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 ...

Home > Press release: Brain waves in harmony: when neurons ...

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 ...

“Metasurfaces are engineered materials that manipulate wave behaviour in ways that natural materials cannot,” said Zhong. “In ...

another way to characterize the wave is by the number of waves received per second. This is the frequency of the wave. Morrison and Cocconi considered how well the types of electromagnetic waves ...

Ultrasound refers to sound waves with frequencies above the range of human hearing, or 20 kHz. These waves travel through the air like normal sound waves but are inaudible to people. Because ...

This class focuses on the role of waves in human body systems through student-directed inquiry ... Key concepts covered include sound waves, hearing, wavelength, frequency, amplitude and heart rate.