Noises and Sensor Wiring

Several kinds of noise affect the receiver.

Ambient noise contain surface-waves that can be attenuated using proper array distribution and non-coherent noise such as wind or traffic. Assuming the spatial distribution results in a sufficiently random sampling, the square-root estimation will apply. [link to variance propagation rule]

For inducted noise and instrument noise, the induction is proportional to the impedance, so the number of units in parallel \(N_p\) will attenuate the noise picked-up. On another hand increasing the number of units in serie \(N_s\) will increase the sensitivity, thus decreasing the relative instrument noise compared to the signal.