options for the Acoustic Camera. For thoserequiring access to the full suite of features and functionality, asolution based on BK Connect Array Analysis Type 8430 isrecommended. For those who want to use the Acoustic Camera
as a stand-alone troubleshooting tool, then BK Connect Acoustic
Camera Applet Type 8493-A-N-SYS should be sufficient.
Standard Software Based on BK Connect Array Analysis
To set up the hardware, control measurements, and stream, playback and record data with the Acoustic Camera, the following
standard software configuration is needed:• BK Connect Array Analysis Type 8430
• BK Connect Data Viewer Type 8400
• BK Connect Hardware Setup Type 8401
• BK Connect Hardware Setup (advanced) Type 8401-A

The licences can be either node-locked (locked to a PC host or
dongle), or floating (locked to a network server).
For those who simply want to view and analyse recorded data inan Acoustic Camera project, only Types 8430 and 8400 licences
are required.
A system based on Type 8430 allows for modular use, meaning
the application can be used with other BK Connect applications,where relevant. The software can be upgraded as well.

* Type 2831 powers the hardware for up to 2½ hours. The battery-life indicator on this module is always visible.

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Fig. 5 Interface of BK Connect Array Analysis Type 8430, showing the acoustic map, spectrogram and sound power

Targeted Solution: BK Connect Acoustic Camera Applet
Type 8493-A-N-SYS
An alternative licencing option for users with well-definedmeasuring and recording requirements is the BK Connect
Acoustic Camera Applet Type 8493-A-N-SYS. Applets are perfectfor single users where a full BK Connect licence is not needed.
The applet offers users the same streaming, recording andplayback functionality as the standard solution above with thefollowing limitations:• No auto-detection of hardware• Self-contained, node-locked licence (no software prerequisites
or sharing with other BK Connect modules)• No post-processing (no transfer to PULSE NSI Array
Acoustics Post-processing suite)• No advanced functionality or options such as wind speed
corrections
Software Modes
Streaming Mode
In Streaming mode, continuous buffering enables streaming ofimages to create an acoustic map for real-time troubleshootingof problem areas, allowing you to evaluate noise emissions. The
acoustic map is based on the algorithm selected by you, either
the beamforming algorithm or statistically optimised nearfield
acoustic holography (SONAH).

The displays are optimised for both PC and tablet screens.
Playback Mode
Should an area be identified that requires closer investigation,
data can be recorded and analysed later in Playback mode.
Recordings are automatically stored in the software's Project
Browser where they can be reviewed and the frequency range
settings adjusted, if necessary. If a recording is made together
with a tacho signal, then order mapping can be shown with 1 to
100 contiguous orders. The displays available in Streaming
mode are also available in Playback mode.

Post-processing Data from Type 8430
If your data requires advanced analysis, you can of course
import the recording into other BK Connect applications.
Post-processing can also be handled in the PULSE LabShopbased environment, if you have a valid PULSE NSI Array
Acoustics Post-processing licence, such as Spherical
Beamforming Type 8606, Acoustic Holography Type 8607 or
Beamforming Type 8608. Data transfer to the Array Acoustics
database is built into the BK Connect Array Analysis userinterface, allowing you to use your Acoustic Camera data in
specialised applications such as wind tunnel measurements
using multiple arrays.

The acoustic map displays sound pressure, sound intensity or
particle velocity* superimposed on an image of themeasurement object. Frequency spectra of the measurement
parameters can be shown in 2D displays for selected meshpoints in the acoustic map. The total sound power calculations
for the area covered by all mesh points can also be shown in the
2D displays. There is a clear readout of the total sound power
covering the full frequency range and the frequency limited
sound power covering a user-defined frequency range.
An spectrogram of sound pressure, sound intensity or particle
velocity* is also shown for information on time, level andfrequency. If a tacho signal has been acquired from a tachoprobe or CAN bus, an rpm profile can be shown together withthe spectrogram.
* Available using SONAH.

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BK Connect Array Analysis with Other Supported Arrays
BK Connect Array Analysis Type 8430 can be used with other
Brüel & Kjær sliced wheel arrays (see Table 1) and all otherplanar, irregular arrays and regular grid arrays. Type 8430 does
Table 1

not work with double-layer or half-wheel arrays. For multi-armed,
foldable arrays (such as the pentangular array), only
beamforming is supported.

Beamforming and holography are supported with sliced wheel arrays. Frequency range is for an MSL level of at least 7 dB

ITEM NUMBER

NUMBER OF MECHANICALCHANNELS/DIAMETERMICROPHONES(M)

WA-1558-W-003

60

0.55

ARRAY
DIAMETER(M)

AVERAGEMICROPHONESPACING(M)

FREQUENCY
RANGE
(HZ)

RESOLUTION
AT OPTIMALDISTANCE(M)

LOWEST
FREQUENCY
(HZ)

0.49

0.056

85 to 19 k

0.07 to 0.015

88WA-1558-W-004

36

0.70

0.67

0.099

60 to 6.6 k

0.12 to 0.04564WA-1558-W-006

60

1.05

0.96

0.110

40 to 10 k

0.13 to 0.03

45

WA-1558-W-010

60

0.75

0.73

0.084

55 to 14 k

0.09 to 0.02

59

WA-1558-W-017

36

1.22

1.15

0.170

35 to 3.8 k

0.20 to 0.08

37

WA-1558-W-020

36

0.55

0.45

0.066

95 to 8.4 k

0.08 to 0.035

95

WA-1558-W-022

84

1.05

0.95

0.092

40 to 20 k

0.11 to 0.015

45WA-1558-W-025

42

0.40

0.36

0.049

115 to 12 k

0.06 to 0.025

119WA-1558-W-026

18

1.00

0.98

0.205

40 to 2.3 k

0.22 to 0.135

44WA-1764-W-001

30

0.35

0.30

0.049

140 to 12 k

0.06 to 0.025

143

Microphone Verification
Microphone verification can be performed prior to ameasurement task. Use either Pistonphone Type 4228 or Sound
Calibrator Type 4231 fitted with adaptor WA-0728-W-006 forverifying a single quarter-inch microphone. This adaptor is
included in Type 9712-W-FEN as standard.
If needed, factory standard calibration at HBK is available for thearray microphones.

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5Compliance with Standards
ARRAY WA-1764-W-001
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
China RoHS mark indicates compliance with administrative measures on the control of pollution caused by electronic
information products according to the Ministry of Information Industries of the People’s Republic of China
WEEE mark indicates compliance with the EU WEEE Directive
SafetyEN/IEC 61010–1: Safety requirements for electrical equipment for measurement, control and laboratory use
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 32: Radio disturbance characteristics of information technology equipment. Class B Limits
FCC Rules, Part 15: Complies with the limits for a Class B digital device
This ISM device complies with Canadian ICES–001 (standard for interference-causing equipment)

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 61326: Electrical equipment for measurement, control and laboratory use – EMC requirements
NOTE: The above is only guaranteed using accessories listed in this document

Temperature

IEC 60068–2–1 & IEC 60068–2–2: Environmental Testing. Cold and Dry Heat
Operating Temperature: –10 to +55 °C (14 to 131 °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))

MechanicalNon-operating:
IEC 60068–2–6: Vibration: 0.3 mm, 20 m/s2, 10 – 500 Hz
IEC 60068–2–27: Shock: 1000 m/s2
IEC 60068–2–29: Bump: 1000 bumps at 250 m/s2

LAN-XI DATA ACQUISITION HARDWARE
See product data BP 2215

Specifications – BK Connect Acoustic Camera
Acoustic Camera Type 9712-W-FEN
ARRAY WA-1764-W-001*
Frequency Range: 140 Hz to 12 kHz• Near field, without reflective plate (SONAH): 140 Hz to 3 kHz• Far field, with reflective plate (beamforming): 1 kHz to 12 kHz†
Weight: 1 kg (2.2 lb)
Diameter: 35 cm (13.8 in)
Number of Microphones: 30
Video Camera:• Frame rate: 15 – 20 per second• Pixels: 1280 × 1024
• Angle of view (diagonal): 76°
WATERPROOF CARRYING CASE
Dimensions: 60 × 34 × 64 cm (24.6 × 13.4 × 25.2 in)Weight (hardware and case): 22 kg (48.5 lb)
FRONT END
Specifications for LAN-XI data acquisition hardware used in
BK Connect Acoustic Camera are given in product data BP 2215

BK Connect Array Analysis Type 8430 or
BK Connect Acoustic Camera Type 8493-A-N-SYS
Specifications valid from BK Connect 2023.0
MEASUREMENTS
Analysis (Narrow band): 1/1-, 1/3-, 1/12-octave
Acoustical Weighting: Linear, A, C
Time Constant (Exponential): 1/8 s (fast), 1 s (slow), 8 s* Specifications for MSL of at least 7 dB
† Frequency range can be extended up to 20 kHz, with reduced MSL

6

SYSTEM REQUIREMENTS• Windows® 10 or 11 Pro or Enterprise (x64) with either Current Branch(CB), Current Branch for Business (CBB), Semi-annual Channel(Targeted) or Semi-annual Channel servicing model• Microsoft® Office that includes Microsoft Access®. This can be Office2019 or 2021 (x32 or x64) or Microsoft 365® Desktop version (x32 orx64)• Microsoft® SQL Server® 2019 or 2022 (SQL Server 2022 Express
included with software)
RECOMMENDED SYSTEM CONFIGURATION• Intel® Core™ i9, 3 GHz processor or better• 32 GB RAM• 1 TB Solid State Drive (SSD) with 100 GB free space, or better• 1 Gbit Ethernet network‡• Microsoft® Windows® 10 Pro or Enterprise (x64) with CB• Microsoft® Office 2021
• Microsoft® SQL Server® 2022
• Screen resolution of 1920 × 1080 pixels (full HD)

TABLET REQUIREMENTS
Operating System: Windows®, iOS®, or Android™
Recommended Size: 20 × 13 cm (8 × 5 in)
REMOTE CONTROL/DISPLAY REQUIREMENTSTeamViewer or similar‡ A dedicated data acquisition network (LAN or WAN) is recommended. A networkthat only handles data from the front end improves the stability of the data

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Ordering Information
BK Connect Acoustic Camera

Supported HBK Products

HARDWARE
Type 9712-W-FEN
Acoustic Camera
Including:• WA-1764-W-001: 30-ch. Hand-held Array– 1 × Array Frame with handle, integral cable and tablet stand– 1 × Video Camera– 30 × Type 4959: Short 20 kHz Array Microphone– 1 × UA-4139: 350 mm Reflective Plate with black polyurethane
foam windscreen layer– 1 × WE-0313: Storm Case
– 1 × WL-3654-D-050: USB 2.0 cable, 5 m (16.4 ft)– 1 × WA-0728-W-006: Type 4228/4231 Calibrator Hose-fitted
Adaptor for verification of single ¼ microphone

HARDWARE
UA-4139• LAN-XI Data Acquisition System– 1 × Type 3660-C-100: 5-module Front-end Frame with GPS– 1 × Type 3050-A-060: 6-ch. Input Module 51.2 kHz (Mic, CCLD, V),
excluding accessories– 2 × Type 3053-B-120: 12-ch. Input Module 25.6 kHz (CCLD, V),
excluding accessories– 1 × UA-2112-060: Detachable Front Panel, 6-ch. mic. array,1 × circular 7-pin (F) connector– 2 × UA-2112-120: Detachable Front Panel, 12-ch. mic. array,2 × circular 7-pin (F) connectors– 1 × Type 2831: Battery Module, excluding accessories
SOFTWARE
Type 8430-X*
orType 8493-A-N-SYS

UA-0750
Type 4228
Type 4231
WA-0728-W-003
WA-0728-W-006

350 mm Reflective Plate, with black polyurethane
foam windscreen layer
Tripod with ball head, 40 to 131 cm(15.7 to 51.6 in)
Pistonphone
Sound Calibrator
Type 4228 Calibrator Hose-fitted Adaptor for
simultaneous verification of six ¼ microphones
Type 4228/4231 Calibrator Hose-fitted Adaptor
for verification of single ¼ microphone

Calibration Services
ANA-LNXI-CAF
Accredited Calibration of LAN-XI Modules
WA-1764-W-001-TCF Conformance Test including calibration and
TEDS update of the 30 array microphones, Short
20 kHz Array Microphone Type 4959, plus
verification of the assembled 30-ch. Hand-held
Array WA-1764-W-001

Custom Options
Custom arrays are ordered through the Customized Projects
Department or Project Sales Office†.
Individual components of the BK Connect Acoustic Camera can bepurchased as needed

BK Connect Array Analysis
BK Connect Acoustic Camera Applet(node-locked)

Required Software
With BK Connect Array Analysis Type 8430:
Type 8400-X*
BK Connect Data Viewer
Type 8401-X*
BK Connect Hardware Setup
Type 8401-A-X*
BK Connect Hardware Setup (advanced)
M1-8430-X*
Software Maintenance and Support Agreement
for Type 8430
M1-8400-X*
Software Maintenance and Support Agreement
for Type 8400
M1-8401-X*
Software Maintenance and Support Agreement
for Type 8401
M1-8401-A-X*
Software Maintenance and Support Agreement
for Type 8401-A
With BK Connect Acoustic Camera Applet Type 8493-A-N-SYS:
M1-8493-A-N-SYS
Software Maintenance and Support Agreement
for Type 8493-A-N-SYS
NOTE: Applets cannot be upgraded to full-version applications or added
to other applets and modules

Post-processing Software
Type 8606-X*
Type 8607-X*
Type 8608-X*
M1-8606-X*
M1-8607-X*
M1-8608-X**

PULSE Array Acoustics, Spherical Beamforming
PULSE Array Acoustics, Acoustic Holography
PULSE Array Acoustics, Beamforming
Software Maintenance and Support Agreement
for Type 8606
Software Maintenance and Support Agreement
for Type 8607
Software Maintenance and Support Agreement
for Type 8608

‘X’ indicates the licence module, either: node locked (N) or floating (F)www.hbkworld.com† Contact information for local HBK offices can be found at www.hbkworld.com

7© Hottinger Brüel&Kjær A/S. All rights reserved.
2023-09
BP 2534 – 20
hbkworld.com · info@hbkworld.com
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accuracy, currency or completeness, nor is it intended to form
the basis of any contract. Content is subject to change without
notice – contact HBK for the latest version of this document.
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Brüel & Kjær A/S or a third-party company.