SPL TOOLBOX is Seiche’s new proprietary Source Pressure Level Field Data Processing and Analysis Software.

It allows underwater acoustic and navigation data to be processed, analysed and interpreted for actionable and understandable results to clients.

Regulators are increasingly recognising the value of field data and mandating their use in operational planning.

SPL TOOLBOX has the capability to reveal the temporal, spatial and spectral characteristics of a sound field produced by one or more underwater acoustic sources. It integrates a variety of tools that provide the versatility necessary to adapt to the specific requirements of each project, while following a seamless four-stage methodology (data import, processing, revision and post-processing/representation).



Sound Source Verification

Ambient and soundscape studies

Environmental Impact Assessment

Exclusion zone estimation



Processing of continuous and transient sounds

Support for WAV and RAW audio formats

Support for GPS, AIS and P190 navigation formats

Automatic detection of individual, transient sources (e.g. air guns, pile strikes, sonar)

Single event (SPLrms, SPL0-p, SPLp-p, SEL) and multiple event (cSEL) acoustic metrics

Broadband and frequency band analysis

Calculation of navigation parameters for receiver and sources, including speed, course, range, bearing and bearing-to-source heading angle

Marine mammal auditory weighting based on latest research, current and older legislation, as well as guidelines for Europe and the US

Spatial, temporal and spectral representations of processed acoustic measurements, for single events or in the form of statistical analysis

Practical graphic user interface (GUI)

Estimation of exclusion zones for marine mammals

Generation of lightweight database per audio file containing settings parameters and processed acoustic and navigation data


Seiche Ltd works with Ørsted during construction of its Hornsea Two offshore wind farm

Seiche Ltd Undertakes Underwater Acoustic Field Verification Survey and Marine Mammal Mitigation in Northern Spain for ACSM

Seiche Ltd and Deep Vision Inc. Announce Collaboration to Develop Real-time Camera System for Automated Detection, Geo-location and Quantification of Marine Mammals

Industry Leader Interview with our Associate Director, Nicola Harris

Ørsted contract win for Seiche during construction of world’s largest offshore wind farm – Hornsea Two

Seiche Water Technology Group appoints Pete Bromley to Group Engineering Director

PAM Buoys: providing wireless marine mammal monitoring

Successful environmental mitigation services programme with Triton Knoll concludes

AutoNaut USV with Seiche array maps North Sea soundscape during lockdown

AutoNaut systems in support of offshore industry

Triton Knoll Offshore Wind Farm prioritises Marine Mammal Safety

Unmanned Vehicles: Wave Power

Sounding Out Offshore Drilling

New Eyes for Marine Mammal Monitoring

Launch of new Acoustic Monitoring Technology at Oi2020

Seiche Environmental strengthens global management team with key appointments

Seiche Water Technology Group promotes Mark Burnett to Chief Executive Officer

Seiche at the World Marine Mammal Conference

In-house training at Orbis Energy Limited

Seiche at the Underwater Sound Forum

Mark Burnett presents at the Marine Autonomy and Technology Showcase

Seiche at the Marine Technology Society's Oceans in Action conference

The Ocean Cleanup now clearing plastic

We're joining forces for our fourth KTP with University of Bath

Africa Oil Week

Seiche at the 2019 Effects of Noise on Aquatic Life conference

Seiche sponsors ECO Magazine's special issue on OceanSound

We're on BBC Spotlight

The Ocean Cleanup Environmental Monitoring results are now available

University of Bath and Seiche KTP programme success

AutoNaut to launch new 3.5 Metre Communications Hub USV

ORCA and Seiche Training announce innovative new training course

BBC Radio 4’s Inside Science features AutoNaut in icy conditions

Seiche COO, Mark Burnett, talks at the Marine Autonomy and Technology Showcase

AutoNaut USV accompanies The Ocean Cleanup in the Pacific Ocean

The Ocean Cleanup – countdown to launch!

Seiche is Official Partner for The Ocean Cleanup

Boris Johnson admires the AutoNaut USV

Seiche’s COO Mark Burnett talks at the Met Office

Seiche Water Technology Group announces Mark Burnett as Chief Operating Officer

Come and see us at Oceanology International - Stand A251

Coastal Monitoring of Water Quality using AutoNaut Uncrewed Surface Vessel (USV)

Seiche Launching Environmental Services Offering

Gulf of Mexico Marine Monitoring

Low visibility methods for detecting marine life

Passive Acoustic Monitoring By USV: Wave-Propelled AutoNaut Comes Of Age

Oceanoise 2017

At the European Cetacean Society conference

Oceanoise 2017

Listening station in Denmark

Ocean Business 2017

Second Knowledge Transfer Partnership (KTP) with Seiche Ltd ‘Outstanding’

Monitoring Nesting Sea Turtles using a Thermal Camera - Eco Magazine

Bath University's KTP@40 celebration

Marine Robotics Innovation Centre - Seiche and AutoNaut become members

AutoNaut deploying state of the art sensors at Royal Navy 'Unmanned Warrior' Event

Seiche's Digital Array Showcased in Portsmouth

Working with ASV and the University of Louisiana

Tech Track 100 Awards

Underwater Noise Pollution