These waves are higher frequency than surface waves. P waves are also known as compressional waves, because they push and pull. Particles subjected to a P wave move in the same direction that the wave ...

We can’t hear all levels of sounds. Sound waves with very high frequencies are called ultrasound and our ears can’t detect them. Ultrasound waves have multiple uses including: detecting ...

This year is the centennial anniversary of German psychiatrist Hans Berger's invention of electroencephalography (EEG), a way ...

The human brain contains billions of neurons ... generate oscillations of electrical activity, or brain waves, which can have ...

When two tones of slightly different frequencies are played in separate ears simultaneously (usually through headphones), the human brain perceives ... corresponding brain wave: Beta waves ...

Blinking at a rate of 1 billion times per second, or 1 GHz, is not possible for a human being. But this is the current ... Terahertz (THz) technology refers to the use of electromagnetic waves in the ...