icListen combines hydrophone sensing, digitization, processing, recording and Ethernet streaming. The current full specification sheet distinguishes 200 kHz HF variants from 13 kHz AF variants, with different maximum sample rates. It lists 24-bit conversion and 1 TB storage, while the 2025/26 guide specifies software and firmware compatibility. Ocean Networks Canada documents scientific deployments and hardware-dependent orientation measurements. This supports environmental monitoring and instrument integration, without establishing tactical classification performance.
Technical detail
Core features
HF and AF variants with different bandwidth and sampling limits
24-bit conversion and 1 TB onboard recording
Ethernet streaming and synchronized-array integration
Lucy II and Marco compatibility tied to firmware version
Hardware
Hydrophone
Underwater Acoustics
Passive Sensing
24 Bit Sampling
Edge Processing
Ethernet
Acoustic Data
Use & integration
Recorded applications
Underwater acoustic awareness
Passive acoustic monitoring
Distributed hydrophone arrays
Networked passive-acoustic monitoring
Long-duration local recording and remote acoustic data access
These describe the reviewed application scope, not confirmed deployments, released requirements or procurement eligibility.
Evidence of maturity
Commercial hydrophones with observatory documentation. Current variants and historical hardware revisions differ; RB9 is marked discontinued on the downloaded sheet.
Commercial availability
Available as hydrophones and deployment configurations. Confirm exact sensor variant, firmware/software compatibility, calibration, power and storage before quoting endurance or network capability.
Integration and verification
Readiness
A technology readiness level is not established by the reviewed public sources.
This is a reviewed public-source assessment. It is not procurement eligibility, endorsement, customer interest, or classified demand.
Original sources 5 linked records
These records support this capability and its published Mission area and Defence need connections. A source count is not a count of independent confirmations.
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · defence applications
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · technical tags
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · defence applications
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · technical tags
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · technical tags
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · core features
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · defence applications
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · technical tags
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · technical tags
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · commercial availability
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · summary
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · technical tags
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · technology readiness level
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · technicaldomainslugs
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · defence applications
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · technical tags
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · defence applications
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · technical tags
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · name
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · maturity
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Capability · capability type
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Mission area · Underwater ISR
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Mission area · Underwater ISR
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Mission area · Underwater ISR
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
Supports: Mission area · Underwater ISR
The current icListen full specification sheet, visually inspected on page 2, distinguishes HF/HF(L)/HF(X2) 200 kHz bandwidth and 512 ksps from AF/AF(L) 13 kHz and 32 ksps. All list 24-bit conversion, Ethernet and 1 TB storage. Nominal eight-hour battery life is not a guaranteed deployment duration. RB9 is discontinued.
The icListen 2025/26 user guide specifies firmware 41.0 compatibility with Lucy II 4.3.8+ and Marco 2.0+. Page 30 describes 1 TB recording and retrieval through web, Lucy II or FTP/SCP. Ethernet arrays require timing, software, power and network configuration.
Supports: Capability · commercial availability
The icListen 2025/26 user guide specifies firmware 41.0 compatibility with Lucy II 4.3.8+ and Marco 2.0+. Page 30 describes 1 TB recording and retrieval through web, Lucy II or FTP/SCP. Ethernet arrays require timing, software, power and network configuration.
Ocean Sonics describes icListen as a smart digital hydrophone for acoustic monitoring, streaming, recording, arrays, and onboard processing of underwater sound data.
Supports: Mission area · Underwater ISR
Source location: Reviewed source summary
Ocean Sonics describes icListen as a smart digital hydrophone for acoustic monitoring, streaming, recording, arrays, and onboard processing of underwater sound data.
Ocean Networks Canada identifies deployed icListen HF/AF instruments and documents hardware-specific orientation data. Hardware version 6 has no orientation sensors. This 2022 observatory documentation does not qualify every current product variant.
Supports: Capability · maturity
Ocean Networks Canada identifies deployed icListen HF/AF instruments and documents hardware-specific orientation data. Hardware version 6 has no orientation sensors. This 2022 observatory documentation does not qualify every current product variant.
The icListen family uses 24-bit sampling, supports model-dependent sampling rates up to 512 ksps, provides up to 1 TB of internal storage, and exposes Ethernet-based streaming and file-transfer protocols.
Public sources cited · Facts and assessments kept separate · Human review
The icListen 2025/26 user guide specifies firmware 41.0 compatibility with Lucy II 4.3.8+ and Marco 2.0+. Page 30 describes 1 TB recording and retrieval through web, Lucy II or FTP/SCP. Ethernet arrays require timing, software, power and network configuration.
Supports: Capability · core features
The icListen 2025/26 user guide specifies firmware 41.0 compatibility with Lucy II 4.3.8+ and Marco 2.0+. Page 30 describes 1 TB recording and retrieval through web, Lucy II or FTP/SCP. Ethernet arrays require timing, software, power and network configuration.
