What is Noise?
Did you know a cell tower actually creates noise on the network and that this noise is actually needed? Networks have an accepted value of approximately -121dBm that is factored into its design and algorithms. This is called the noise floor. When for example, you are on a phone call and you are the one speaking, if you hear ABSOLUTE silence in the ear piece, you will think the call was dropped. But under normal operation, there is a certain noise level that is needed to let you know that call is still active. However, what needs to be kept in check is the amount of noise in relation to the usable signal, better known as, signal to noise ratio. (SNR) This is where high quality filters and advanced engineering techniques come into play with our products.
Sound originates when a body moves back and forth rapidly enough to send a travelling wave through the medium in which it is vibrating. The transmitter of the sound, whether it is a voice or some other noise-making device, creates the sound by alternately compressing the air and then relaxing the compression. A sound wave consists of regions of compression, in which the air molecules are close together and the pressure is relatively high, alternating with areas of rarefaction, where the molecules are farther apart and the pressure is lower. The loudness of a sound is related to the amplitude of the sound wave that is, to the pressure difference between a zone of compression and a zone of rarefaction. The pitch of a sound is related to the frequency of the sound wave (usually expressed in cycles per second, or Hertz, Hz). In general, the greater the amplitude of a particular sound wave, the higher the pitch of the sound. The human ear is capable of detecting sound waves with frequencies
