Sound frequencies below the audible range. This is generally below 20Hz.
Sound frequencies above the human audible range. This is generally at frequencies above 20kHz.
The study of all sound, including ultrasound and infrasound.
Mathematical concept whereby a number is multiplied by itself, e.g. 10 to the power of 2, which is 100.
An oscillatory disturbance which moves away from some source and transports no discernible amount of matter over large distances of propagation.
The pitch of a note, i.e. whether it is a high or low note.
Mechanical wave disturbances through matter, which may or may not be audible by the human ear.
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Muslim holiday that marks the end of Ramadan, Muslims are not only celebrating the end of fasting, but thanking GOD for the help and strength that he ...
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