Our high performance underwater acoustic recorders DORI

High acoustic performance, large storage capacity and low power are our three key words. Abyssens offers a line of underwater acoustic recorders with more than 110 dB of dynamic range, listening up to 250 kHz and with a maximum storage capacity up to 16 TB. Whether your need is occasional short listening or long-term monitoring, coastal or deep sea, an adapted design with an optimized price awaits you among the models below.

All the sea soundscape at your doorstep! Two frequency ranges are available and offer you a complete listening range of the underwater soundscape. In fact, they allow you to listen many types of acoustic sources such as biological sounds from snapping shrimps to the vocalizes of marine mammals, as well as human sounds from ship radiated noises to offshore works. Thanks to a self noise below sea state zero and a high dynamic range, ambient noise can be monitored together with high level sources.

All is included!

Hydrophone, One set of alkaline cells or Rechargeable battery with charger, Storage, Pressure relief valve, DaViS software, Accessory kit

Key specifications of our underwater acoustic recorders

✓ High dynamic range: 110 dB

✓ High storage capacity up to 4 TB (XS model) or 16 TB (L model)

✓ 3 power approaches: externally powered, internal UN38.3 air transportable rechargeable battery or alkaline C or D cells

✓ Clean and secure access to SD cards and energy (without contact with electronics)

✓ Configuration over WiFi (without opening the recorder)

✓ Software configurable amplification gain and high pass filter

✓ Raw data storage (.wav) on 24 bits

✓ Self noise below sea state zero

✓ Remote software update of the recorder

A modular line of underwater acoustic recorders

Our underwater acoustic recorders DORI differ according to several criteria:
  • First, the model of the recorder reflects the autonomy of the device, and is in adequacy with available energy and the maximum storage capacity. It is indicated by the letter: XS-S-M-L. The S model if for short deployments (15 days), the M model for medium deployments (3 months) and the L model for long deployments (6 months).
  • Secondly, the type of internal power used: internal air transportable rechargeable lithium battery or alkaline cells (C and D). It is indicated by the letter: c-b.
Note that the XS version is powered by an external source and does not have an internal battery. It is thought to be integrated aboard vehicles such as ROV, AUV or gliders thanks to its very small size. It can also be used as a wired observatory with a cable on request.

The target frequency range is divided into two categories for all models:

  • Low Frequency LF, equipped with an HTI96 MIN Low noise hydrophone: 2 Hz – 30 kHz,
  • High Frequency HF equipped with an HTI99UHF hydrophone: 2 Hz – 250 kHz (allows click detection from marine mammals including the harbor porpoise).

An optional remote hydrophone option is available.

In addition, an optional external temperature sensor is available.

Specific request ? The acoustic recorder is compatible with other types of hydrophones such as GeoSpectrum M36-900 or B&K and an adapted design devoted to deep sea surveys is available.

Easiness, efficiency and reliability are our priorities

Clean and safe access to SD cards and energy

DORI design features an opening with a clean and protected access to the SD cards and the internal battery or alkaline cells without any contact with the electronics. Therefore you can enjoy a fast, clean and safe SD cards and alkaline cells change directly on the boat if needed! You can take advantage of the maximum data download speed of your computer by direct SD card access.

Easy to use and safe design

To ensure the safety, a pressure relief valve is present on all systems. In addition, an optional vacuum kit is available. The kit allows you to test the watertightness of the device before deployment. This kit is compatible with all DORI recorders.
No cables are needed for configuration. You can use your smartphone or your laptop to access the recorder configuration directly in the field using WiFi without opening the recorder. To start the recording, nothing easier! No cables or magnets needed, you just have to turn on the selector to record position. Last recording configuration is automatically launched.

DaViS : DAta VIsualization Software

A post treatment dynamic visualization of the data is possible with the dedicated software: DaViS. It displays the spectrogram, the temporal evolution of Sound Pressure Level (SPL), the Power Spectral Density and the third octave band levels. In addition, this software allows an audio listening. This software is compatible with windows and free of charge (supplied with any recorder).

How to choose your underwater acoustic recorder?

Use our online configurator to this purpose. First fill in your recording needs, then the configurator identifies the optimal recorder for you.

Full technical specifications of DORI recorders

The table below shows in details the technical specifications of DORI recorders.

Reference (base)
DORI_recorder_XS DORI_recorder_Sb






ADC 24 Bits
Analogue bandwidth 2 Hz – 30 kHz (LF) OR 2 Hz- 250 kHz (HF)
Dynamic range 110 dB
High pass filter 10 Hz or 370 Hz (Software configurable)
Gain 0 dB or 12 dB (Software configurable)
Sampling rates 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
Maximum acoustic level
185 dB (with 0 dB gain)
User configuration
Recording Continuous, Scheduled, Duty cycling
Storage Raw data (.wav)
Configuration WiFi (without opening the recorder)
Type Internal SD Card Storage
Maximum storage 4 TB 10 TB (HF) – 4 TB (LF)
16 TB (HF) – 10 TB (LF)
Internal power

No internal power, external only
Rechargeable lithium battery or 10 alkaline C Cells Rechargeable lithium battery or 24 alkaline D Cells Rechargeable lithium battery or 48 alkaline D Cells
Autonomy for continuous recording
Battery version
11 days 2.9 months 5.6 months
Alkaline cells version 17 days 3.4 months 6.9 months
Autonomy details
see our online configurator or the autonomy tab for each product
Diameter 90 mm 145 mm
Length LF (HF: +23 mm)
150 mm (without connector) 277 mm
battery version: 490 mm
cells version: 392 mm cells version: 576 mm
Battery version  weight
0.7 kg
1.5 kg
6.5 kg
9.0 kg
Cells version weight (with cells)
1.9 kg
7.1 kg
12.0 kg
Pressure relief valve Included
Maximum operating depth* 300 m
250 m
Available options

(mandatory option)

SH  = -185 dB re 1V/μPa

Temperature sensor Accuracy: ± 0.1 °C (between -5 to 50 °C); ± 0.5 °C (between -40 to 125 °C)
Protective cage for hydrophone Allows hydrophone shock protection. Increases the recorder LF length by 45 mm.
Transport case 414 x 345 x 174 mm cells version: 502 x
415 x 246 mm
687 x 528 x 276 mm
battery version: 687 x528 x 276 mm
Vacuum kit Compatible with all DORI recorders. Allows watertightness test.

* : other depths available on request

** : other hydrophones available on request