Noise PSD and sampling rate relation

1. Does sample rate affect noise?
2. Does sampling rate affect SNR?
3. What is quantization noise and relation between sampling rate and quantization noise?
4. What is the relationship between sampling rate and frequency?

Does sample rate affect noise?

for the same wordsize, higher sampling rate increases the SNR (within a fixed bandwidth) by 6 dB or 1 added bit of resolution for every two octaves of sample rate. and that's without noise-shaping.

Does sampling rate affect SNR?

Noise bandwidth decrease, the output noise energy reduce and the output SNR increase with the sampling rate increasing. So, we can obtain high SNR by increasing the sampling rate.

What is quantization noise and relation between sampling rate and quantization noise?

The quantization noise presents a chaotic behavior because for some values of the relation between the signal and the sampling frequencies presents a very well defined structure, while for other values this structure is lost. The dependency with the signal phase should also be remarked.

What is the relationship between sampling rate and frequency?

Sampling rate determines the sound frequency range (corresponding to pitch) which can be represented in the digital waveform. The range of frequencies represented in a waveform is often called its bandwidth.