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Researchers make sound waves travel in one direction only, with implications for electromagnetic wave technology
They sent a sound wave with a frequency of around 800 Hertz (roughly the high g of a soprano) through the first waveguide and measured how well it was transmitted to the second and third waveguides.
HowStuffWorks on MSN9mon
Frequency Formula Basics: 2 Ways to Calculate Frequency
A guitar string vibrates with a frequency of 440 Hz when producing the note A4. Suppose you want to find the wavelength of this sound wave in air. To find the wavelength, you can use the ...
Study Finds on MSN10d
Gamma stimulation for Alzheimer’s patients: 40-hertz sensory therapy shows tremendous promise
Researchers at MIT have discovered that exposing the brain to light and sound pulses at a specific frequency—40 hertz, or 40 cycles per second—can induce brain rhythms that reduce the hallmark ...
Nevada Appeal3d
CAPS: Using whistles to alert your dog
If you decide to use a silent whistle, introduce it with treats. Blow the whistle; give a treat, wait, and repeat. Your BFF ...