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 ...

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 ...

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 ...

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

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.