Original sentence: Audio noise measurement is a process carried out to assess the quality of audio equipment, such as the kind used in recording studios, broadcast engineering, and in-home high fidelity.Every piece of equipment which the recorded signal subsequently passes through will add a certain amount of electronic noise, the process of removing this and other noises is called noise reduction.In audio equipment noise is a low-level hiss or buzz that intrudes on audio output
Edited sentence: All recordings will contain some background noise that was picked up by microphones, such as the rumble of air conditioning, or the shuffling of an audience, but in addition to this, every piece of equipment which the recorded signal subsequently passes through will add a certain amount of electronic noise, which ideally should be so low as possible to contribute insignificantly to what is heard.Audio noise measurement is carried out to assess the quality of audio equipment, such as is used in recording studios, broadcast engineering, and in-home high fidelity.In general, noise refers to unwanted sound, but in audio systems it is the low-level hiss or buzz that intrudes on quiet passages that is of most interest