Summary of this page : This page talks about the characteristics of sound and the low /high frequency waves. These characteristics are Amplitude , frequency and Wavelength. Amplitude is the height of a sound wave measured from the mid-line. Frequency talks about how much sound waves make in one second, frequency is sort of a pitch which can be heard if you have ever heard the growl of a dog and thunder . Wavelength is the distance. Wavelength is related to frequency , if the sound does not reach a point the means the wavelength has created a love wavelength sound.
High and low frequency waves are all based on the pitch of a sound rather than how loud the sound is. Like music notes ! the higher the pitch the higher the frequency and the lower the pitch such as a tuba ? , cello or Organ the lower the frequency. These give off the right example of low frequency sounds !