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 pitch of a sound is directly related to the frequency of the vibrations of its waves. People with excellent hearing can hear very low sounds, vibrating about 20 times per second, all the way up to high pitches with frequencies of 20,000 vibrations per second. Other animals can hear sounds at higher vibrations.