The MULTHY recording system can hear up to 4 times further, thanks to its 16 acquisition channels. MULTHY has a listening surface 16 times larger than an RTsys RESEA recorder, which can only accept up to 4 hydrophones.
MULTHY is a system made up of a recorder coupled to an acoustic antenna (linear, flat or geometric) equipped with 16 omnidirectional hydrophones. The system is less than 20m long and can be launched by 2 people from a light boat. The multiple hydrophones, in combination with digital processing, reduce noise and therefore improve signal quality. The equipment can record below the marine background noise over a frequency range up to 100 kHz.
A new circuit board
The success of this challenge essentially rests on a modification of the SDA (Synchronous Data Acquisition) circuit board which is at the heart of all RTsys products. While maintaining an identical format and a power consumption that is still under control, the new version SDA-416 has considerable calculating power and 4 times the functionality of the prior version.
MULTHY is intended for acoustic engineers and operators using consultants. With 16 hydrophones, the user can record over the same area as 4 RTsys RESEA recorders, while reducing costs, or add other sensors to the system, for example multi-parameter sensors. In common with the other RTsys products, all of the raw data is stored in the device and can be retrieved at the end of the mission.