ACOUSTIC SUBSYSTEMS & COMPONENTS

We deliver solutions. We design to your spec. We have capacity for your need.

April 2021

© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
E-mail: sales@misago.co.jp
http://www.misago.co.jp

“Optimizing underwater acoustics since 1994, GeoSpectrum has decades ofexperience in the design and manufacturing of hydrophones and transducers.
Often imitated, never duplicated”

NATO security classification

ISO: 9001 certified

ITAR free systems

Based in Dartmouth NS – “Atlantic Canada”
Optimized’ cutting edge systems, subsystems & components for underwater acoustics.
Surveillance and monitoring & communication systems & solutions.
Defense, commercial & scientific markets.
Part of Elbit systems LTD© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

2

We provide underwater acoustic sensing and communication
solutions for diverse applications.

DEFENCE

SECURITY

ENVIRONMENTAL
MONITORINGSCIENCE/R&D

OCEANOGRAPHY/HYDROGRAPHY

ENERGYFISHERIESHIGH PERFORMANCE | RELIABLE | COST-EFFECTIVE© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

3Acoustic subsystems & components
HYDROPHONES

Sold in dozens ofcountries in allcontinents

VECTOR SENSORSACOUSTIC ARRAYSSOUND SOURCESLOW FREQUENCY SOURCES

Delivering to world
leading underwater
science institutes

Transducer SME
supportVery high rate of repeat
orders> 100 customers

Full-service
commitment© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

4Hydrophones▪ Pre-amplified hydrophones▪ Selectable signaling, gain, and band passfilters (on order)▪ Hydrophone packaging customization forrequired application▪ Auxiliary equipment (case, cables,connecters, etc).
▪ Un-preamplified streamer hydrophones▪ 1000/day capacity© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

5Hydrophones (cont’d)
M36

Wide-band omni-directional hydrophone for marine observation. Preamplified output of 0 to 35 dB (selectable on order) with single ended
voltage, current, or differential signaling

ModelNumber

Unamplified
Sensitivity(dB re V/µPa)

Max Depth(m)Max
Frequency(Hz)ElementCapacitance
(nF)

M5

medium frequency hydrophone for streamers. Low cost when produced inhigh volume.

M5-360-195

1700

20000

2M5-900-195

900

20000

2

M14-360

-200

3500

20000

5

M14-900-200

900

20000

8

M15-360-190

1700

15000

1

M15-900-190

900

15000

1M36-100-200

2500

2500001.5

M36-900-200

900

250000

1.5

M14

M15

Electrical & size equivalent of the Benthos AQ2000®. Its primary use is forvery deep bottom cables.
High sensitivity, medium frequency hydrophone for streamers. Low costwhen produced in high volume© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

6Directional sensors & unattended data collection systems▪ Wide frequency band single sensor directional
sensing including low frequencies▪ Pressure and accelerometer based directional
sensors▪ DIFAR, particles motion/velocity▪ Measure 2 & 3-D particle motion & pressure
in a broad range of environments▪ Can be deployed for long term unattended
detection & recording of passive detection
including bearing & signature data
▪ Acoustic surveillance, ocean environmental
monitoring, offshore oil and gas monitoring
mammal detection, air-gun characterization

Current or differential signaling gain andsensitivity optimized to user's requirements© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

7Directional sensors & unattended data collection systems (cont’d)SensorDirectivity

Compass

Frequency
Range

Depth Rating

Output signaling

Weight inair

Weight inwater

Dimensions

Particle Motion Sensor
M20-04030N

1 Hz – 3 kHz

300 m

Current

54 mm diam.,
179 mm lengthM20-105

30

Y

1 Hz – 3 kHz

1000 mDifferential voltage

M20-601

20Y

1 Hz – 3 kHz

1000 mCurrent, single
ended voltage,differential voltage

107 mm diam.,
120 mm length20

N

100 Hz – 15kHz

1000 mDifferential voltage
or SE current-loop

127 mm diam.,
157 mm length

3.4kg

1.0kg

127 mm diam.,
155 mm length

Directional Sensor
M35-300© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

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Towable M20-601 (M518)▪ Noise-cancelling directional Hydrophone▪ Low drag▪ Tow depth 100 m▪ On-board processing
generates alerts▪ Phone home via comms link
▪ Months of persistence© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

9Sounds sources - overview▪ FFRs, Spheres, and Benders▪ Tonpilz with built-in tuning for active/passive operation forHMS▪ Packaging can be customized for desired application(transducer stack)▪ Applicable for active sonar transmissions and underwatercommunications▪ Optional auxiliary equipment such as power amplifier,cable, etc.

© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

10Free Flooded Ring (FFR) Transducers▪ Ideal for unlimited depth and high-power applications▪ Very suitable for broad band low frequency soundsources.
▪ Frequency range from 530 Hz to 20 kHz▪ Toridal or hemispheric beam pattern▪ Individual rings or built as array tailored to meetfrequency & power requirements▪ Radially poled and circumferentially poled(segmented) FFRs
▪ For active sonar transmission, sonar target sourceand communication applications▪ FFRs can be customized to customer specifications© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp11

Free Flooded Ring (FFR) Transducers (cont’d)
Booted FFR Transducers
Model numberResonancefrequency

TVR atresonanceM27-450

4.2 kHz

Maximum SPL
at resonanceDiameter / max
section width

HeightBeam pattern

138 ±1.5 dB re 1 Unlimited
μPa/V @ 1 m

207 dB re 1 μPa@ 1m

18.4 cm

16.1 cm

Toroidal

3.1 kHz137 ±1.5 dB re 1 Unlimited
μPa/V @ 1 m

193 dB re 1 μPa@ 1m

20.8 cm

20.8 cm

ToroidalM27-850 Booted FFR transducer

1850 Hz138 ±1.5 dB re 1 Unlimited
μPa/V @ 1 m

204 dB re 1 μPa
@ 1m

25 cm

24 cm

ToroidalM27-890 Booted FFR transducer

975 Hz135 dB re 1μPa/V @ 1 m

201 dB re 1 μPa
@ 1m

32 cm

53 cm

ToroidalBooted FFR transducer
M27-650 Booted FFR
transducer

Operating &survival depth

Unlimited© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

12Free Flooded Ring (FFR) Transducers (cont’d)
FFR Transducers for communication systems
Model number

Resonance
frequency

TVR atresonanceOperating &survival depth

Maximum SPLat resonanceDiameter / max
section widthHeight

Beam pattern

M27-930

7 - 17 kHz> 130 dB re 1μPa/V @ 1 m

Unlimited> 200 dB re 1μPa @ 1m

10.8 cm

9.1 cmHemisphericalM27-931

7 - 17 kHz> 130 dB re 1μPa/V @ 1 m

Up to 6000 m
dependant onmounting
configuration

192 dB re 1 μPa@ 1m

10.8 cm

8 cm

HemisphericalM27-9428 - 16 Hz> 130 dB re 1μPa/V @ 1 m

Up to 6000 m
dependant onmounting
configuration
and base platematerial

192 dB re 1 μPa@ 1m

10.8 cm

8 cm

Hemispherical© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

13Spherical transducers
M18 Spherical Transducers▪ Suitable for active/passive sonar, marine
mammal detection (MMD), acoustic datatransmission, and subsea communication▪ Omnidirectional with high depth rating andbandwidth▪ Low Q resonance▪ Can be used as both a projector and areceiver.
▪ Variety of sizes▪ Smaller M18s are perfect as broadband,
high-frequency hydrophones.
© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp14Spherical transducers (cont’d)Model
NumberOD (cm)Resonance
Frequency(Hz)TVR @OCV @1 kHz Max Depth
Resonance(dB re(m)(dB re µPa/V V/µPa)@ 1m)

Weight (kg)Capacitance(nF)

M18C-1.0

2.9

68000

148-198.5

2500

0.1

10.2

M18C-1.5

4.4

47000

148-195.0

2500

0.1

23.5

M18C-2.5

6.7

27000

148-190.0

2500

0.5

42.5

M18C-4.0

10.8

16500

148-186.5

2500

1.4

57.3

M18C-6.0

15.7

12000

148-185.0

2500

4.8

80

© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

15

Benders▪ Family of highly customizable flexural disc projectors(benders) projectors.
▪ Produce moderate power over a broad band or highpower near resonance.
▪ Omnidirectional response▪ Can be stacked into arrays, lowering their resonant
frequency and increasing their source level forincreased directivity.
▪ Can be used for a variety of different low-frequency
applications, including but not limited to subsea
communication, long range data transmission andactive sonar▪ Can be tailored to suit each customer’s uniquerequirements.

© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp16

Sounds sources – bender specifications
Model #Resonance Freq (Hz)TVR @ resonance(dB re 1 µ Pa/V @ 1m)

Max depth (m)OD (cm)Weight (Kg)

Thickness (cm)M21-254-400

400

13880

26.4

5

3.8

M21-203-500

500

13880

21.3

3.2

3.2

M21-203-600

600

138110

21.3

3.3

3.4

M21-203-700

700

138130

21.3

3.4

3.6

M21-254-800

800

138210

26.4

8.3

4.8

M21-203-900

900138190

21.3

3.8

3.9

M21-203-1000

1000

138

200

21.3

4.0

4.0

M21-203-1200

1200

138

290

21.3

4.3

4.3

M21-203-1400

1400

138

400

21.3

4.6

4.6

M21-203-1600

1600

138490

21.3

5.0

4.9

M21-203-2000

2000

138

270

11.0

0.8

2.6

M21-203-2500

2500

138

400

11.0

0.8

3.0

M21-100-3000

3000

138

540

11.0

0.8

3.2

M21-100-3500

3500

138660

11.0

0.9

3.4

M21-100-4000

4000

138840

11.0

1.0

4.0

M21-100-5000

5000

138

1200

11.0

1.2

4.5

© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

17Tonpilz transducers▪ Highly directional transducers with a conical beam pattern▪ Can be used as transmitters and receivers▪ Built-in tuning for active/passive operation▪ Can be packaged in staves for Hull Mounted (HMS) & bow sonars
ModelResonanceFrequency (Hz)TVR @Resonance (dBre μPa/V @ 1 m)

Max Depth (m)Length (cm)Weight (kg)M33-300 series

6500

151up to 6000 m

19.53.5© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary18

Acoustic arrays▪ Towed and moored (sea-bottom or vertical line – VLA) arrays▪ Can include hydrophones and/or sound sources▪ Can be configured for▪ Digital or analog outputs▪ Autonomous or wired operation▪ Can include omni-directional, 2-axis or 3 axis directional
sensors▪ Hosed or potted.
▪ Applications include▪ Submarine, torpedo and ship detection▪ Area and harbor surveillance▪ Marine mammal detection▪ Noise measurement ranges▪ Low drag arrays for UUVs and low power USVs
▪ Turn-key solutions designed to customers specifications orrequirements© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

19C-BASS Very-low frequency (VLF) sound source▪ Patented, disruptive technology family of VLF sources▪ Unprecedented SPL for form factor▪ Significantly lower price▪ Rugged design is intended for continuous use▪ Versatile turn-key deployment & mounting solutions▪ Pressure compensated for desirable depths▪ Can be used individually, or in arrays to produce higher powersystems with or without directivity▪ 8.5” to 46” diameters▪ 15 to 300 Hz resonance▪ Applications include (but not limited too) – long range
communications, target simulation, acoustic health monitoring &activation, and more
© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

20

C-BASS (cont’d)
100% reliability in year long deployment under Arctic ice.
Exhibited communication range of 2500 km in international research trial.

© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

21

C-BASS (cont’d)
SIZE COMPARISON OF LEGACY SYSTEM VS. C-BASS

Mikhalevsky’s 20 Hz, 195 dB source
demonstrated transmission ranges exceeding
2,000km in 1994 and 1998.

GTI 35 Hz, 195 dB source at Seneca Lake,2017 (1st generation)

TESTING AT GEOSPECTRUM

Shaking at 12-ton water tankNow 200 dB at 20 Hz.
© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

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C-BASS – Specifications
Model Number

Resonance
Frequency (HZ@ 20m depth)

Maximumsource level(dB re uPa @1m)

Max depth withoutpressurecompensation (m)Passive
Max depth
compensation
activemax depth options compensation(m)

Diameter(cm)Weight(kg)M72-2525

197

N/A

10>300118402

M72-30

30

199

N/A

10>300102355

M72-40

40

203

N/A

10>300118402

M72-50

50

166

N/A

20>50068

157

M72-110115

19030100; 200

1000

3424

M72-230

215

19530100; 200

1000

3424

M72-300

300

19050125; 250

1000

228© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Misago Co., Ltd.
http://www.misago.co.jp

23

Thank you

Please forward your questions/comments to:
Brittany Atwood
Commercial Sales Manager
Brittany.Atwood@geospectrum.ca
Misago Co., Ltd.
E-mail: sales@misago.co.jp
http://www.misago.co.jp

Melanie Brownrigg
Technical Sales Coordinator
Melanie.Brownrigg@geospectrum.ca© 2021 by GeoSpectrum Technologies Inc. | GTI Proprietary

Catherine Eddy
Office Administrator
Catherine.Eddy@geospectrum.ca