| XS | S | M | L | |
|---|---|---|---|---|
| Reference (base) | DORI_recorder_XS |
DORI_recorder_Sb DORI_recorder_Sc |
DORI_recorder_Mb DORI_recorder_Mc |
DORI_recorder_Lb DORI_recorder_Lc |
| Acoustics | |
|---|---|
| ADC | 24 Bits |
| Dynamic Range | 110 dB |
| Analog High Pass Filter | 10 Hz or 370 Hz (Software configurable) |
| Analog amplifier gain | 0 dB or 12 dB (Software configurable) |
| Sampling rate |
LF : 31,25 kSps, 62,5 kSps, 125 kSps HF : 31,25 kSps, 62,5 kSps, 125 kSps, 250 kSps, 360,36 kSps, 400 kSp |
| RTC Accuracy | 1 ppm |
| Hydrophone | |
|---|---|
| Low Frequency [LF] | Hydrophone HTI-96-MIN Low noise – Analog bandwidth : 2 Hz – 30 kHz |
| High frequency [HF] | Hydrophone HTI-99-UHF Low noise – Analog bandwidth : 2 Hz – 250 kHz |
| SH for LF & HF | Standard : -185 dB re 1V/μPa, other on request |
| User Configuration | |
|---|---|
| Recording Mode | Continuous or Duty Cycle |
| Planning Mode | Immediate or planned start |
| Storage | Original material [.wav] with selectable file duration |
| Configuration | WiFi(No need to turn on the hydrophone) |
| Memory (internal micro SD card) | |||
|---|---|---|---|
| Maximum storage | 4 TB |
10 TB [HF] 4 TB [LF] |
16 TB [HF] 10 TB [LF] |
| Power supply | ||||
|---|---|---|---|---|
| Internal power supply | No internal power supply, only external power supply | Rechargeable lithium battery or 10 alkaline C batteries | Rechargeable lithium battery or 24 alkaline D batteries | Rechargeable lithium battery or 48 alkaline D batteries |
| Battery version | - | 11 days | 2.9 months | 5.6 months |
| Internal power supply | - | 17 days | 3.4 months | 6.9 months |
| Mechanical properties | ||||
|---|---|---|---|---|
| Diameter | 90 mm | 90 mm | 145 mm | 145 mm |
| LF length (based on LF integration) High Frequency: +23 mm; Remote：-42mm | 150 mm (Without connector ） | 277 mm |
battery version: 490 mm cells version: 392 mm |
battery version: 490 mm cells version: 576 mm |
| Battery version weight | 0.7 kg | 1.5 kg | 6.5 kg | 9.0 kg |
| Cell version weight (including storage cells) | 0.7 kg | 1.9 kg | 7.1 kg | 12.0 kg |
| Maximum operating depth | 300 m | 300 m | 250 m | 250 m |
ABYSSENS DORI Recorder - M Cells Version
vs.
Ocean Instruments SoundTrap ST600 HF
Comparative report on technical performance of underwater acoustic recorders
Technical description and capability introduction
1. ABYSSENS DORI Recorder - M Cells
ABYSSENS DORI Recorder M Cells version is a modular device designed for long-term underwater high-frequency acoustic monitoring with advanced acoustic processing capabilities. Its built-in SSD can store up to 10 TB of recording data, supports a frequency range of 2 Hz to 250 kHz, has a dynamic range of 110 dB, can record extremely weak sound sources and has self-noise below Sea State Zero.
This device specifically supports Wi-Fi remote parameter settings (including gain and filter), and is paired with DaViS dedicated software for sound wave visualization and post-processing analysis. The device is powered by 24 D-size alkaline batteries, which last up to 3.4 months. Suitable for deployment in medium and shallow waters (maximum depth 250 meters), it can be equipped with optional protection cage and anchor bracket to improve on-site operation stability.
2. Ocean Instruments SoundTrap ST600 HF
The ST600 HF is a long-term deployment underwater recorder designed by Ocean Instruments, focusing on stability, durability and high operational flexibility. With a frequency response range of 20 Hz to 150 kHz and a maximum sampling rate of 384 kS/s, it is suitable for environmental acoustics, ecological monitoring and marine engineering recording.
The device is powered by 12 lithium batteries with a battery life of up to 150 days. It supports quick on-site battery replacement and microSD memory cards (up to 4 cards, totaling 2 TB). The fuselage is made of titanium alloy and has a built-in detachable hydrophone protection cage. The standard pressure-resistant depth is 200 meters, and the optional pressure valve can reach 500 meters.
Technical performance comparison table
| Performance Project | ABYSSENS DORI Recorder | SoundTrap ST600 HF |
|---|---|---|
| Frequency range | 2 Hz – 250 kHz（Support LF+HF） | 20 Hz – 150 kHz |
| Memory capacity | Up to 10 TB (built-in SSD) | 2 TB(4 microSD cards) |
| Maximum sampling rate | 384 kS/s | 384 kS/s |
| Dynamic Range | Up to 110 dB | Approximately 90–100 dB |
| Self-noise performance | Below Sea State Zero | Medium |
| Deployment Depth | Maximum 250 meters | Standard 200 meters (optional up to 500 meters) |
| Power supply type | 24 D-size alkaline batteries | 12 Li-ion batteries |
| Battery life | Up to 3.4 months | Up to 150 days |
| How it works | Wi-Fi Settings + DaViS Software Analysis | USB setting, supports field replacement of memory cards |
| Housing and protection | Optional protection cage and anchor frame | Titanium alloy body with built-in protective cage |
| Module expansion capability | Support temperature sensor and vacuum test | Basic modularity, suitable for rapid deployment |
DaViS Underwater Acoustics Software
Dynamic visual playback software
The data can be dynamically visualized after treatment using the dedicated software DaViS. It performs acoustic analysis in replay mode from .wav files of the DORI underwater acoustic recorder.
DaViS Display：
• Spectrum plot,
• Time evolution of the sound pressure level (SPL),
• Power spectral density,
• Third octave level.
In addition, the software also allows listening to audio.
Main specifications of our underwater acoustic data display software DaViS
Hydrophone gain and sensitivity automatically populate
Sound levels are directly referenced to dB re 1µPa
Modular display, user-friendly
Free – included with the logger
Detailed information on our software technical specifications
Modular display
The following table shows the display and interactive tools available for each chart.
| Configuration | ||||
|---|---|---|---|---|
| Spectrum | Graphic design | Frequency Response | 1/3 Octave | |
| NFFT（Frequency resolution） | ✓ | ✓ | - | - |
| Integration time | - | ✓ | ✓ | ✓ |
| Frequency band | - | - | 3 Frequency band | ✓ |
| Tool | ||||
|---|---|---|---|---|
| Soaring | ✓ | ✓ | ✓ | ✓ |
| Pointer to display value | ✓ | ✓ | ✓ | ✓ |
| Logarithmic/linear frequency scale | - | ✓ | - | - |
| Display duration | ✓ | ✓ | - | - |
| Color bar selection | ✓ | - | - | - |
| Area of interest selection | ✓ | - | - | - |
Area of interest selection
The time interval of interest can be selected by selecting directly in the spectrogram. Next, another section appears with the final acoustic information about this selected interval: a zoom of the spectrogram, the power spectral density, the third octave level and the SPL value are displayed, while the real-time values are still shown on the main graph.
Method
The spectrogram corresponds to a time-frequency display. Underwater sound levels are expressed in dB re 1µPa (reference value for underwater acoustics) and are estimated using the following criteria:
• ISO 2017 standard for sound pressure level SPL (Magnier et al., 2020).
• ANSI /ASA S1.11-2014 Level standards for the third octave.