About us

In a world of constant change, characterised by challenges in digitalisation and sustainability, new legal requirements and the acute customer need to establish new business models, we offer contemporary and future-proof software solutions to master these challenges.

With a clear focus on our standardised products and technologies, we identify and create disruptive business fields with new revenue opportunities for both customers and strategic partners.

In this way, we accompany cities (and municipalities) in their transformation to a smart city. Together with our partners, we digitise mobility, buildings and public infrastructure, realise a new type of siren that not only warns, but also informs citizens and gives concrete instructions for action in the event of a disaster. And we are helping to establish public transport as a central player in the field of smart mobility.

All of this with intelligent solutions that expand existing infrastructures in a meaningful way and thus advance the digital transformation quickly and cost-effectively. With data and analyses that serve as the basis for valid management decisions to improve business and the customer experience / satfisfacion.

Our decentralised, international team of 10 employees creates solutions for identified problems and needs of our customers and strategic partners quickly and effectively in an agile corporate structure.

Local. National. International.

We are ISO 9001 certified.


Our locations are directly at the port of Wismar and in the Hamburg Speicherstadt.

Hanseatic City Wismar

Alter Holzhafen 15
23966 Wismar

Hanseatic City Hamburg

Pickhuben 2
20457 Hamburg


The protagonists behind Visible Sound Technology.

Thoralf Nehls
Thoralf NehlsChief Executive Officer
Kristiaan De Jongh
Kristiaan De JonghChief Technology Officer