This is EXACTLY the kind of recipe I had been searching for! Super easy, lots of greens, and great taste! Seriously, I used almost a 2 whole cups of spinach in mine and with the banana and milk it doesnât taste bad at all. Thanks for this recipe, it gives me no excuses not to get my greens in:) Reply.
The laws of sound physics (acoustics) or How does it work? The human ear can generally hear sounds with frequencies between 20 Hz and 20 kHz (the so called âaudio rangeâ). 20 Hz is a very low frequency while 20 kHz is a very high frequency. Examples of low frequencies in our surroundings are the bass in music or the low humming that a fan generates. Examples of high frequencies are the treble in music or the high notes of a small child.
The number of cycles per second (Hertz) (abbreviated as, hz) of anything that oscillates is called the frequency. The electricity of an AC wall outlet is said to have a frequency of 60 Hertz as it cycles negative then positive 60 times each second. Sound is an oscillating wave, but it has a broad range of frequencies. A low frequency sound (say, 50 hz) might sound like a low rumble, while a high frequency sound (say 12,000 hz), might sound more like a sizzle. A person with normal hearing can hear all the way up to about 20,000 hz.