Underwater Acoustic Modems
delivering data that matters
delivering data that matters
● Underwater Acoustics
Underwater Acoustic Modems
● EvoLogics underwater modems deliver robust, full-duplex digital communication using our field-proven S2C (Sweep-Spread Carrier) technology.
Engineered for high performance in dynamic subsea environments, the S2C algorithm adapts to changing conditions to maintain reliable data links and deliver information where others fail. Our acoustic modems and USBL devices are precision-built for durability and seamless integration across a wide range of underwater tasks - from subsea vehicle control and diver tracking to complex sensor networks and long-range data retrieval.
Each model is available in a variety of configurations, with additional hardware and firmware options to support positioning, sensing, integration, and networking-specific tasks.
Underwater Acoustic Modems
Each model’s transducer combines a specific frequency range - defining the speed-versus-range trade-off - and a directivity pattern that determines the optimal transmission direction: horizontal (same depth), vertical (depth-to-surface), or slant (diagonal path between depths).
Underwater Acoustic Modems
PRO Series
The largest and most powerful modems in the EvoLogics range.
PRO models offer the highest transmission power and the widest selection of configuration options and addons. The series features our full range of models, including low-frequency, long-range, deep-rated devices for deep-sea deployments.
MINI Series
Compact and lightweight without compromising on performance.
MINI modems match PRO-series transmission power in a smaller form factor. Ideal for space-constrained setups, TINY series features high- and mid-frequency models and offers key configuration and addon options.
TINY Series
Ultra-compact form factor for size- and weight-sensitive applications.
TINY series features our high- and mid-frequency models with balanced transmission power and a focused selection of basic configuration and addon options.
PRO USBL Series
PRO USBL transceivers are full-fledged PRO modems with a USBL antenna, enabling simultaneous positioning and advanced data delivery.
Underwater Acoustic Modems
[01]
Reliable Communication
The adaptive S2C protocol ensures stable, full-duplex communication in dynamic and noisy underwater environments.
[02]
Wide Range of Options
A selection of frequency ranges, directivity patterns, form factors and depth ratings to pinpoint the optimal solution for complex application scenarios.
[03]
Robust Feature Stack
All EvoLogics modems support advanced data delivery, multiple data handling methods, addressing and networking, with a comprehensive command set to configure the settings and precisely control the performance.
[04]
Powerful Add-ons
Extend modem capabilities with optional hardware and software modules for advanced positioning, energy-efficient power management, remote activation or recovery, precise synchronization and custom software development.
[05]
Seamless Integration
Whether for uncrewed vehicles, sensor stations, or fixed subsea infrastructure, our modems are available in configurations that support diverse integration needs.
[06]
Proven Technology
Trusted by industry professionals, academic institutions, and research teams worldwide.
Underwater Acoustic Modems
Even in calm waters, signal reverberation and rapid changes in channel properties can degrade transmission quality and significantly reduce its speed. And when sea conditions turn for the worse, many acoustic systems on the market fail, and data is lost.
Even in calm waters, signal reverberation and rapid changes in channel properties can degrade transmission quality and significantly reduce its speed. And when sea conditions turn for the worse, many acoustic systems on the market fail, and data is lost.
Multipath propagation
Signals often reach the receiver via multiple paths due to reflections, leading to interference and distortion.
Signal fading and variable delays
The underwater acoustic channel is highly unstable, so the signal strength fluctuates over time and distance.
Limited bandwidth
Compared to radio or optical systems, underwater acoustics transmissions offer very narrow bandwidths, restricting data throughput.
Dynamic stratification of the water column
Variations in temperature, salinity, and pressure create layers of various densities within the water column. Acoustic waves traveling through these layers are refracted, traveling along curved paths instead of straight lines - a phenomenon known as ray bending.
Underwater communication
To tackle the issues of transmitting data underwater, EvoLogics’ founder Dr. Rudolf Bannasch turned to nature. In the 1990s, he studied dolphins, which use a variety of complex acoustic signals to communicate effectively across long distances in noisy seas. Dolphins and whales “chirp” and “sing” with modulated tones across a wide frequency bandwidth. This continuous change of frequency not only conveys information to their peers but also counters the effects of interference and background noise.
After eight years of research into the physics of dolphin communication, EvoLogics introduced and patented the Sweep-Spread Carrier (S2C) technology - an advanced acoustic communication method that mimics the way dolphins adapt their signals to dynamic underwater environments.
To follow dolphin sound patterns, S2C uses a complex modulation technique in which the frequency of the carrier signal continuously sweeps across a defined range while simultaneously being modulated with data. This unique approach results in a highly resilient signal that maintains integrity even in the presence of noise, echoes, and other challenges that the underwater environment imposes on acoustic communication.
Today, S2C technology is at the core of the EvoLogics ecosystem - powering our underwater acoustic modems and positioning systems, enabling diver navigation solutions, and forming the communication backbone of our advanced subsea robotics.
Underwater communication
Contact
We design a wide range of underwater communication solutions and can provide expert guidance for any operation scenario.
Whether your assets operate in shallow waters, deep seas, over short ranges or across extended perimeters, we can recommend the optimal system configuration for your challenge.
Get in touch and share your application outline - we are here to find the best solution for your project.
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