generate questions: Perceived quality can be influenced by listening environment (ambient noise), listener attention, and listener training and in most cases by listener audio equipment (such as sound cards, speakers and headphones).
A listening environment is also know by which term? {sep_token} Other than speakers and headphones, what other piece of equipment affects the listener's perceived quality? {sep_token} Listening environment, listener attention, listener training and listener audio equipment can all affect what kind of quality?