If your ears are attuned to a sound, you can hear it and recognize it quickly. Their ears were still attuned to the sounds of the London suburb. be/become attuned to sth to be or become familiar with the way someone thinks or behaves so that you can react to them in a suitable way (tune)
so adjusted as to be appropriate or brought into harmony; "an industry not attuned to the demands of the market"; "a remark keyed to the situation"; "charges finely tuned to the amount a student can afford"