Details

All around the Earth, a quiet keynote sounds without pause. Between the Earth's surface and the ionosphere, some 60 to 90 kilometres above us, electromagnetic waves arise, driven by the roughly two thousand thunderstorms active somewhere on Earth at any moment. The German physicist Winfried Otto Schumann predicted this phenomenon in 1952, and ever since it has been known as the Schumann resonance. Its keynote lies at around 7.83 Hz.

What the Dual Earth does

The Dual Earth Frequency Generator is a small frequency generator that produces the Schumann frequency of 7.83 Hz itself, and also 3.92 Hz: exactly half, for the evening and the night. Hence the name: two frequencies of the Earth in one small device. It runs on two AAA batteries, which are included, and has just one button, so it travels as easily as it sits at home.

Three settings

Day mode, 7.83 Hz (Schumann frequency): the green light flashes. It stays in this mode and switches itself off after 24 hours.
Night mode, 3.92 Hz: both lights flash. Half an hour at 3.92 Hz, after which it continues at 7.83 Hz.
Night mode 30 minutes: the yellow light flashes. Half an hour at 3.92 Hz, then it switches off. For anyone who only wants it on while going to bed.

How to use it

No headphones or cables needed: you hear nothing, it works in the space around you. Switch it on and place it where you are. Ours sits on the bedside table at night, fairly close to the bed, and on the desk during the day.

The Dual Earth was developed by Meditech Europe in Emmeloord, the Netherlands.

Specifications