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Inhalt des Kurses
Invention Design 2
In dem Kurs Invention Design suchen Studierende Anwendungsmöglichkeiten für neue Technologien. Bilderkennung, Machine-Learning, 3D-Audio, LIDAR: Ihren Nutzen entfalten technische Möglichkeiten durch ihren sinnvollen Einsatz.
Nodus is an audioguide for the navigation of divers underwater. For this purpose it uses the technology of 3D Audio (also known as binaural or spacial audio). This makes it possible to locate where the audio signal is coming from. For more information, just watch our video and read the Q&A below!
Try it out yourself
To enable you to experience it for yourself, we have created a 3D scene in which you can navigate and follow the sound to the target. Please open it only with Google Chrome and wear headphones.
It might take a while to load. If the explanation in the beginning (where u can see the arrows and how to control the scene) doesn’t disappear when you’re moving, the scene hasn’t loaded correctly.
Use the arrows to move and the trackpad/mouse to point with your “head” in the desired direction.
Note: The Sound you hear in the scene isn’t true 3D audio, because that wasn’t possible with the framework (A-Frame) we used. It still demonstrates well what we wanted to show.
What is 3D Audio?
You probably know surround sound – this involves placing speakers around where you sit in order to immerse yourself in the audio. A similar principle is applied to headphones, but it’s not limited to the amount of speakers you have. It also goes far beyond stereo, you can really hear sounds coming from above and below, behind or in front and right or left of you. It makes you hear sounds as if they were happening around you, and not coming out of a set of speakers.
To see – or rather, hear – what we’re talking about, put on a pair of standard headphones, close your eyes and enjoy this demo.
How do divers usually navigate?
There are two basic ways to navigate as a diver: Natural navigation and navigation by compass. The goal is always to make a dive without having to go to the surface in between.
Natural navigation means orientation based on your surroundings and without the use of technical aids such as a compass. For example, the position of the sun, currents, sand ripples, prominent points such as rocks or sunken trees etc. But sometimes it can be difficult to find your way back to the boat if the surroundings change due to high tide or if you dive back at a different altitude.
Divers normally use a compass when prominent natural points are missing and orientation is easily lost. This is true, for example, in foggy water. In this condition it can quickly happen that you dive in a circle without noticing it. Unfortunately compasses are difficult to use, especially for beginners.
What functions do diving computers have?
Dive computers already exist, they look like a smart watch. However, they are not used in the way you might imagine - they are not a small navigation system like the one you have in your car. They are designed and equipped to give you vital information – such as your diving time, the depth you are at, your ascent rate, and decompression stops.
They can also have further functions like:
show how much air is in your tank
Interface with your laptop so you can download your dive data
Electronic compass or built-in thermometer
How does position tracking work underwater?
GPS doesn’t work underwater because it works on microwave frequencies, which water absorbs very effectively.
But there’s a new technology called “Ariadna”, which makes position tracking possible. It consists of a Wrist Unit and a Navigation Transmitter that you wear on your leg. On the surface, the wrist unit uses its GPS receiver to obtain positional information. Upon submerging, where the GPS signal is not available, it relies on the navigation transmitter based on POSIO (TM) technology for navigational data. The navigation transmitter uses divers swimming motion capture sensors to measure diver’s real-time position, speed, heading and distance information underwater. That’s how it’s possible to record your 3D underwater route.
We have developed the concept of “nodus” based on this technology.
How can I equalize while wearing headphones underwater?
Vented earplugs for scuba divers already exist, for example Doc’s Proplugs. It’s safe, doctor-created, and used by many divers to keep water out while making pressurization easier.
We imagine our waterproof nodus headphones to work similar to those: They would have a small hole in the middle to make pressure equalization possible.