i mean what is the relationship between SNR, CNR, and noise level

Suppose we have cable carrying a signal accompanied by noise, for which we know the SNR in dB. As a result of improvements in cable shielding and electronic design, we manage to reduce the noise power (in Watts) by 50%. By how much does the SNR change? (Give the number in dB only - do not include your calculation and do not include units.)

What does the term “noise” refer to in communication theory?Group of answer choicesineffective verbal communication body language that complicates a verbal messagethe volume and complexity of verbal communicationany factor that distorts meaning

Time left 0:09:55Question 1Answer savedMarked out of 2.00Flag questionTipsQuestion textConsider the quantisation of a bandwidth-limited but randomly and continuously varying analogue signal. We wish to model the relationship between Signal to Quantisation noise power (in dB) and the number of bits m used by a linear quantiser (that is, the quantiser allows 2m possible levels). We are aware of the derived expression SNR = 6m - 7.3 dB, but we know that our signal does NOT have the ratio of standard definition to peak signal level assumed in that definition. Which of the following statements is true?Question 1Select one:We would expect the SNR to be linearly related to m, but both the slope and intercept of the linear equation would be different to that predicted by the above equationWe would expect the SNR to be linearly related to m, but while the intercept of the linear equation would be unchanged, the slope would be different to that predicted by the above equation We would expect the SNR to be linearly related to m, but the intercept of the linear equation would be different to that predicted by the above equationWe could not expect the above linear equation to describe the SNR vs m relationship at all; the relationship might no longer be linearClear my choiceQuestion 2Answer savedMarked out of 2.00Flag questionTipsQuestion textWhich of the following statements is/are true concerning carriage of streaming services over networks?Question 2Select one or more:Streaming services may be carried over circuit-switched, packet-switched or virtual circuit switched networksStreaming services can only be carried in packet form if the network provides virtual circuit switchingStreaming services require separate network infrastructure; they cannot be carried over the same network as bursty data servicesStreaming services generate bits continuously and so cannot be carried over packet switched networks

Name the first model of communication which introduces the role of noise

Level of noise recommended in most countries is*1 point30-40 dB95-100 d B85-90 d B75-80d B