What is the process of digital communication where a threshold value is set at the receiver to reduce noise?

In digital data transmission, the transmitted bit undergoes attenuation with the distance.

Also, the effect of noise may alter the voltage levels of the transmitted bit

Thus, a threshold voltage is set at the receiver to decide whether the received bit is 0 or 1

Example:

Suppose the voltage level of transmitted bit for logic 1 is 5V

And for logic 0 is 0 V

Now threshold Voltage is set at 2.5 V

If the received voltage level is greater than 2.5 V bit is decoded as 1 else 0

Signal threshold