• Underwater sound recorder
• Pressure sensor (0 to 1000 psi) (device depth)
• Temperature sensor (-10 ° C to 40 ° C)

• Duration: can be deployed up to one year *
  (*Depending on setting parameters)
• 16 Bits digital recording
• Programmable recording mode:
  • continuous with pause
  • delay start
  • time spaced recording
• Configurable sampling rate:
  256 H z to 32 768 Hz
• Usable frequency range:
  5 Hz to 16 384 Hz
• Adjustable amplifier  : 16, 18, 20 et 22 DB
• Hard disk storage using WAV file format
• TCXO time base for stability
• Low power Logic and CPU
• Programming through RS232 (38,4Kbs, N, 8, 1)
• FAT32 Support (hard drive)
• WAV Support (files)
• 2 softwares included: AURAL Setup for device configuration and InfoWAV for extract informations contained in the headers of WAV files saved.
• Three (3) sizes available: 16-batteries, 64-batteries and 128-batteries.

• Anti-aliasing filter
• Hydrophone HTI-96-MIN (Options available on demand)
• Delrin, Fiberglass/Epoxy and Stainless steel 316 case tested in salt water
• Uses Standard Size “D” Alkaline Batteries (Options available on demand)

 

Dimensions:

AURAL-M2 is available in 3 differents sizes: 16 batteries, 64 batteries and 128 batteries. The number of batteries affect the lenght of the mooring. Bigger is the size of the AURAL, longer will be the recording period.

Specifications:  

General
Suply Voltage	12VDC nominal (9VDC to 15VDC)
Tested depth	300 meters
Operating temperature	0 °C to 40 °C
Case Material	Stainless Steel 316, Delrin, Fiberglass
Anode Material	Zinc
Analog Section
A/D	16 Bits
Filter	Programmable frequency 8th order linear phase low pass (anti aliasing)
Amplifier	Low noise amplification with 16, 18, 20 & 22 dB selectable gain
Pressure Sensor	0 to 1000 psi (0-682 m.) (resolution: 1,3 cm, display: 0,1 m, accuracy: +/-0,25 % max)
Temperature sensor	-10 °C to 40 °C (resolution: 0,0625 °C, display: 0,1m, accuracy: +/-0,5°C)
Hydrophone	HTI-96-MIN
Usable Frequency range	10 to 128, 256, 512, 1024, 2048, 4096, 8192, 16 384 Hz
Digital Section
MCU	33 MIPS Dallas DS89C450 Ultra High Speed Flash Microcontroller
Flash Type & Size	Compact Flash 1 GB or more
Hard Disk Size	2,5 inches Hard Disk 320 GB or more
Hard Disk Data Transfer Speed	1.5 MB/Sec
Time Base	Low power 32,768 KHz TCXO with +/- 2ppm accuracy
Communication	RS232 (38.4 Kbs, N, 8, 1)
System File Format	FAT32
Audio File Format	WAV
Sampling Rate	256, 512, 1024, 2048, 4096, 8192, 16 384, 32 768 samples/seconde

 

Mooring:

Different methods can be used to immerse an AURAL-M2. The surrounding where the unit will be based must be exempt of any harmful noise. The following example is a mooring that has already been done by customers.

Open Seas Instrumentations Inc., SUBS (A) buoyancy significantly enhances data set quality from current meters, while decreasing buoy frontal area and drag coefficients.

Ixsea: The rugged and reliable OCEANO Oceanographic Acoustic Releases (D) are suitable for all mooring applications in all seas and environmental conditions with their low power consumption and corrosion resistance.

 

 

A. Buoy

B. Cable/Chain

C. AURAL-M2

D. Acoustic release

E. Heavy object such as train wheel

 

 

 

 

To meet the special needs of some customers, we designed a new version of AURAL-M2: the External AURAL, perfect for short and long deployments that don't requires underwater deployment. It must be used where a source of energy is available.

For example, it may be used directly on a boat (and powered by a 12V battery) since he has a HTI-96 hydrophone and a 2 meter long cable (different length available). Here are some features of the External version of the AURAL: