Select the correct statement(s) regarding the signal-to-noise ratio (SNR).
A. SNR represents the ratio of transmit signal power over the noise power of all sources including thermal, impulse, IM, CCI, and crosstalk noise.
B. the noise (i.e., noise floor) in the signal-to-noise ratio, is a wideband noise product that is predominated by thermal noise.
C. the noise power, in the signal-to-noise ratio, occupies a narrow band in the frequency domain.
D. all of the above are correct statements.

Sound can be defined as mechanical waves that are highly dependent on matter for their propagation and transmission. Sound travels faster through solids than it does through either liquids or gases.

Signal-to-noise ratio (SNR) is simply the ratio of signal power to noise power or the ratio of desired information to the undesired signal. SNR doesn't have a unit i.e it is a unitless quantity.

Generally, the higher the signal-to-noise ratio (SNR), the better would be the quality of a signal.

Additionally, a negative signal-to-noise ratio (SNR) in decibel form simply means that the signal power is lesser than the noise power.

Hence, the correct statement regarding the signal-to-noise ratio (SNR) is that the noise (i.e., noise floor) in the signal-to-noise ratio, is a wideband noise product that is predominated by thermal noise.

Note: noise can be defined as an unwanted disturbance or undesired signal present in an electrical signal.